| short_name: | ATL12 |
| level: | L3A |
| description: | Sea Surface Height (SSH) of the global open ocean including the ice-free seasonal ice zone (SIZ) and near-coast regions. |
| Conventions: | CF-1.6 |
| contributor_name: | Thomas A Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) |
| contributor_role: | Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer |
| date_type: | UTC |
| featureType: | trajectory |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_units: | degrees_east |
| granule_type: | ATL12 |
| identifier_product_doi: | 10.5067/ATLAS/ATL12.001 |
| identifier_product_doi_authority: | http://dx.doi.org |
| identifier_product_type: | ATL12 |
| license: | Data may not be reproduced or distributed without including the citation for this product included in this metadata. Data may not be distributed in an altered form without the written permission of the ICESat-2 Science Project Office at NASA/GSFC. |
| naming_authority: | http://dx.doi.org |
| spatial_coverage_type: | Horizontal |
| standard_name_vocabulary: | CF-1.6 |
| time_type: | CCSDS UTC-A |
| date_created: | 2023-04-09T13:26:25.000000Z |
| hdfversion: | HDF5 1.10.7 |
| history: | 2023-04-09T13:26:25.000000Z;3d77224d-78d3-3fad-b99e-a4d18d815b5d;Created by PGE atlas_l3a_oc Version 5.0 |
| identifier_file_uuid: | 3d77224d-78d3-3fad-b99e-a4d18d815b5d |
| identifier_product_format_version: | 5.0 |
| time_coverage_duration: | 22630.000000000000 |
| time_coverage_end: | 2019-03-31T03:39:51.000000Z |
| time_coverage_start: | 2019-03-30T21:22:41.000000Z |
| geospatial_lat_min: | -74.779472467176078 |
| geospatial_lon_min: | -121.12279854871949 |
| geospatial_lat_max: | 88.040488398535899 |
| geospatial_lon_max: | 153.00250127091380 |
| publisher_name: | NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center |
| publisher_email: | nsidc@nsidc.org |
| publisher_url: | http://nsidc.org/daac/ |
| title: | ATLAS/ICESat-2 L3A Ocean Surface Height |
| identifier_file_product_type: | ATL12 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| summary: | The purpose of ATL12 is to provide along-track sea surface heights and associated statistics. |
| keywords: | EARTH SCIENCE > OCEANS > SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT > NONE > NONE > NONE |
| keywords_vocabulary: | NASA/GCMD Science Keywords |
| citation: | Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center. |
| processing_level: | 3A |
| references: | http://nsidc.org/data/icesat2/data.html |
| project: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| instrument: | ATLAS > Advanced Topographic Laser Altimeter System |
| platform: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| source: | Spacecraft |
| Unlimited_Dimension: | ds_a, ds_wn, ds_xbin, ds_y_bincenters, gt1l_ssh_segments_delta_time, gt1r_ssh_segments_delta_time, gt2l_ssh_segments_delta_time, gt2r_ssh_segments_delta_time, gt3l_ssh_segments_delta_time, gt3r_ssh_segments_delta_time, orbit_info_crossing_time, orbit_info_sc_orient_time, quality_assessment_ds_lat_bincenters |
| orbit_info_cycle_number: | Array of 16 bit Integers [orbit_info_crossing_time = 0..3] long_name: Cycle Number units: 1 source: Operations valid_min: 0 valid_max: 50 contentType: referenceInformation description: A count of the number of exact repeats of this reference orbit. origname: cycle_number fullnamepath: /orbit_info/cycle_number coordinates: orbit_info_crossing_time |
| orbit_info_orbit_number: | Array of 16 bit Unsigned integers [orbit_info_crossing_time = 0..3] long_name: Orbit Number units: 1 valid_min: 1 valid_max: 65000 contentType: referenceInformation description: Unique identifying number for each planned ICESat-2 orbit. source: Operations origname: orbit_number fullnamepath: /orbit_info/orbit_number coordinates: orbit_info_crossing_time |
| orbit_info_lan: | Array of 64 bit Reals [orbit_info_crossing_time = 0..3] long_name: Ascending Node Longitude units: degrees_east source: POD/PPD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Longitude at the ascending node crossing. origname: lan fullnamepath: /orbit_info/lan coordinates: orbit_info_crossing_time |
| orbit_info_sc_orient: | Array of 16 bit Integers [orbit_info_sc_orient_time = 0..0] long_name: Spacecraft Orientation units: 1 source: POD/PPD valid_min: 0 valid_max: 2 contentType: referenceInformation description: This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. flag_meanings: backward forward transition flag_values: 0, 1, 2 origname: sc_orient fullnamepath: /orbit_info/sc_orient coordinates: orbit_info_sc_orient_time |
| orbit_info_rgt: | Array of 16 bit Integers [orbit_info_crossing_time = 0..3] long_name: Reference Ground track units: 1 source: POD/PPD valid_min: 1 valid_max: 1387 contentType: referenceInformation description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. origname: rgt fullnamepath: /orbit_info/rgt coordinates: orbit_info_crossing_time |
| gt1r_ssh_segments_delt_seg: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt1r/ssh_segments/delt_seg coordinates: gt1r_ssh_segments_delta_time |
| gt1r_ssh_segments_longitude: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt1r/ssh_segments/longitude coordinates: gt1r_ssh_segments_delta_time |
| gt1r_ssh_segments_latitude: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt1r/ssh_segments/latitude coordinates: gt1r_ssh_segments_delta_time |
| gt1r_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt1r/ssh_segments/heights/mix_mu1 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_y: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt1r/ssh_segments/heights/y coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt1r/ssh_segments/heights/snr_harm coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt1r/ssh_segments/heights/mix_sig2 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt1r/ssh_segments/heights/mix_m2 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt1r/ssh_segments/heights/bin_ssbias coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt1r/ssh_segments/heights/h_skewness coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt1r/ssh_segments/heights/mix_sig1 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_wn: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt1r/ssh_segments/heights/wn coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt1r/ssh_segments/heights/n_pulse_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt1r/ssh_segments/heights/np_effect coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt1r/ssh_segments/heights/xbind coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_a: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt1r/ssh_segments/heights/a coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt1r/ssh_segments/heights/length_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_p0: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt1r/ssh_segments/heights/p0 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt1r/ssh_segments/heights/h_kurtosis coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt1r/ssh_segments/heights/dxbar coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt1r/ssh_segments/heights/yvar coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt1r/ssh_segments/heights/h_uncrtn coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt1r/ssh_segments/heights/h_var coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt1r/ssh_segments/heights/ykurt coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt1r/ssh_segments/heights/ymean coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_swh: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt1r/ssh_segments/heights/swh coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt1r/ssh_segments/heights/nbin10 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt1r/ssh_segments/heights/latbind coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt1r/ssh_segments/heights/xrbin coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt1r/ssh_segments/heights/dxskew coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt1r/ssh_segments/heights/lonbind coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt1r/ssh_segments/heights/meanoffit2 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt1r/ssh_segments/heights/mix_mu2 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt1r/ssh_segments/heights/l_scale coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt1r/ssh_segments/heights/dxvar coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_h: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt1r/ssh_segments/heights/h coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_p1: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt1r/ssh_segments/heights/p1 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt1r/ssh_segments/heights/htybin coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt1r/ssh_segments/heights/mix_m1 coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt1r/ssh_segments/heights/yskew coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt1r/ssh_segments/stats/first_geoseg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt1r/ssh_segments/stats/layer_flag_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt1r/ssh_segments/stats/tide_pole_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt1r/ssh_segments/stats/tide_earth_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt1r/ssh_segments/stats/near_sat_fract_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt1r/ssh_segments/stats/solar_elevation_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt1r/ssh_segments/stats/geoid_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt1r/ssh_segments/stats/ss_corr_stdev coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt1r/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt1r/ssh_segments/stats/seg_dist_x_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt1r/ssh_segments/stats/podppd_flag_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt1r/ssh_segments/stats/fpb_corr coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt1r/ssh_segments/stats/tide_ocean_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt1r/ssh_segments/stats/fpb_corr_stdev coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt1r/ssh_segments/stats/orbit_number coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt1r/ssh_segments/stats/full_sat_fract_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt1r/ssh_segments/stats/ice_conc coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt1r/ssh_segments/stats/ref_azimuth_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt1r/ssh_segments/stats/tide_oc_pole_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt1r/ssh_segments/stats/surf_type_prcnt coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt1r/ssh_segments/stats/dac_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt1r/ssh_segments/stats/solar_azimuth_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt1r/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1r_ssh_segments_delta_time = 0..3544] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt1r/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt1r/ssh_segments/stats/last_geoseg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt1r/ssh_segments/stats/geoid_free2mean_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt1r/ssh_segments/stats/tide_load_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt1r/ssh_segments/stats/neutat_delay_total_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt1r/ssh_segments/stats/first_tx_pulse coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt1r/ssh_segments/stats/tide_equilibrium_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt1r/ssh_segments/stats/cloudcover_percent_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt1r/ssh_segments/stats/backgr_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt1r/ssh_segments/stats/ss_corr coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3544] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt1r/ssh_segments/stats/last_tx_pulse coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt1r/ssh_segments/stats/photon_noise_rate coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt1r/ssh_segments/stats/photon_rate coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt1r/ssh_segments/stats/depth_ocn_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt1r_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt1r/ssh_segments/stats/ref_elev_seg coordinates: gt1r_ssh_segments_delta_time gt1r_ssh_segments_latitude gt1r_ssh_segments_longitude |
| gt2r_ssh_segments_delt_seg: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt2r/ssh_segments/delt_seg coordinates: gt2r_ssh_segments_delta_time |
| gt2r_ssh_segments_longitude: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt2r/ssh_segments/longitude coordinates: gt2r_ssh_segments_delta_time |
| gt2r_ssh_segments_latitude: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt2r/ssh_segments/latitude coordinates: gt2r_ssh_segments_delta_time |
| gt2r_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt2r/ssh_segments/heights/mix_mu1 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_y: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt2r/ssh_segments/heights/y coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt2r/ssh_segments/heights/snr_harm coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt2r/ssh_segments/heights/mix_sig2 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt2r/ssh_segments/heights/mix_m2 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt2r/ssh_segments/heights/bin_ssbias coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt2r/ssh_segments/heights/h_skewness coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt2r/ssh_segments/heights/mix_sig1 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_wn: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt2r/ssh_segments/heights/wn coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt2r/ssh_segments/heights/n_pulse_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt2r/ssh_segments/heights/np_effect coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt2r/ssh_segments/heights/xbind coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_a: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt2r/ssh_segments/heights/a coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt2r/ssh_segments/heights/length_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_p0: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt2r/ssh_segments/heights/p0 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt2r/ssh_segments/heights/h_kurtosis coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt2r/ssh_segments/heights/dxbar coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt2r/ssh_segments/heights/yvar coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt2r/ssh_segments/heights/h_uncrtn coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt2r/ssh_segments/heights/h_var coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt2r/ssh_segments/heights/ykurt coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt2r/ssh_segments/heights/ymean coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_swh: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt2r/ssh_segments/heights/swh coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt2r/ssh_segments/heights/nbin10 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt2r/ssh_segments/heights/latbind coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt2r/ssh_segments/heights/xrbin coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt2r/ssh_segments/heights/dxskew coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt2r/ssh_segments/heights/lonbind coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt2r/ssh_segments/heights/meanoffit2 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt2r/ssh_segments/heights/mix_mu2 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt2r/ssh_segments/heights/l_scale coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt2r/ssh_segments/heights/dxvar coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_h: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt2r/ssh_segments/heights/h coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_p1: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt2r/ssh_segments/heights/p1 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt2r/ssh_segments/heights/htybin coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt2r/ssh_segments/heights/mix_m1 coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt2r/ssh_segments/heights/yskew coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt2r/ssh_segments/stats/first_geoseg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt2r/ssh_segments/stats/layer_flag_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt2r/ssh_segments/stats/tide_pole_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt2r/ssh_segments/stats/tide_earth_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt2r/ssh_segments/stats/near_sat_fract_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt2r/ssh_segments/stats/solar_elevation_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt2r/ssh_segments/stats/geoid_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt2r/ssh_segments/stats/ss_corr_stdev coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt2r/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt2r/ssh_segments/stats/seg_dist_x_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt2r/ssh_segments/stats/podppd_flag_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt2r/ssh_segments/stats/fpb_corr coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt2r/ssh_segments/stats/tide_ocean_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt2r/ssh_segments/stats/fpb_corr_stdev coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt2r/ssh_segments/stats/orbit_number coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt2r/ssh_segments/stats/full_sat_fract_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt2r/ssh_segments/stats/ice_conc coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt2r/ssh_segments/stats/ref_azimuth_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt2r/ssh_segments/stats/tide_oc_pole_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt2r/ssh_segments/stats/surf_type_prcnt coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt2r/ssh_segments/stats/dac_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt2r/ssh_segments/stats/solar_azimuth_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt2r/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2r_ssh_segments_delta_time = 0..3452] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt2r/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt2r/ssh_segments/stats/last_geoseg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt2r/ssh_segments/stats/geoid_free2mean_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt2r/ssh_segments/stats/tide_load_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt2r/ssh_segments/stats/neutat_delay_total_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt2r/ssh_segments/stats/first_tx_pulse coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt2r/ssh_segments/stats/tide_equilibrium_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt2r/ssh_segments/stats/cloudcover_percent_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt2r/ssh_segments/stats/backgr_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt2r/ssh_segments/stats/ss_corr coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..3452] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt2r/ssh_segments/stats/last_tx_pulse coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt2r/ssh_segments/stats/photon_noise_rate coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt2r/ssh_segments/stats/photon_rate coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt2r/ssh_segments/stats/depth_ocn_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt2r_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt2r/ssh_segments/stats/ref_elev_seg coordinates: gt2r_ssh_segments_delta_time gt2r_ssh_segments_latitude gt2r_ssh_segments_longitude |
| gt1l_ssh_segments_delt_seg: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt1l/ssh_segments/delt_seg coordinates: gt1l_ssh_segments_delta_time |
| gt1l_ssh_segments_longitude: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt1l/ssh_segments/longitude coordinates: gt1l_ssh_segments_delta_time |
| gt1l_ssh_segments_latitude: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt1l/ssh_segments/latitude coordinates: gt1l_ssh_segments_delta_time |
| gt1l_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt1l/ssh_segments/heights/mix_mu1 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_y: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt1l/ssh_segments/heights/y coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt1l/ssh_segments/heights/snr_harm coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt1l/ssh_segments/heights/mix_sig2 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt1l/ssh_segments/heights/mix_m2 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt1l/ssh_segments/heights/bin_ssbias coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt1l/ssh_segments/heights/h_skewness coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt1l/ssh_segments/heights/mix_sig1 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_wn: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt1l/ssh_segments/heights/wn coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt1l/ssh_segments/heights/n_pulse_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt1l/ssh_segments/heights/np_effect coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt1l/ssh_segments/heights/xbind coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_a: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt1l/ssh_segments/heights/a coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt1l/ssh_segments/heights/length_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_p0: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt1l/ssh_segments/heights/p0 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt1l/ssh_segments/heights/h_kurtosis coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt1l/ssh_segments/heights/dxbar coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt1l/ssh_segments/heights/yvar coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt1l/ssh_segments/heights/h_uncrtn coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt1l/ssh_segments/heights/h_var coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt1l/ssh_segments/heights/ykurt coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt1l/ssh_segments/heights/ymean coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_swh: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt1l/ssh_segments/heights/swh coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt1l/ssh_segments/heights/nbin10 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt1l/ssh_segments/heights/latbind coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt1l/ssh_segments/heights/xrbin coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt1l/ssh_segments/heights/dxskew coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt1l/ssh_segments/heights/lonbind coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt1l/ssh_segments/heights/meanoffit2 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt1l/ssh_segments/heights/mix_mu2 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt1l/ssh_segments/heights/l_scale coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt1l/ssh_segments/heights/dxvar coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_h: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt1l/ssh_segments/heights/h coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_p1: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt1l/ssh_segments/heights/p1 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt1l/ssh_segments/heights/htybin coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt1l/ssh_segments/heights/mix_m1 coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt1l/ssh_segments/heights/yskew coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt1l/ssh_segments/stats/first_geoseg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt1l/ssh_segments/stats/layer_flag_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt1l/ssh_segments/stats/tide_pole_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt1l/ssh_segments/stats/tide_earth_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt1l/ssh_segments/stats/near_sat_fract_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt1l/ssh_segments/stats/solar_elevation_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt1l/ssh_segments/stats/geoid_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt1l/ssh_segments/stats/ss_corr_stdev coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt1l/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt1l/ssh_segments/stats/seg_dist_x_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt1l/ssh_segments/stats/podppd_flag_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt1l/ssh_segments/stats/fpb_corr coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt1l/ssh_segments/stats/tide_ocean_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt1l/ssh_segments/stats/fpb_corr_stdev coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt1l/ssh_segments/stats/orbit_number coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt1l/ssh_segments/stats/full_sat_fract_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt1l/ssh_segments/stats/ice_conc coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt1l/ssh_segments/stats/ref_azimuth_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt1l/ssh_segments/stats/tide_oc_pole_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt1l/ssh_segments/stats/surf_type_prcnt coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt1l/ssh_segments/stats/dac_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt1l/ssh_segments/stats/solar_azimuth_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt1l/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1l_ssh_segments_delta_time = 0..20827] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt1l/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt1l/ssh_segments/stats/last_geoseg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt1l/ssh_segments/stats/geoid_free2mean_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt1l/ssh_segments/stats/tide_load_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt1l/ssh_segments/stats/neutat_delay_total_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt1l/ssh_segments/stats/first_tx_pulse coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt1l/ssh_segments/stats/tide_equilibrium_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt1l/ssh_segments/stats/cloudcover_percent_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt1l/ssh_segments/stats/backgr_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt1l/ssh_segments/stats/ss_corr coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..20827] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt1l/ssh_segments/stats/last_tx_pulse coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt1l/ssh_segments/stats/photon_noise_rate coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt1l/ssh_segments/stats/photon_rate coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt1l/ssh_segments/stats/depth_ocn_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| gt1l_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt1l/ssh_segments/stats/ref_elev_seg coordinates: gt1l_ssh_segments_delta_time gt1l_ssh_segments_latitude gt1l_ssh_segments_longitude |
| quality_assessment_dot_std_lat: | Array of 32 bit Reals [quality_assessment_ds_lat_bincenters = 0..17] _FillValue: 3.402823466e+38 long_name: Standard deviation of DOT for each 10degree bin units: meters source: Ocean ATBD contentType: referenceInformation description: Standard deviations of dynamic ocean topography (DOT equal to h-geoid_seg) for each of the 18 ten-degree latitude bands origname: dot_std_lat fullnamepath: /quality_assessment/dot_std_lat |
| quality_assessment_qa_granule_pass_fail: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Granule Pass Flag units: 1 source: Operations valid_min: 0 valid_max: 1 contentType: qualityInformation description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. flag_meanings: PASS FAIL flag_values: 0, 1 origname: qa_granule_pass_fail fullnamepath: /quality_assessment/qa_granule_pass_fail |
| quality_assessment_dot_std: | Array of 32 bit Reals [FakeDim0 = 0..0] _FillValue: 3.402823466e+38 long_name: Standard deviation of DOT for the granule units: meters source: Ocean ATBD contentType: referenceInformation description: Standard deviation of dynamic ocean topography (DOT equal to h-geoid_seg) of the entire ATL12. origname: dot_std fullnamepath: /quality_assessment/dot_std |
| quality_assessment_dot_mean_lat: | Array of 32 bit Reals [quality_assessment_ds_lat_bincenters = 0..17] _FillValue: 3.402823466e+38 long_name: Average DOT for each 10degree bin units: meters source: Ocean ATBD contentType: referenceInformation description: Means of dynamic ocean topography (DOT equal to h-geoid_seg) for each of the 18 ten-degree latitude bands origname: dot_mean_lat fullnamepath: /quality_assessment/dot_mean_lat |
| quality_assessment_qa_granule_fail_reason: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Granule Failure Reason units: 1 source: Operations valid_min: 0 valid_max: 5 contentType: qualityInformation description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD_Failure; 5=other failure. flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE flag_values: 0, 1, 2, 3, 4, 5 origname: qa_granule_fail_reason fullnamepath: /quality_assessment/qa_granule_fail_reason |
| quality_assessment_dot_mean: | Array of 32 bit Reals [FakeDim0 = 0..0] _FillValue: 3.402823466e+38 long_name: Average DOT for the granule units: meters source: Ocean ATBD contentType: referenceInformation description: Mean of dynamic ocean topography (DOT equal to h-geoid_seg) of the entire ATL12. origname: dot_mean fullnamepath: /quality_assessment/dot_mean |
| quality_assessment_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Earliest time for the granule in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /quality_assessment/delta_time |
| gt3l_ssh_segments_delt_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt3l/ssh_segments/delt_seg coordinates: gt3l_ssh_segments_delta_time |
| gt3l_ssh_segments_longitude: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt3l/ssh_segments/longitude coordinates: gt3l_ssh_segments_delta_time |
| gt3l_ssh_segments_latitude: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt3l/ssh_segments/latitude coordinates: gt3l_ssh_segments_delta_time |
| gt3l_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt3l/ssh_segments/heights/mix_mu1 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_y: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt3l/ssh_segments/heights/y coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt3l/ssh_segments/heights/snr_harm coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt3l/ssh_segments/heights/mix_sig2 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt3l/ssh_segments/heights/mix_m2 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt3l/ssh_segments/heights/bin_ssbias coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt3l/ssh_segments/heights/h_skewness coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt3l/ssh_segments/heights/mix_sig1 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_wn: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt3l/ssh_segments/heights/wn coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt3l/ssh_segments/heights/n_pulse_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt3l/ssh_segments/heights/np_effect coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt3l/ssh_segments/heights/xbind coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_a: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt3l/ssh_segments/heights/a coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt3l/ssh_segments/heights/length_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_p0: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt3l/ssh_segments/heights/p0 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt3l/ssh_segments/heights/h_kurtosis coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt3l/ssh_segments/heights/dxbar coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt3l/ssh_segments/heights/yvar coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt3l/ssh_segments/heights/h_uncrtn coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt3l/ssh_segments/heights/h_var coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt3l/ssh_segments/heights/ykurt coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt3l/ssh_segments/heights/ymean coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_swh: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt3l/ssh_segments/heights/swh coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt3l/ssh_segments/heights/nbin10 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt3l/ssh_segments/heights/latbind coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt3l/ssh_segments/heights/xrbin coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt3l/ssh_segments/heights/dxskew coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt3l/ssh_segments/heights/lonbind coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt3l/ssh_segments/heights/meanoffit2 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt3l/ssh_segments/heights/mix_mu2 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt3l/ssh_segments/heights/l_scale coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt3l/ssh_segments/heights/dxvar coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_h: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt3l/ssh_segments/heights/h coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_p1: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt3l/ssh_segments/heights/p1 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt3l/ssh_segments/heights/htybin coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt3l/ssh_segments/heights/mix_m1 coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt3l/ssh_segments/heights/yskew coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt3l/ssh_segments/stats/first_geoseg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt3l/ssh_segments/stats/layer_flag_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt3l/ssh_segments/stats/tide_pole_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt3l/ssh_segments/stats/tide_earth_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt3l/ssh_segments/stats/near_sat_fract_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt3l/ssh_segments/stats/solar_elevation_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt3l/ssh_segments/stats/geoid_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt3l/ssh_segments/stats/ss_corr_stdev coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt3l/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt3l/ssh_segments/stats/seg_dist_x_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt3l/ssh_segments/stats/podppd_flag_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt3l/ssh_segments/stats/fpb_corr coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt3l/ssh_segments/stats/tide_ocean_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt3l/ssh_segments/stats/fpb_corr_stdev coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt3l/ssh_segments/stats/orbit_number coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt3l/ssh_segments/stats/full_sat_fract_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt3l/ssh_segments/stats/ice_conc coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt3l/ssh_segments/stats/ref_azimuth_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt3l/ssh_segments/stats/tide_oc_pole_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt3l/ssh_segments/stats/surf_type_prcnt coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt3l/ssh_segments/stats/dac_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt3l/ssh_segments/stats/solar_azimuth_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt3l/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3l_ssh_segments_delta_time = 0..20325] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt3l/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt3l/ssh_segments/stats/last_geoseg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt3l/ssh_segments/stats/geoid_free2mean_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt3l/ssh_segments/stats/tide_load_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt3l/ssh_segments/stats/neutat_delay_total_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt3l/ssh_segments/stats/first_tx_pulse coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt3l/ssh_segments/stats/tide_equilibrium_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt3l/ssh_segments/stats/cloudcover_percent_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt3l/ssh_segments/stats/backgr_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt3l/ssh_segments/stats/ss_corr coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..20325] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt3l/ssh_segments/stats/last_tx_pulse coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt3l/ssh_segments/stats/photon_noise_rate coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt3l/ssh_segments/stats/photon_rate coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt3l/ssh_segments/stats/depth_ocn_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt3l_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt3l/ssh_segments/stats/ref_elev_seg coordinates: gt3l_ssh_segments_delta_time gt3l_ssh_segments_latitude gt3l_ssh_segments_longitude |
| gt2l_ssh_segments_delt_seg: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt2l/ssh_segments/delt_seg coordinates: gt2l_ssh_segments_delta_time |
| gt2l_ssh_segments_longitude: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt2l/ssh_segments/longitude coordinates: gt2l_ssh_segments_delta_time |
| gt2l_ssh_segments_latitude: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt2l/ssh_segments/latitude coordinates: gt2l_ssh_segments_delta_time |
| gt2l_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt2l/ssh_segments/heights/mix_mu1 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_y: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt2l/ssh_segments/heights/y coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt2l/ssh_segments/heights/snr_harm coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt2l/ssh_segments/heights/mix_sig2 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt2l/ssh_segments/heights/mix_m2 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt2l/ssh_segments/heights/bin_ssbias coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt2l/ssh_segments/heights/h_skewness coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt2l/ssh_segments/heights/mix_sig1 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_wn: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt2l/ssh_segments/heights/wn coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt2l/ssh_segments/heights/n_pulse_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt2l/ssh_segments/heights/np_effect coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt2l/ssh_segments/heights/xbind coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_a: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt2l/ssh_segments/heights/a coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt2l/ssh_segments/heights/length_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_p0: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt2l/ssh_segments/heights/p0 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt2l/ssh_segments/heights/h_kurtosis coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt2l/ssh_segments/heights/dxbar coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt2l/ssh_segments/heights/yvar coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt2l/ssh_segments/heights/h_uncrtn coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt2l/ssh_segments/heights/h_var coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt2l/ssh_segments/heights/ykurt coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt2l/ssh_segments/heights/ymean coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_swh: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt2l/ssh_segments/heights/swh coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt2l/ssh_segments/heights/nbin10 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt2l/ssh_segments/heights/latbind coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt2l/ssh_segments/heights/xrbin coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt2l/ssh_segments/heights/dxskew coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt2l/ssh_segments/heights/lonbind coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt2l/ssh_segments/heights/meanoffit2 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt2l/ssh_segments/heights/mix_mu2 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt2l/ssh_segments/heights/l_scale coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt2l/ssh_segments/heights/dxvar coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_h: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt2l/ssh_segments/heights/h coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_p1: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt2l/ssh_segments/heights/p1 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt2l/ssh_segments/heights/htybin coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt2l/ssh_segments/heights/mix_m1 coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt2l/ssh_segments/heights/yskew coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt2l/ssh_segments/stats/first_geoseg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt2l/ssh_segments/stats/layer_flag_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt2l/ssh_segments/stats/tide_pole_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt2l/ssh_segments/stats/tide_earth_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt2l/ssh_segments/stats/near_sat_fract_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt2l/ssh_segments/stats/solar_elevation_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt2l/ssh_segments/stats/geoid_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt2l/ssh_segments/stats/ss_corr_stdev coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt2l/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt2l/ssh_segments/stats/seg_dist_x_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt2l/ssh_segments/stats/podppd_flag_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt2l/ssh_segments/stats/fpb_corr coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt2l/ssh_segments/stats/tide_ocean_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt2l/ssh_segments/stats/fpb_corr_stdev coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt2l/ssh_segments/stats/orbit_number coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt2l/ssh_segments/stats/full_sat_fract_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt2l/ssh_segments/stats/ice_conc coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt2l/ssh_segments/stats/ref_azimuth_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt2l/ssh_segments/stats/tide_oc_pole_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt2l/ssh_segments/stats/surf_type_prcnt coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt2l/ssh_segments/stats/dac_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt2l/ssh_segments/stats/solar_azimuth_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt2l/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2l_ssh_segments_delta_time = 0..17312] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt2l/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt2l/ssh_segments/stats/last_geoseg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt2l/ssh_segments/stats/geoid_free2mean_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt2l/ssh_segments/stats/tide_load_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt2l/ssh_segments/stats/neutat_delay_total_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt2l/ssh_segments/stats/first_tx_pulse coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt2l/ssh_segments/stats/tide_equilibrium_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt2l/ssh_segments/stats/cloudcover_percent_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt2l/ssh_segments/stats/backgr_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt2l/ssh_segments/stats/ss_corr coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..17312] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt2l/ssh_segments/stats/last_tx_pulse coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt2l/ssh_segments/stats/photon_noise_rate coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt2l/ssh_segments/stats/photon_rate coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt2l/ssh_segments/stats/depth_ocn_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| gt2l_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt2l/ssh_segments/stats/ref_elev_seg coordinates: gt2l_ssh_segments_delta_time gt2l_ssh_segments_latitude gt2l_ssh_segments_longitude |
| ancillary_data_release: | Array of Strings [FakeDim0 = 0..0] long_name: Release Number units: 1 source: Operations contentType: auxiliaryInformation description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. origname: release fullnamepath: /ancillary_data/release |
| ancillary_data_end_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Geolocation Segment units: 1 source: Derived contentType: auxiliaryInformation description: The ending geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. origname: end_geoseg fullnamepath: /ancillary_data/end_geoseg |
| ancillary_data_version: | Array of Strings [FakeDim0 = 0..0] long_name: Version units: 1 source: Operations contentType: auxiliaryInformation description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. origname: version fullnamepath: /ancillary_data/version |
| ancillary_data_end_region: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Region units: 1 source: Derived contentType: auxiliaryInformation description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. origname: end_region fullnamepath: /ancillary_data/end_region |
| ancillary_data_atlas_sdp_gps_epoch: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS Epoch Offset units: seconds since 1980-01-06T00:00:00.000000Z source: Operations contentType: auxiliaryInformation description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. origname: atlas_sdp_gps_epoch fullnamepath: /ancillary_data/atlas_sdp_gps_epoch |
| ancillary_data_end_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Reference Groundtrack units: 1 source: Derived valid_min: 1 valid_max: 1387 contentType: auxiliaryInformation description: The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. origname: end_rgt fullnamepath: /ancillary_data/end_rgt |
| ancillary_data_end_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS End Time (Actual) standard_name: time units: seconds since 2018-01-01 source: Derived contentType: auxiliaryInformation description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: end_delta_time fullnamepath: /ancillary_data/end_delta_time |
| ancillary_data_end_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Orbit Number units: 1 source: Derived contentType: auxiliaryInformation description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. origname: end_orbit fullnamepath: /ancillary_data/end_orbit |
| ancillary_data_start_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Cycle units: 1 source: Derived valid_min: 0 valid_max: 99 contentType: auxiliaryInformation description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. origname: start_cycle fullnamepath: /ancillary_data/start_cycle |
| ancillary_data_data_end_utc: | Array of Strings [FakeDim0 = 0..0] long_name: End UTC Time of Granule (CCSDS-A, Actual) units: 1 source: Derived contentType: auxiliaryInformation description: UTC (in CCSDS-A format) of the last data point within the granule. origname: data_end_utc fullnamepath: /ancillary_data/data_end_utc |
| ancillary_data_control: | Array of Strings [FakeDim0 = 0..0] long_name: Control File units: 1 source: Operations contentType: auxiliaryInformation description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. origname: control fullnamepath: /ancillary_data/control |
| ancillary_data_start_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Start GPS SOW of Granule (Actual) units: seconds source: Derived contentType: auxiliaryInformation description: GPS seconds-of-week of the first data point in the granule. origname: start_gpssow fullnamepath: /ancillary_data/start_gpssow |
| ancillary_data_granule_end_utc: | Array of Strings [FakeDim0 = 0..0] long_name: End UTC Time of Granule (CCSDS-A, Requested) units: 1 source: Derived contentType: auxiliaryInformation description: Requested end time (in UTC CCSDS-A) of this granule. origname: granule_end_utc fullnamepath: /ancillary_data/granule_end_utc |
| ancillary_data_end_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending Cycle units: 1 source: Derived valid_min: 0 valid_max: 99 contentType: auxiliaryInformation description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. origname: end_cycle fullnamepath: /ancillary_data/end_cycle |
| ancillary_data_ocean_use_podppd_flag: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: use_podppd_flag units: 1 source: Control File Override ( Defined in Ocean ATBD section 4.2.1.2 Coarse selection ) valid_min: 0 valid_max: 1 contentType: auxiliaryInformation description: 0 - Ignore podppd_flag when processing ocean data; 1 - Skip data where podppd_flag is 1. flag_meanings: ignore_podppd_flag use_podppd_flag flag_values: 0, 1 origname: use_podppd_flag fullnamepath: /ancillary_data/ocean/use_podppd_flag |
| ancillary_data_ocean_depth_shore: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Depth Shore units: meters source: Control File Override ( Defined in Ocean ATBD section 4.2.1.2 Coarse selection ) contentType: auxiliaryInformation description: If ocean depth is less than depth_shore, then the current ocean segment is too close to land for ocean processing. origname: depth_shore fullnamepath: /ancillary_data/ocean/depth_shore |
| ancillary_data_ocean_ocseg_min_sig: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ocean Segment Minimum Signal Photons units: counts source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G contentType: auxiliaryInformation description: Minimum number of signal photons required to process an ocean segment. origname: ocseg_min_sig fullnamepath: /ancillary_data/ocean/ocseg_min_sig |
| ancillary_data_ocean_pts2bin: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Bins in Boxcar Smoother units: 1 source: Control File Override ( Defined in Ocean ATBD, section 5.3.2 step D and Table 5) contentType: auxiliaryInformation description: Defines the number of bins used in the boxcar smoother origname: pts2bin fullnamepath: /ancillary_data/ocean/pts2bin |
| ancillary_data_ocean_fine_max_secs: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Maximum Integration Time units: seconds source: Operations contentType: auxiliaryInformation description: Maximum fine segment duration of fine selection segment (equivalent to required number of tx pulses). origname: fine_max_secs fullnamepath: /ancillary_data/ocean/fine_max_secs |
| ancillary_data_ocean_sig_thres: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Signal Threshold units: percent source: Operations contentType: auxiliaryInformation description: Threshold for photons to be considered signal. origname: sig_thres fullnamepath: /ancillary_data/ocean/sig_thres |
| ancillary_data_ocean_conf_lim_min: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Fallback Minimum Confidence Level units: 1 source: Operations contentType: auxiliaryInformation description: Minimum fallback confidence level to be used in moving average. Typically 2 or 3. origname: conf_lim_min fullnamepath: /ancillary_data/ocean/conf_lim_min |
| ancillary_data_ocean_gaplimit: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Min Gap for Normal Harmonic Analysis units: meters source: Control File Override ( Defined in Ocean ATBD section 4.2.1.2 Coarse selection ) contentType: auxiliaryInformation description: Largest data gap for harmonic analysis. origname: gaplimit fullnamepath: /ancillary_data/ocean/gaplimit |
| ancillary_data_ocean_fine_min_sig: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Minimum Signal Photons units: counts contentType: auxiliaryInformation description: Minimum number of signal photons required to perform fine selection. source: Operations origname: fine_min_sig fullnamepath: /ancillary_data/ocean/fine_min_sig |
| ancillary_data_ocean_hist_bot: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Histogram Bottom units: meters source: Operations contentType: auxiliaryInformation description: Bottom (minimum height) of the coarse and fine select histograms. origname: hist_bot fullnamepath: /ancillary_data/ocean/hist_bot |
| ancillary_data_ocean_hist_bin_size: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Histogram Bin Size units: meters source: Operations contentType: auxiliaryInformation description: Height histogram and impulse response bin size in meters. origname: hist_bin_size fullnamepath: /ancillary_data/ocean/hist_bin_size |
| ancillary_data_ocean_gapfilldx: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Pseudo photon spacing units: meters source: Control File Override ( Defined in Ocean ATBD section 4.2.1.2 Coarse selection ) contentType: auxiliaryInformation description: Spacing of pseudo photons for harmonic analysis. origname: gapfilldx fullnamepath: /ancillary_data/ocean/gapfilldx |
| ancillary_data_ocean_layer_switch: | Array of 16 bit Integers [FakeDim0 = 0..0] long_name: layer_switch units: 1 source: Control File Override ( Defined in Ocean ATBD section 4.2.1.2 Coarse selection ) valid_min: 0 valid_max: 1 contentType: auxiliaryInformation description: Switch to enable usage of layer_flag from ATL09. 0 - Ignore layer_flag when processing ocean data (default); 1 - Process a 14 geoseg ocean segment only if layer_flag is also 1. flag_meanings: ignore_layer_flag use_layer_flag flag_values: 0, 1 origname: layer_switch fullnamepath: /ancillary_data/ocean/layer_switch |
| ancillary_data_ocean_cld_thres: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Cloud Threshold units: percent source: Operations contentType: auxiliaryInformation description: Data associated with cloud percentages above this threshold are not processed. origname: cld_thres fullnamepath: /ancillary_data/ocean/cld_thres |
| ancillary_data_ocean_min_sigconf: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Minimum Confidence Level in coarse_sel units: 1 source: Operations contentType: auxiliaryInformation description: Minimum confidence level to be used in coarse_sel. Typically 1. origname: min_sigconf fullnamepath: /ancillary_data/ocean/min_sigconf |
| ancillary_data_ocean_hist_top: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Histogram Top units: meters source: Operations contentType: auxiliaryInformation description: Top (maximum height) of the coarse and fine select histograms. origname: hist_top fullnamepath: /ancillary_data/ocean/hist_top |
| ancillary_data_ocean_hist_nbins: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Number of histogram bins. units: counts source: Derived contentType: auxiliaryInformation description: Number of bins in each histogram. origname: hist_nbins fullnamepath: /ancillary_data/ocean/hist_nbins |
| ancillary_data_ocean_conf_lim: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Minimum Confidence Level units: 1 source: Operations contentType: auxiliaryInformation description: Minimum confidence level to be included in moving average. Typically 3 or 4. origname: conf_lim fullnamepath: /ancillary_data/ocean/conf_lim |
| ancillary_data_ocean_proc_interval: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Processing interval units: counts source: Operations contentType: auxiliaryInformation description: The number of 20 meter segments read at once from ATL03. origname: proc_interval fullnamepath: /ancillary_data/ocean/proc_interval |
| ancillary_data_ocean_min_ph_pcnt: | Array of 32 bit Reals [FakeDim0 = 0..0] long_name: Minimum Photon Percentage units: percent source: Operations contentType: auxiliaryInformation description: Minimum percentage of the selected coarse photons being selected in fine_sel to continue processing. origname: min_ph_pcnt fullnamepath: /ancillary_data/ocean/min_ph_pcnt |
| ancillary_data_ocean_sw_delta_t: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Strong-Weak Delta Time units: seconds source: Operations contentType: auxiliaryInformation description: Approximate time differencebetween strong and weak beams for one segment_id. origname: sw_delta_t fullnamepath: /ancillary_data/ocean/sw_delta_t |
| ancillary_data_ocean_nphoton: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Half Number Photons For Average units: 1 source: Operations contentType: auxiliaryInformation description: Number of photons either side of central photon to consider averaging 5 for an 11 point average. origname: nphoton fullnamepath: /ancillary_data/ocean/nphoton |
| ancillary_data_ocean_oc_region: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ocean Region Index units: 1 source: Operations contentType: auxiliaryInformation description: The ocean region covered within this granule. origname: oc_region fullnamepath: /ancillary_data/ocean/oc_region |
| ancillary_data_ocean_nharms: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Number of Harmonics for Fit units: 1 source: Operations contentType: auxiliaryInformation description: Number of harmonics to fit to selected surface photons. origname: nharms fullnamepath: /ancillary_data/ocean/nharms |
| ancillary_data_ocean_coarse_interval: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Coarse selection interval units: seconds source: Operations contentType: auxiliaryInformation description: The number of seconds of data used for coarse selection (normally equivalent to 400 laser pulses). origname: coarse_interval fullnamepath: /ancillary_data/ocean/coarse_interval |
| ancillary_data_granule_start_utc: | Array of Strings [FakeDim0 = 0..0] long_name: Start UTC Time of Granule (CCSDS-A, Requested) units: 1 source: Derived contentType: auxiliaryInformation description: Requested start time (in UTC CCSDS-A) of this granule. origname: granule_start_utc fullnamepath: /ancillary_data/granule_start_utc |
| ancillary_data_start_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: ATLAS Start Time (Actual) standard_name: time units: seconds since 2018-01-01 source: Derived contentType: auxiliaryInformation description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: start_delta_time fullnamepath: /ancillary_data/start_delta_time |
| ancillary_data_start_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Geolocation Segment units: 1 source: Derived contentType: auxiliaryInformation description: The starting geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. origname: start_geoseg fullnamepath: /ancillary_data/start_geoseg |
| ancillary_data_start_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Orbit Number units: 1 source: Derived contentType: auxiliaryInformation description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. origname: start_orbit fullnamepath: /ancillary_data/start_orbit |
| ancillary_data_data_start_utc: | Array of Strings [FakeDim0 = 0..0] long_name: Start UTC Time of Granule (CCSDS-A, Actual) units: 1 source: Derived contentType: auxiliaryInformation description: UTC (in CCSDS-A format) of the first data point within the granule. origname: data_start_utc fullnamepath: /ancillary_data/data_start_utc |
| ancillary_data_end_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Ending GPSWeek of Granule (Actual) units: weeks from 1980-01-06 source: Derived contentType: auxiliaryInformation description: GPS week number of the last data point in the granule. origname: end_gpsweek fullnamepath: /ancillary_data/end_gpsweek |
| ancillary_data_start_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Reference Groundtrack units: 1 source: Derived valid_min: 1 valid_max: 1387 contentType: auxiliaryInformation description: The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. origname: start_rgt fullnamepath: /ancillary_data/start_rgt |
| ancillary_data_end_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: Ending GPS SOW of Granule (Actual) units: seconds source: Derived contentType: auxiliaryInformation description: GPS seconds-of-week of the last data point in the granule. origname: end_gpssow fullnamepath: /ancillary_data/end_gpssow |
| ancillary_data_qa_at_interval: | Array of 64 bit Reals [FakeDim0 = 0..0] long_name: QA Along-Track Interval units: 1 source: control contentType: auxiliaryInformation description: Statistics time interval for along-track QA data. origname: qa_at_interval fullnamepath: /ancillary_data/qa_at_interval |
| ancillary_data_start_region: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Starting Region units: 1 source: Derived contentType: auxiliaryInformation description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. origname: start_region fullnamepath: /ancillary_data/start_region |
| ancillary_data_start_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] long_name: Start GPSWeek of Granule (Actual) units: weeks from 1980-01-06 source: Derived contentType: auxiliaryInformation description: GPS week number of the first data point in the granule. origname: start_gpsweek fullnamepath: /ancillary_data/start_gpsweek |
| gt3r_ssh_segments_delt_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Ocean Segment Duration units: seconds source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Time duration segment origname: delt_seg fullnamepath: /gt3r/ssh_segments/delt_seg coordinates: gt3r_ssh_segments_delta_time |
| gt3r_ssh_segments_longitude: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Mean longitude of surface segment standard_name: longitude units: degrees_east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Mean longitude of surface photons in segment origname: longitude fullnamepath: /gt3r/ssh_segments/longitude coordinates: gt3r_ssh_segments_delta_time |
| gt3r_ssh_segments_latitude: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Mean latitude of surface segment standard_name: latitude units: degrees_north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Mean latitude of surface photons in segment origname: latitude fullnamepath: /gt3r/ssh_segments/latitude coordinates: gt3r_ssh_segments_delta_time |
| gt3r_ssh_segments_heights_mix_mu1: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Mean of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 1 in 2-component Gaussian mixture origname: mix_mu1 fullnamepath: /gt3r/ssh_segments/heights/mix_mu1 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_y: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_y_bincenters = 0..3000] long_name: PDF of Height units: 1/meter source: Ocean ATBD contentType: referenceInformation description: Probability density function of photon surface height origname: y fullnamepath: /gt3r/ssh_segments/heights/y coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_snr_harm: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Harmonic SNR units: meters**2/meters**2 source: Ocean ATBD contentType: referenceInformation description: Signal to noise ratio of harmonic fit with coefficients in a to the surface reflected photons including meanoffit2 and with data gaps greater than gaplimit filled with Gaussian white noise about meanoffit2 origname: snr_harm fullnamepath: /gt3r/ssh_segments/heights/snr_harm coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_mix_sig2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Standard deviation of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 2 in 2-component Gaussian mixture origname: mix_sig2 fullnamepath: /gt3r/ssh_segments/heights/mix_sig2 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_mix_m2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Fraction of component 2 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 2 in 2-component Gaussian mixture origname: mix_m2 fullnamepath: /gt3r/ssh_segments/heights/mix_m2 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_bin_ssbias: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Sea State Bias units: meters source: Ocean ATBD contentType: referenceInformation description: Sea state bias estimated from the correlation of photon return rate with along track 10-m bin averaged surface height (4.3.1) origname: bin_ssbias fullnamepath: /gt3r/ssh_segments/heights/bin_ssbias coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_h_skewness: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Skewness of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 contentType: referenceInformation description: Skewness of the photon sea surface height histogram. origname: h_skewness fullnamepath: /gt3r/ssh_segments/heights/h_skewness coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_mix_sig1: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Standard deviation of component 1 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Standard deviation of component 1 in 2-component Gaussian mixture origname: mix_sig1 fullnamepath: /gt3r/ssh_segments/heights/mix_sig1 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_wn: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_wn = 0..31] long_name: Harmonic Wave Numbers units: 1/meters source: Ocean ATBD, Section 5.3.3.2 step 1 contentType: referenceInformation description: nharms (32) wavenumbers, equal to the inverse of wavelengths for each harmonic component in harmonic analysis of heights. origname: wn fullnamepath: /gt3r/ssh_segments/heights/wn coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_n_pulse_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Number laser pulses segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of laser pulses in segment origname: n_pulse_seg fullnamepath: /gt3r/ssh_segments/heights/n_pulse_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_np_effect: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Degrees of Freedom units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Effective degrees of freedom of the average sea surface height for the ocean segment origname: np_effect fullnamepath: /gt3r/ssh_segments/heights/np_effect coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_xbind: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average distance for each 10m bin units: meters source: Ocean ATBD valid_min: 0.000000000 valid_max: 8000.000000 contentType: referenceInformation description: Averages of along-track distance in each 10-meter bin origname: xbind fullnamepath: /gt3r/ssh_segments/heights/xbind coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_a: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_a = 0..64] long_name: Harmonic Coefficients units: meters source: Ocean ATBD, Section 5.3.3.2, step 4 contentType: referenceInformation description: Vector of 2 x nharms + 1 coefficients for each harmonic component in the harmonic analysis of heights. a(1,oc_seg) is the coefficient for wavenumber equal zero. a(even index j, oc_seg) is the sine coefficient for wn(j/2), and a(odd index j, oc_seg) is the cosine coefficient for wn((j-1)/2) origname: a fullnamepath: /gt3r/ssh_segments/heights/a coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_length_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Length of segment units: meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Length of segment (m) origname: length_seg fullnamepath: /gt3r/ssh_segments/heights/length_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_p0: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Intercept of Linear Fit units: meters source: Ocean ATBD contentType: referenceInformation description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding origname: p0 fullnamepath: /gt3r/ssh_segments/heights/p0 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_h_kurtosis: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: kurtosis of sea surface height units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. contentType: referenceInformation description: Excess kurtosis of the sea surface height histogram. origname: h_kurtosis fullnamepath: /gt3r/ssh_segments/heights/h_kurtosis coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_dxbar: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Mean Dist Between Signal Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Mean distance between signal photons. origname: dxbar fullnamepath: /gt3r/ssh_segments/heights/dxbar coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_yvar: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Y Variance units: meter^2 source: Ocean ATBD contentType: referenceInformation description: Variance (second moment of Y) calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). origname: yvar fullnamepath: /gt3r/ssh_segments/heights/yvar coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_h_uncrtn: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Uncertaintity in mean SSH units: 1 source: Ocean ATBD, Section 5.3.6.1 c contentType: referenceInformation description: Uncertainty in the mean sea surface height over an ocean segment origname: h_uncrtn fullnamepath: /gt3r/ssh_segments/heights/h_uncrtn coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_h_var: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Variance of fit units: meters^2 source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. contentType: referenceInformation description: Variance in meters squared of the best fit probability density function. origname: h_var fullnamepath: /gt3r/ssh_segments/heights/h_var coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_ykurt: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: ykurt source: Ocean ATBD contentType: referenceInformation description: Excess Kurtosis = (fourth moment of Y)/ Yvar squared, all -3. The fourth moment of Y is calculated as the integral of Y(z) times z to the fourth, all divided by the integral of Y(z). units: 1 origname: ykurt fullnamepath: /gt3r/ssh_segments/heights/ykurt coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_ymean: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: ymean units: meters source: Ocean ATBD contentType: referenceInformation description: Mean (first moment of Y) calculated as the integral of Y(z) times z all divided by the integral of Y(z). This should be ~0 = h -meanoffit2 origname: ymean fullnamepath: /gt3r/ssh_segments/heights/ymean coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_swh: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: swh units: meters source: Ocean ATBD contentType: referenceInformation description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height origname: swh fullnamepath: /gt3r/ssh_segments/heights/swh coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_nbin10: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Number of 10m bins for the ocean segment units: counts source: Ocean ATBD contentType: referenceInformation description: Number of 10m bins for the ocean segment origname: nbin10 fullnamepath: /gt3r/ssh_segments/heights/nbin10 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_latbind: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average latitude for each 10m bin units: degrees north source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: referenceInformation description: Averages of latitudes in each 10-meter bin origname: latbind fullnamepath: /gt3r/ssh_segments/heights/latbind coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_xrbin: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m photon rate units: photons/meter source: Ocean ATBD valid_min: 0.000000000 valid_max: 600.0000000 contentType: referenceInformation description: The 10-m bin averaged photon rate from the SSB calculation for each ocean segment. origname: xrbin fullnamepath: /gt3r/ssh_segments/heights/xrbin coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_dxskew: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Skewness of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Skewness of distance between signal photons. origname: dxskew fullnamepath: /gt3r/ssh_segments/heights/dxskew coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_lonbind: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_xbin = 0..709] _FillValue: 1.7976931348623157e+308 long_name: Average longitude for each 10m bin units: degrees east source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 contentType: referenceInformation description: Averages of longitudes in each 10-meter bin origname: lonbind fullnamepath: /gt3r/ssh_segments/heights/lonbind coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_meanoffit2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Mean of Linear Fit units: meters source: Ocean ATBD Sect. 5.2.4 step G contentType: referenceInformation description: Average of the linear fit, P0+P1*X, where P0 and P1 are the coefficients of the linear fit to the initial choice of surface photons and X is the array of along-track positions of the final choice of surface photons origname: meanoffit2 fullnamepath: /gt3r/ssh_segments/heights/meanoffit2 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_mix_mu2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Mean of component 2 Gaussian mixture units: meters source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Mean of component 2 in 2-component Gaussian mixture origname: mix_mu2 fullnamepath: /gt3r/ssh_segments/heights/mix_mu2 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_l_scale: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Decorrelation scale units: 1 source: Ocean ATBD Sect. 5.3.6.1 contentType: referenceInformation description: Decorrelation scale origname: l_scale fullnamepath: /gt3r/ssh_segments/heights/l_scale coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_dxvar: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Variance of Dist Between Sig Photons units: meters source: Ocean ATBD contentType: referenceInformation description: Variance of distance between signal photons. origname: dxvar fullnamepath: /gt3r/ssh_segments/heights/dxvar coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_h: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: mean sea surface height units: meters source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 contentType: referenceInformation description: Mean sea surface height in meters, relative to the WGS84 ellipsoid, computed as the mean of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT plus the geoid and the mean removed in detrending the surface photon heights for analysis. origname: h fullnamepath: /gt3r/ssh_segments/heights/h coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_p1: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Slope of Linear Fit units: meters/meter source: Ocean ATBD contentType: referenceInformation description: Slope of linear fit versus along-track distance to surface photon height over the ocean origname: p1 fullnamepath: /gt3r/ssh_segments/heights/p1 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_htybin: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_xbin = 0..709] _FillValue: 3.402823466e+38 long_name: Average 10m height units: meters source: Ocean ATBD valid_min: -20.00000000 valid_max: 20.00000000 contentType: referenceInformation description: The 10-m bin averaged heights from the SSB calculation for each ocean segment. origname: htybin fullnamepath: /gt3r/ssh_segments/heights/htybin coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_mix_m1: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Fraction of component 1 Gaussian mixture units: 1 source: Ocean ATBD Sect. 5.2.6.2 step I. contentType: referenceInformation description: Fraction of component 1 in 2-component Gaussian mixture origname: mix_m1 fullnamepath: /gt3r/ssh_segments/heights/mix_m1 coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_heights_yskew: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Y skewness units: 1 source: Ocean ATBD contentType: referenceInformation description: Skewness = (third moment of Y) / Yvar to the 3/2 power. The third moment of Y is calculated as the integral of Y(z) times z cubed, all divided by the integral of Y(z). origname: yskew fullnamepath: /gt3r/ssh_segments/heights/yskew coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_first_geoseg: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] units: 1 long_name: First ATL03 Geo Segment ID source: Ocean ATBD contentType: referenceInformation description: The first of the geosegment ids (segment_id) for each ocean segment origname: first_geoseg fullnamepath: /gt3r/ssh_segments/stats/first_geoseg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_layer_flag_seg: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Layer Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The layer flag from ATL09 that is in effect over 50% of the ocean segment, 0 indicating absence of clouds and forward scattering, and 1 indicating possibility of forward scattering as in ATL09 origname: layer_flag_seg fullnamepath: /gt3r/ssh_segments/stats/layer_flag_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_pole_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Solid Earth Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). origname: tide_pole_seg fullnamepath: /gt3r/ssh_segments/stats/tide_pole_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_earth_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Earth Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of tide free system solid earth tides origname: tide_earth_seg fullnamepath: /gt3r/ssh_segments/stats/tide_earth_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_near_sat_fract_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Fraction Nearly Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were nearly saturated origname: near_sat_fract_seg fullnamepath: /gt3r/ssh_segments/stats/near_sat_fract_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_solar_elevation_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: solar elevation units: degrees source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the elevation of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive towards Up. The average is provided in degrees. origname: solar_elevation_seg fullnamepath: /gt3r/ssh_segments/stats/solar_elevation_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_geoid_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Geoid (Mean Tide System) units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of mean tide system geoid height above the WGS 84 reference ellipsoid (range -107 to 86 m). origname: geoid_seg fullnamepath: /gt3r/ssh_segments/stats/geoid_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_ss_corr_stdev: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Estimated error in ss_corr units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr_stdev fullnamepath: /gt3r/ssh_segments/stats/ss_corr_stdev coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_last_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Last PCE Major frame ID units: counts source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: Last Major Frame ID in the SSH segment origname: last_pce_mframe_cnt fullnamepath: /gt3r/ssh_segments/stats/last_pce_mframe_cnt coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_seg_dist_x_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Distance along-track units: meters source: Ocean ATBD contentType: referenceInformation description: Ocean segment average of the along-track distance from the equator crossing to the start of the 20-m geolocation segments included in the ocean segment origname: seg_dist_x_seg fullnamepath: /gt3r/ssh_segments/stats/seg_dist_x_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_podppd_flag_seg: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: PODPPD Flag units: 1 source: Ocean ATBD contentType: referenceInformation description: The higher of 0 or 4 of ATL03:/gtx/geolocation/podppd_flag of the data used in the ocean segment. origname: podppd_flag_seg fullnamepath: /gt3r/ssh_segments/stats/podppd_flag_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_fpb_corr: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: First photon bias correction units: meters source: Ocean ATBD contentType: referenceInformation description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean origname: fpb_corr fullnamepath: /gt3r/ssh_segments/stats/fpb_corr coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_ocean_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Ocean Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) origname: tide_ocean_seg fullnamepath: /gt3r/ssh_segments/stats/tide_ocean_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_fpb_corr_stdev: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] units: meters _FillValue: 3.402823466e+38 long_name: Estimated error in fpb_corr source: Ocean ATBD contentType: referenceInformation description: Estimated error in fpb_corr = 0 pending findings to the contrary origname: fpb_corr_stdev fullnamepath: /gt3r/ssh_segments/stats/fpb_corr_stdev coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_orbit_number: | Array of 16 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Orbit Number units: 1 source: ATL03 contentType: auxiliaryInformation description: Unique identifying number for each planned ICESat-2 orbit origname: orbit_number fullnamepath: /gt3r/ssh_segments/stats/orbit_number coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_full_sat_fract_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Fraction Fully Saturated units: 1 source: ATL03 contentType: referenceInformation description: Fraction of all pulses in all geosegs used that were fully saturated origname: full_sat_fract_seg fullnamepath: /gt3r/ssh_segments/stats/full_sat_fract_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_ice_conc: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Ice Concentration units: 1 source: Ocean ATBD contentType: referenceInformation description: The ice concentration at the average ocean segment position from NSIDC passive microwave data used for ATL07. origname: ice_conc fullnamepath: /gt3r/ssh_segments/stats/ice_conc coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_ref_azimuth_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Reference photon azimuth standard_name: azimuth units: radians source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of azimuth of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from North and positive towards East origname: ref_azimuth_seg fullnamepath: /gt3r/ssh_segments/stats/ref_azimuth_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_oc_pole_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Ocean Pole Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) origname: tide_oc_pole_seg fullnamepath: /gt3r/ssh_segments/stats/tide_oc_pole_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_surf_type_prcnt: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567][ds_surf_type = 0..4] long_name: Percent Surface Type units: 1 source: ATL03 contentType: referenceInformation description: Percent of each surface type (land, ocean, sea ice, land ice, inland water from masks) in the ocean segment origname: surf_type_prcnt fullnamepath: /gt3r/ssh_segments/stats/surf_type_prcnt coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_dac_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Dynamic Atmosphere Correction units: meters source: ATL03 contentType: referenceInformation description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect origname: dac_seg fullnamepath: /gt3r/ssh_segments/stats/dac_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_solar_azimuth_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: solar azimuth units: degrees_east source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of the azimuth of the sun position vector from the reference photon bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. The average is provided in degrees. origname: solar_azimuth_seg fullnamepath: /gt3r/ssh_segments/stats/solar_azimuth_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_earth_free2mean_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Earth Tide Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert solid earth tide from the tide-free system to the mean tide system. (Add to tide_earth to get solid earth tides in the mean-tide system.) origname: tide_earth_free2mean_seg fullnamepath: /gt3r/ssh_segments/stats/tide_earth_free2mean_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3r_ssh_segments_delta_time = 0..3567] units: counts long_name: First PCE Major frame ID source: l1a/atlas/pcex/altimeter/photons_s and photons_w contentType: referenceInformation description: First Major Frame ID in the SSH segment origname: first_pce_mframe_cnt fullnamepath: /gt3r/ssh_segments/stats/first_pce_mframe_cnt coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_last_geoseg: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Last ATL03 geo segment ID number. units: 1 source: ATL03 contentType: auxiliaryInformation description: A 7 digit number identifying the last along-track ATL03 geolocation segment number in the ocean height segment origname: last_geoseg fullnamepath: /gt3r/ssh_segments/stats/last_geoseg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_geoid_free2mean_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Geoid Free-to-Mean conversion units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average additive value to convert geoid heights from the tide-free system to the mean-tide system. (Subtract from geoid_seg to get the geoid heights in the free-tide system.) origname: geoid_free2mean_seg fullnamepath: /gt3r/ssh_segments/stats/geoid_free2mean_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_load_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Load Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) origname: tide_load_seg fullnamepath: /gt3r/ssh_segments/stats/tide_load_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_neutat_delay_total_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Total Neutral Atmospheric Delay units: meters source: ATL03 contentType: auxiliaryInformation description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) origname: neutat_delay_total_seg fullnamepath: /gt3r/ssh_segments/stats/neutat_delay_total_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_first_tx_pulse: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: First Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: First Transmit pulse ID in along-track segment origname: first_tx_pulse fullnamepath: /gt3r/ssh_segments/stats/first_tx_pulse coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_tide_equilibrium_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Equilibrium Tide units: meters source: ATL03 contentType: auxiliaryInformation description: Long period equilibrium tide self-consistent with ocean tide model (+-0.04m). origname: tide_equilibrium_seg fullnamepath: /gt3r/ssh_segments/stats/tide_equilibrium_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_cloudcover_percent_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Percent Cloudcover units: 1 source: Ocean ATBD contentType: referenceInformation description: The percentage of geosegs in the ocean segment with layer_flag=1 origname: cloudcover_percent_seg fullnamepath: /gt3r/ssh_segments/stats/cloudcover_percent_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_backgr_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: ATL03 background units: 1/meters source: Ocean ATBD contentType: referenceInformation description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment origname: backgr_seg fullnamepath: /gt3r/ssh_segments/stats/backgr_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_ss_corr: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: subsurface scattering correction units: meters source: Ocean ATBD contentType: referenceInformation description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary origname: ss_corr fullnamepath: /gt3r/ssh_segments/stats/ss_corr coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_last_tx_pulse: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..3567] long_name: Last Transmit Pulse units: counts source: Ocean ATBD contentType: referenceInformation description: Last Transmit pulse in along-track segment origname: last_tx_pulse fullnamepath: /gt3r/ssh_segments/stats/last_tx_pulse coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_photon_noise_rate: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Segment noise photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N contentType: referenceInformation description: The noise photon rate per meter, photon_noise_rate is equal to the difference of n_ttl_photon minus n_photons divided by length_seg. origname: photon_noise_rate fullnamepath: /gt3r/ssh_segments/stats/photon_noise_rate coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_photon_rate: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Photon count rate units: 1/meters source: Ocean ATBD Sect. 5.2.4 step N. contentType: referenceInformation description: Photon count rate, averaged over the segment origname: photon_rate fullnamepath: /gt3r/ssh_segments/stats/photon_rate coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_depth_ocn_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Ocean depth source: Ocean ATBD contentType: referenceInformation description: The average of depth_ocn of geo-segments used in the ocean segment units: meters origname: depth_ocn_seg fullnamepath: /gt3r/ssh_segments/stats/depth_ocn_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| gt3r_ssh_segments_stats_ref_elev_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] _FillValue: 3.402823466e+38 long_name: Reference photon elevation standard_name: elevation units: radians source: ATL03 contentType: referenceInformation description: Ocean segment average of elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from the East-North plane and positive towards Up origname: ref_elev_seg fullnamepath: /gt3r/ssh_segments/stats/ref_elev_seg coordinates: gt3r_ssh_segments_delta_time gt3r_ssh_segments_latitude gt3r_ssh_segments_longitude |
| ds_a: | Array of 32 bit Integers [ds_a = 0..64] long_name: Harmonic Coefficient Dimension Scale units: 1 source: Dim Scale contentType: auxiliaryInformation description: Dimension scale for harmonic coefficients. origname: ds_a fullnamepath: /ds_a |
| ds_surf_type: | Array of 32 bit Integers [ds_surf_type = 0..4] long_name: Surface Type Dimension Scale units: 1 source: Dim Scale valid_min: 1 valid_max: 5 contentType: auxiliaryInformation description: Dimension scale indexing the surface type array. Index=1 corresponds to Land; index = 2 corresponds to Ocean; Index = 3 corresponds to SeaIce; Index=4 corresponds to LandIce; Index=5 corresponds to InlandWater flag_meanings: land ocean seaice landice inland_water flag_values: 1, 2, 3, 4, 5 origname: ds_surf_type fullnamepath: /ds_surf_type |
| ds_wn: | Array of 32 bit Integers [ds_wn = 0..31] long_name: Wave Number Dimension Scale units: 1 source: Dim Scale contentType: auxiliaryInformation description: Dimension scale for wave numbers. origname: ds_wn fullnamepath: /ds_wn |
| ds_xbin: | Array of 32 bit Reals [ds_xbin = 0..709] long_name: 10m bin centers dimension scale units: meters source: Dim Scale valid_min: 0.000000000 valid_max: 7100.000000 contentType: auxiliaryInformation description: Center of 1 x 710 element array of 10-m bins. Note this may be included as a data description or other static array equal to [5, 15, 25, 35 ?.. 7095 m] origname: ds_xbin fullnamepath: /ds_xbin |
| ds_y_bincenters: | Array of 32 bit Reals [ds_y_bincenters = 0..3000] long_name: Dimension scale for Y bins center units: meters source: Dim Scale valid_min: -15.00000000 valid_max: 15.00000000 contentType: auxiliaryInformation description: Bin center values for the y histogram. Ranges -14.995 to 14.995 meters in 1 centimeter bin size steps. origname: ds_y_bincenters fullnamepath: /ds_y_bincenters |
| gt1l_ssh_segments_delta_time: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..20827] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt1l/ssh_segments/delta_time |
| gt1r_ssh_segments_delta_time: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3544] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt1r/ssh_segments/delta_time |
| gt2l_ssh_segments_delta_time: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..17312] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt2l/ssh_segments/delta_time |
| gt2r_ssh_segments_delta_time: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..3452] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt2r/ssh_segments/delta_time |
| gt3l_ssh_segments_delta_time: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..20325] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt3l/ssh_segments/delta_time |
| gt3r_ssh_segments_delta_time: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..3567] long_name: Elapsed GPS seconds standard_name: time units: seconds since 2018-01-01 source: telemetry contentType: referenceInformation description: Mean time for the ocean surface segment in number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: delta_time fullnamepath: /gt3r/ssh_segments/delta_time |
| orbit_info_crossing_time: | Array of 64 bit Reals [orbit_info_crossing_time = 0..3] long_name: Ascending Node Crossing Time standard_name: time units: seconds since 2018-01-01 source: POD/PPD contentType: referenceInformation description: The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: crossing_time fullnamepath: /orbit_info/crossing_time |
| orbit_info_sc_orient_time: | Array of 64 bit Reals [orbit_info_sc_orient_time = 0..0] long_name: Time of Last Spacecraft Orientation Change standard_name: time units: seconds since 2018-01-01 source: POD/PPD contentType: referenceInformation description: The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. origname: sc_orient_time fullnamepath: /orbit_info/sc_orient_time |
| quality_assessment_ds_lat_bincenters: | Array of 64 bit Reals [quality_assessment_ds_lat_bincenters = 0..17] long_name: Dimension scale for latitude bins center units: degrees north source: Dim Scale valid_min: -90.000000000000000 valid_max: 90.000000000000000 contentType: auxiliaryInformation description: Bin center values for the mean latitude bands. Ranges -85.0 to 85.0 degrees in 10 degree bin size steps. origname: ds_lat_bincenters fullnamepath: /quality_assessment/ds_lat_bincenters |
| FakeDim0: | Array of 32 bit Integers [FakeDim0 = 0..0] units: level |