| granule_type: | ATL12 |
| short_name: | ATL12 |
| level: | 3A |
| description: | Sea Surface Height (SSH) of the global open ocean including the ice-free seasonal ice zone (SIZ) and near-coast regions. |
| contributor_name: | Thomas E 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 |
| Conventions: | CF-1.6 |
| date_type: | UTC |
| featureType: | trajectory |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_units: | degrees_east |
| 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: | 2019-06-30T16:00:26.000000Z |
| hdfversion: | HDF5 1.10.3 |
| history: | 2019-06-30T16:00:26.000000Z;8e509dec-3e24-330c-a024-1d58465e28f3;Created by PGE atlas_l3a_oc Version 4.1 |
| identifier_file_uuid: | 8e509dec-3e24-330c-a024-1d58465e28f3 |
| identifier_product_format_version: | 2.0 |
| 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: | -77.088097758132463 |
| geospatial_lon_min: | -121.44336785099746 |
| geospatial_lat_max: | 88.040480905988332 |
| geospatial_lon_max: | 153.03550549569738 |
| 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_y_bins, 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 |
| orbit_info_cycle_number: | Array of 16 bit Integers [orbit_info_crossing_time = 0..3] units: 1 contentType: referenceInformation long_name: Cycle Number description: A count of the number of exact repeats of this reference orbit. source: Operations valid_min: 0 valid_max: 50 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] units: 1 contentType: referenceInformation long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit. source: Operations valid_min: 1 valid_max: 65000 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] units: degrees_east contentType: referenceInformation long_name: Ascending Node Longitude description: Longitude at the ascending node crossing. source: POD/PPD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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] units: 1 contentType: referenceInformation long_name: Spacecraft Orientation 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. source: POD/PPD flag_meanings: backward forward transition flag_values: 0, 1, 2 valid_min: 0 valid_max: 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] units: 1 contentType: referenceInformation long_name: Reference Ground track 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. source: POD/PPD valid_min: 1 valid_max: 1387 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..3463] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..3463] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..3463] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..3463] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..3463][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..3463] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..3463] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..3463] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..3463] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..3463] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..3463] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..3463] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..3463] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..3463] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..3463] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt1r/ssh_segments/heights/slope_seg 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..3463] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..3463] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..3463] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..3463] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..3463] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..3463] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..3463] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..3463] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..3463][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1r_ssh_segments_delta_time = 0..3463] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt1r_ssh_segments_delta_time = 0..3463] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt1r/ssh_segments/stats/segment_id 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..3463] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..3463] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..3463] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..3463] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt1r_ssh_segments_delta_time = 0..3463] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt1r/ssh_segments/stats/photonns_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..3463] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..3463] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..3463] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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..2809] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..2809] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..2809] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..2809] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2809][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2809] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2809] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..2809] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..2809] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..2809] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..2809] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..2809] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..2809] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..2809] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..2809] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt2r/ssh_segments/heights/slope_seg 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..2809] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2809] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..2809] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..2809] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..2809] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..2809] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..2809] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..2809] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..2809][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2r_ssh_segments_delta_time = 0..2809] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt2r_ssh_segments_delta_time = 0..2809] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt2r/ssh_segments/stats/segment_id 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..2809] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..2809] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..2809] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..2809] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt2r_ssh_segments_delta_time = 0..2809] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt2r/ssh_segments/stats/photonns_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..2809] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..2809] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..2809] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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..15957] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..15957] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..15957] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..15957] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..15957][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..15957] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..15957] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..15957] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..15957] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..15957] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..15957] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..15957] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..15957] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..15957] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..15957] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt1l/ssh_segments/heights/slope_seg 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..15957] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..15957] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..15957] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..15957] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..15957] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..15957] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..15957] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..15957] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..15957][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt1l_ssh_segments_delta_time = 0..15957] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt1l_ssh_segments_delta_time = 0..15957] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt1l/ssh_segments/stats/segment_id 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..15957] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..15957] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..15957] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..15957] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt1l/ssh_segments/stats/photonns_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..15957] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..15957] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..15957] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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_qa_granule_fail_reason: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: qualityInformation long_name: Granule Failure Reason 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. source: Operations flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE flag_values: 0, 1, 2, 3, 4, 5 valid_min: 0 valid_max: 5 origname: qa_granule_fail_reason fullnamepath: /quality_assessment/qa_granule_fail_reason |
| quality_assessment_qa_granule_pass_fail: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: qualityInformation long_name: Granule Pass Flag description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. source: Operations flag_meanings: PASS FAIL flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qa_granule_pass_fail fullnamepath: /quality_assessment/qa_granule_pass_fail |
| gt3l_ssh_segments_delt_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..16917] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..16917] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..16917] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..16917][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..16917] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..16917] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..16917] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..16917] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..16917] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..16917] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..16917] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..16917] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..16917] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..16917] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt3l/ssh_segments/heights/slope_seg 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..16917] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..16917] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..16917] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..16917] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..16917] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..16917] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..16917] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..16917] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..16917][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3l_ssh_segments_delta_time = 0..16917] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt3l_ssh_segments_delta_time = 0..16917] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt3l/ssh_segments/stats/segment_id 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..16917] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..16917] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..16917] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..16917] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt3l_ssh_segments_delta_time = 0..16917] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt3l/ssh_segments/stats/photonns_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..16917] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..16917] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..16917] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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..13927] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..13927] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..13927] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..13927] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..13927][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..13927] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..13927] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..13927] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..13927] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..13927] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..13927] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..13927] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..13927] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..13927] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..13927] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt2l/ssh_segments/heights/slope_seg 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..13927] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..13927] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..13927] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..13927] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..13927] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..13927] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..13927] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..13927] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..13927][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt2l_ssh_segments_delta_time = 0..13927] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt2l_ssh_segments_delta_time = 0..13927] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt2l/ssh_segments/stats/segment_id 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..13927] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..13927] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..13927] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..13927] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt2l_ssh_segments_delta_time = 0..13927] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt2l/ssh_segments/stats/photonns_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..13927] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..13927] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..13927] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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] units: 1 contentType: auxiliaryInformation long_name: Release Number 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. source: Operations origname: release fullnamepath: /ancillary_data/release |
| ancillary_data_end_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ending Geolocation Segment 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. source: Derived origname: end_geoseg fullnamepath: /ancillary_data/end_geoseg |
| ancillary_data_version: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Version 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. source: Operations origname: version fullnamepath: /ancillary_data/version |
| ancillary_data_end_region: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ending Region 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. source: Derived origname: end_region fullnamepath: /ancillary_data/end_region |
| ancillary_data_atlas_sdp_gps_epoch: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds since 1980-01-06T00:00:00.000000Z contentType: auxiliaryInformation long_name: ATLAS Epoch Offset 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. source: Operations origname: atlas_sdp_gps_epoch fullnamepath: /ancillary_data/atlas_sdp_gps_epoch |
| ancillary_data_end_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ending Reference Groundtrack 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. source: Derived valid_min: 1 valid_max: 1387 origname: end_rgt fullnamepath: /ancillary_data/end_rgt |
| ancillary_data_end_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds since 2018-01-01 contentType: auxiliaryInformation long_name: ATLAS End Time (Actual) standard_name: time 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. source: Derived origname: end_delta_time fullnamepath: /ancillary_data/end_delta_time |
| ancillary_data_end_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ending Orbit Number 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. source: Derived origname: end_orbit fullnamepath: /ancillary_data/end_orbit |
| ancillary_data_start_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Starting Cycle 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. source: Derived valid_min: 0 valid_max: 99 origname: start_cycle fullnamepath: /ancillary_data/start_cycle |
| ancillary_data_data_end_utc: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: End UTC Time of Granule (CCSDS-A, Actual) description: UTC (in CCSDS-A format) of the last data point within the granule. source: Derived origname: data_end_utc fullnamepath: /ancillary_data/data_end_utc |
| ancillary_data_control: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Control File description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. source: Operations origname: control fullnamepath: /ancillary_data/control |
| ancillary_data_start_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds contentType: auxiliaryInformation long_name: Start GPS SOW of Granule (Actual) description: GPS seconds-of-week of the first data point in the granule. source: Derived origname: start_gpssow fullnamepath: /ancillary_data/start_gpssow |
| ancillary_data_granule_end_utc: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: End UTC Time of Granule (CCSDS-A, Requested) description: Requested end time (in UTC CCSDS-A) of this granule. source: Derived origname: granule_end_utc fullnamepath: /ancillary_data/granule_end_utc |
| ancillary_data_end_cycle: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ending Cycle 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. source: Derived valid_min: 0 valid_max: 99 origname: end_cycle fullnamepath: /ancillary_data/end_cycle |
| ancillary_data_ocean_ocseg_min_sig: | Array of 32 bit Integers [FakeDim0 = 0..0] units: counts contentType: auxiliaryInformation long_name: Ocean Segment Minimum Signal Photons description: Minimum number of signal photons required to process an ocean segment. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: ocseg_min_sig fullnamepath: /ancillary_data/ocean/ocseg_min_sig |
| ancillary_data_ocean_fine_max_secs: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds contentType: auxiliaryInformation long_name: Maximum Integration Time description: Maximum fine segment duration of fine selection segment (equivalent to required number of tx pulses). source: Operations origname: fine_max_secs fullnamepath: /ancillary_data/ocean/fine_max_secs |
| ancillary_data_ocean_sig_thres: | Array of 32 bit Reals [FakeDim0 = 0..0] units: percent contentType: auxiliaryInformation long_name: Signal Threshold description: Threshold for photons to be considered signal. source: Operations origname: sig_thres fullnamepath: /ancillary_data/ocean/sig_thres |
| ancillary_data_ocean_fine_min_sig: | Array of 32 bit Integers [FakeDim0 = 0..0] units: counts contentType: auxiliaryInformation long_name: Minimum Signal Photons 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] units: meters contentType: auxiliaryInformation long_name: Histogram Bottom description: Bottom (minimum height) of the coarse and fine select histograms. source: Operations origname: hist_bot fullnamepath: /ancillary_data/ocean/hist_bot |
| ancillary_data_ocean_hist_bin_size: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation description: Height histogram and impulse response bin size in meters. source: Operations long_name: Histogram Bin Size origname: hist_bin_size fullnamepath: /ancillary_data/ocean/hist_bin_size |
| ancillary_data_ocean_cld_thres: | Array of 32 bit Reals [FakeDim0 = 0..0] units: percent contentType: auxiliaryInformation long_name: Cloud Threshold description: Data associated with cloud percentages above this threshold are not processed. source: Operations origname: cld_thres fullnamepath: /ancillary_data/ocean/cld_thres |
| ancillary_data_ocean_hist_top: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Histogram Top description: Top (maximum height) of the coarse and fine select histograms. source: Operations origname: hist_top fullnamepath: /ancillary_data/ocean/hist_top |
| ancillary_data_ocean_hist_nbins: | Array of 32 bit Integers [FakeDim0 = 0..0] units: counts contentType: auxiliaryInformation long_name: Number of histogram bins. description: Number of bins in each histogram. source: Derived origname: hist_nbins fullnamepath: /ancillary_data/ocean/hist_nbins |
| ancillary_data_ocean_proc_interval: | Array of 32 bit Integers [FakeDim0 = 0..0] units: counts contentType: auxiliaryInformation long_name: Processing interval description: The number of 20 meter segments read at once from ATL03. source: Operations origname: proc_interval fullnamepath: /ancillary_data/ocean/proc_interval |
| ancillary_data_ocean_min_ph_pcnt: | Array of 32 bit Reals [FakeDim0 = 0..0] units: percent contentType: auxiliaryInformation description: Minimum percentage of the selected coarse photons being selected in fine_sel to continue processing. source: Operations long_name: Minimum Photon Percentage origname: min_ph_pcnt fullnamepath: /ancillary_data/ocean/min_ph_pcnt |
| ancillary_data_ocean_oc_region: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Ocean Region Index description: The ocean region covered within this granule. source: Operations origname: oc_region fullnamepath: /ancillary_data/ocean/oc_region |
| ancillary_data_ocean_coarse_interval: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds contentType: auxiliaryInformation long_name: Coarse selection interval description: The number of seconds of data used for coarse selection (normally equivalent to 400 laser pulses). source: Operations origname: coarse_interval fullnamepath: /ancillary_data/ocean/coarse_interval |
| ancillary_data_granule_start_utc: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Start UTC Time of Granule (CCSDS-A, Requested) description: Requested start time (in UTC CCSDS-A) of this granule. source: Derived origname: granule_start_utc fullnamepath: /ancillary_data/granule_start_utc |
| ancillary_data_start_delta_time: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds since 2018-01-01 contentType: auxiliaryInformation long_name: ATLAS Start Time (Actual) standard_name: time 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. source: Derived origname: start_delta_time fullnamepath: /ancillary_data/start_delta_time |
| ancillary_data_start_geoseg: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Starting Geolocation Segment 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. source: Derived origname: start_geoseg fullnamepath: /ancillary_data/start_geoseg |
| ancillary_data_start_orbit: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Starting Orbit Number 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. source: Derived origname: start_orbit fullnamepath: /ancillary_data/start_orbit |
| ancillary_data_data_start_utc: | Array of Strings [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Start UTC Time of Granule (CCSDS-A, Actual) description: UTC (in CCSDS-A format) of the first data point within the granule. source: Derived origname: data_start_utc fullnamepath: /ancillary_data/data_start_utc |
| ancillary_data_end_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] units: weeks from 1980-01-06 contentType: auxiliaryInformation long_name: Ending GPSWeek of Granule (Actual) description: GPS week number of the last data point in the granule. source: Derived origname: end_gpsweek fullnamepath: /ancillary_data/end_gpsweek |
| ancillary_data_start_rgt: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Starting Reference Groundtrack 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. source: Derived valid_min: 1 valid_max: 1387 origname: start_rgt fullnamepath: /ancillary_data/start_rgt |
| ancillary_data_end_gpssow: | Array of 64 bit Reals [FakeDim0 = 0..0] units: seconds contentType: auxiliaryInformation long_name: Ending GPS SOW of Granule (Actual) description: GPS seconds-of-week of the last data point in the granule. source: Derived origname: end_gpssow fullnamepath: /ancillary_data/end_gpssow |
| ancillary_data_qa_at_interval: | Array of 64 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: QA Along-Track Interval description: Statistics time interval for along-track QA data. source: control origname: qa_at_interval fullnamepath: /ancillary_data/qa_at_interval |
| ancillary_data_start_region: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Starting Region 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. source: Derived origname: start_region fullnamepath: /ancillary_data/start_region |
| ancillary_data_start_gpsweek: | Array of 32 bit Integers [FakeDim0 = 0..0] units: weeks from 1980-01-06 contentType: auxiliaryInformation long_name: Start GPSWeek of Granule (Actual) description: GPS week number of the first data point in the granule. source: Derived origname: start_gpsweek fullnamepath: /ancillary_data/start_gpsweek |
| gt3r_ssh_segments_delt_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: seconds contentType: referenceInformation long_name: Ocean Segment Duration description: Time duration segment source: Ocean ATBD Sect. 5.2.4 step N. 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..2734] units: degrees_east contentType: referenceInformation long_name: Mean longitude of surface segment standard_name: longitude description: Mean longitude of surface photons in segment source: Ocean ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 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..2734] units: degrees_north contentType: referenceInformation long_name: Mean latitude of surface segment standard_name: latitude description: Mean latitude of surface photons in segment source: Ocean ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 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..2734] units: meters contentType: referenceInformation long_name: Mean of component 1 Gaussian mixture description: Mean of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2734][ds_y_bins = 0..2999] units: 1/meter contentType: referenceInformation long_name: PDF of Height description: Probability density function of photon surface height source: Ocean ATBD 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_mix_sig2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters contentType: referenceInformation long_name: Standard deviation of component 2 Gaussian mixture description: Standard deviation of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2734] units: 1 contentType: referenceInformation long_name: Fraction of component 2 Gaussian mixture description: Fraction of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2734] units: meters contentType: referenceInformation long_name: Sea State Bias description: Mean of linear fit removed from surface photon height (4.3.1) source: Ocean ATBD 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..2734] units: 1 contentType: referenceInformation long_name: Skewness of sea surface height description: Skewness of photon sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 23 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..2734] units: meters contentType: referenceInformation long_name: Standard deviation of component 1 Gaussian mixture description: Standard deviation of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_n_pulse_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: counts contentType: referenceInformation long_name: Number laser pulses segment description: Number of laser pulses in segment source: Ocean ATBD 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_length_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters contentType: referenceInformation long_name: Length of segment description: Length of segment (m) source: Ocean ATBD Sect. 5.2.4 step N. 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..2734] units: meters contentType: referenceInformation long_name: Intercept of Linear Fit description: Zero intercept of the linear fit used to detrend the photon heights before going into the second round of surface finding source: Ocean ATBD 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..2734] units: 1 contentType: referenceInformation long_name: kurtosis of sea surface height description: Excess kurtosis of sea surface height of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 24. 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_yvar: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meter^2 contentType: referenceInformation long_name: yvar description: Variance= second moment of Y calculated as the integral of Y(z) times z squared, all divided by the integral of Y(z). source: Ocean ATBD 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_var: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters^2 contentType: referenceInformation long_name: Variance of fit description: Variance in meters squared of the distribution represented as an optimum 2-Gaussian mixture fit to the DOT. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 22. 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..2734] units: 1 contentType: referenceInformation long_name: ykurt 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). source: Ocean ATBD 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..2734] units: meters contentType: referenceInformation long_name: ymean 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 source: Ocean ATBD 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..2734] units: meters contentType: referenceInformation long_name: swh description: Significant wave height estimated as 4 times the standard deviation of along track 10-m bin averaged surface height source: Ocean ATBD 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_meanoffit2: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters contentType: referenceInformation long_name: coarse Sea surface height of segment 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 source: Ocean ATBD Sect. 5.2.4 step G 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..2734] units: meters contentType: referenceInformation long_name: Mean of component 2 Gaussian mixture description: Mean of component 2 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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_h: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters contentType: referenceInformation long_name: mean sea surface height description: Mean sea surface height in meters 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. source: Ocean ATBD Sect. 5.2.6.2 step I, equation 21 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_slope_seg: | Array of 64 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: meters/meters contentType: referenceInformation long_name: Sea surface slope of segment description: Sea surface slope equal to the linear coefficient , P1, of the linear fit used to detrend the photon heights before going into the second round of surface finding. source: Ocean ATBD Sect. 5.2.6.2 step I.Sect. 5.2.4 step G origname: slope_seg fullnamepath: /gt3r/ssh_segments/heights/slope_seg 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..2734] units: meters/meter contentType: referenceInformation long_name: Slope of Linear Fit description: Slope of linear fit versus along-track distance to surface photon height source: Ocean ATBD 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_mix_m1: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: 1 contentType: referenceInformation long_name: Fraction of component 1 Gaussian mixture description: Fraction of component 1 in 2-component Gaussian mixture source: Ocean ATBD Sect. 5.2.6.2 step I. 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..2734] units: 1 contentType: referenceInformation long_name: yskew 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). source: Ocean ATBD 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..2734] units: 1 contentType: referenceInformation long_name: ATL03 Geolocation Segment description: The first of the geosegment ids (segment_id) for each ocean segment source: Ocean ATBD 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..2734] units: 1 contentType: referenceInformation long_name: Layer Flag 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 source: Ocean ATBD 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Solid Earth Pole Tide description: Solid Earth Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Earth Tide description: Ocean segment average of solid earth tides source: ATL03 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_solar_elevation_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] _FillValue: 3.402823466e+38 units: degrees long_name: solar elevation 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. source: ATL03 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..2734] long_name: Geoid _FillValue: 3.402823466e+38 units: meters description: Ocean segment average of geoid height above the WGS – 84 reference ellipsoid (range -107 to 86 m) source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: ss_corr_stdev description: Estimated error of subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..2734] units: counts contentType: referenceInformation long_name: Last PCE Major frame ID description: Last Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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..2734] units: meters contentType: referenceInformation long_name: Distance along-track 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 source: Ocean ATBD 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_fpb_corr: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: first photon bias correction description: Estimated first-photon bias correction to mean segment height = 0 pending findings to the contrary for the ocean source: Ocean ATBD 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Tide description: Ocean segment average of ocean tides including diurnal and semi-diurnal (harmonic analysis) and longer period tides (dynamic and self-consistent equilibrium) source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: fpb_corr_stdev description: Estimated error in fpb_corr = 0 pending findings to the contrary source: Ocean ATBD 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..2734] units: 1 long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit source: ATL03 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_ref_azimuth_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] _FillValue: 3.402823466e+38 units: radians long_name: Azimuth standard_name: azimuth 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 source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Ocean Pole Tide description: Ocean segment average of oceanic surface rotational deformation due to polar motion (-2 to +2 mm) source: ATL03 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..2734][ds_surf_type = 0..4] units: 1 contentType: referenceInformation long_name: Surface Type description: Percent of each surface type (land, ocean, land ice, sea ice, inland water from masks) in the ocean segment source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Dynamic Atmosphere Correction description: Ocean segment average of dynamic atmospheric correction (DAC) includes inverted barometer (IB) affect source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: degrees_east long_name: solar azimuth 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. source: ATL03 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_first_pce_mframe_cnt: | Array of 32 bit Unsigned integers [gt3r_ssh_segments_delta_time = 0..2734] units: counts contentType: referenceInformation long_name: First PCE Major frame ID description: First Major Frame ID in the SSH segment source: l1a/atlas/pcex/altimeter/photons_s and photons_w 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_segment_id: | Array of 32 bit Integers [gt3r_ssh_segments_delta_time = 0..2734] units: 1 long_name: ATL03 geolocation segment ID number. description: A 7 digit number identifying the first along-track ATL03 geolocation segment number in the ocean height segment source: ATL03 origname: segment_id fullnamepath: /gt3r/ssh_segments/stats/segment_id 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Load Tide description: Ocean segment average of local displacement due to ocean loading (-6 to 0 cm) source: ATL03 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..2734] _FillValue: 3.402823466e+38 units: meters long_name: Total Neutral Atmospheric Delay description: Ocean segment average of total neutral atmosphere delay correction (wet + dry) source: ATL03 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..2734] units: counts contentType: referenceInformation long_name: First Transmit Pulse description: First Transmit pulse in along-track segment source: Ocean ATBD 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_backgr_seg: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] _FillValue: 3.402823466e+38 units: 1/meters contentType: referenceInformation long_name: ATL03 background description: backgrd_atlas/bckgrd_rate from ATL03 averaged over the segment source: Ocean ATBD 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..2734] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: subsurface scattering correction description: Subsurface scattering correction, placeholder = zero pending further findings to the contrary source: Ocean ATBD 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..2734] units: counts contentType: referenceInformation long_name: Last Transmit Pulse description: Last Transmit pulse in along-track segment source: Ocean ATBD 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_photonns_rate: | Array of 32 bit Reals [gt3r_ssh_segments_delta_time = 0..2734] units: 1/meters contentType: referenceInformation long_name: Noise photon count rate, averaged over the segment description: Noise photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N.Sect. 5.2.4 step N origname: photonns_rate fullnamepath: /gt3r/ssh_segments/stats/photonns_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..2734] units: 1/meters contentType: referenceInformation long_name: Photon count rate, averaged over the segment description: Photon count rate, averaged over the segment source: Ocean ATBD Sect. 5.2.4 step N. 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..2734] units: meters contentType: referenceInformation long_name: Ocean depth description: The average of depth_ocn of geo-segments used in the ocean segment source: Ocean ATBD 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..2734] _FillValue: 3.402823466e+38 units: radians long_name: elevation standard_name: elevation 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 source: ATL03 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_surf_type: | Array of 32 bit Integers [ds_surf_type = 0..4] units: 1 contentType: auxiliaryInformation long_name: Surface Type Dimension Scale 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 valid_min: 1 valid_max: 5 origname: ds_surf_type fullnamepath: /ds_surf_type |
| ds_y_bins: | Array of 32 bit Reals [ds_y_bins = 0..2999] units: meters contentType: auxiliaryInformation long_name: Dimension Scale for Y description: Bin values for the y histogram. origname: ds_y_bins fullnamepath: /ds_y_bins |
| gt1l_ssh_segments_delta_time: | Array of 64 bit Reals [gt1l_ssh_segments_delta_time = 0..15957] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry 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..3463] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry 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..13927] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry 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..2809] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry 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..16917] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry 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..2734] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: telemetry origname: delta_time fullnamepath: /gt3r/ssh_segments/delta_time |
| orbit_info_crossing_time: | Array of 64 bit Reals [orbit_info_crossing_time = 0..3] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Ascending Node Crossing Time standard_name: time 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. source: POD/PPD 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] units: seconds since 2018-01-01 contentType: referenceInformation long_name: Time of Last Spacecraft Orientation Change standard_name: time 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. source: POD/PPD origname: sc_orient_time fullnamepath: /orbit_info/sc_orient_time |
| FakeDim0: | Array of 32 bit Integers [FakeDim0 = 0..0] units: level |