| granule_type: | ATL13 |
| short_name: | ATL13 |
| level: | 3A |
| description: | This data set (ATL13) contains along track surface heights of inland water bodies, including lakes, estuaries and rivers. Water surface slope and descriptive statistics are also provided. The data were acquired by the Advanced Topographic Laser Altimeter S |
| 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/ATL13.001 |
| identifier_product_doi_authority: | http://dx.doi.org |
| identifier_product_type: | ATL13 |
| 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: | 2019-10-10T16:01:36.000000Z |
| hdfversion: | HDF5 1.10.3 |
| history: | 2019-10-10T16:01:36.000000Z;f9ce9365-de8f-3ea8-b744-93887d239290;Created by PGE atlas_l3a_iw Version 3.2 |
| identifier_file_uuid: | f9ce9365-de8f-3ea8-b744-93887d239290 |
| identifier_product_format_version: | 3.2 |
| 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: | -90.000000000000000 |
| geospatial_lon_min: | -180.00000000000000 |
| geospatial_lat_max: | 90.000000000000000 |
| geospatial_lon_max: | 180.00000000000000 |
| 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 Inland Water Surface Height |
| identifier_file_product_type: | ATL13 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| summary: | The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics. |
| keywords: | EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > NONE > 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: | gt1l_delta_time, gt1r_delta_time, gt2l_delta_time, gt2r_delta_time, gt3l_delta_time, gt3r_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_rgt: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt1r/rgt coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_bias_fit: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt1r/qf_bias_fit coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_sseg_mean_lon: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt1r/sseg_mean_lon coordinates: gt1r_delta_time |
| gt1r_qf_ice: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt1r/qf_ice coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_inland_water_body_type: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt1r/inland_water_body_type coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_inland_water_body_id: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt1r/inland_water_body_id coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_geoid: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt1r/segment_geoid coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_sseg_length: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt1r/qf_sseg_length coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_tide_equilibrium: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt1r/segment_tide_equilibrium coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_lseg_length: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt1r/qf_lseg_length coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_significant_wave_ht: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt1r/significant_wave_ht coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_water_depth: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt1r/water_depth coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_bias_em: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt1r/qf_bias_em coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_id_end: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt1r/segment_id_end coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_stdev_water_surf: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt1r/stdev_water_surf coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_iwp: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt1r/qf_iwp coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_id_beg: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt1r/segment_id_beg coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_cycle: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt1r/cycle coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_subsurf_anomaly: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt1r/qf_subsurf_anomaly coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_subsurface_attenuation: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt1r/subsurface_attenuation coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_inland_water_body_region: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt1r/inland_water_body_region coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_ice_flag: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt1r/ice_flag coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_lon: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt1r/segment_lon coordinates: gt1r_delta_time gt1r_segment_lat |
| gt1r_ht_ortho: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt1r/ht_ortho coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_lat: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt1r/segment_lat coordinates: gt1r_delta_time gt1r_segment_lon |
| gt1r_ht_water_surf: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt1r/ht_water_surf coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_err_ht_water_surf: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt1r/err_ht_water_surf coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_cloud: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt1r/qf_cloud coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_inland_water_body_source: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt1r/inland_water_body_source coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_inland_water_body_size: | Array of 16 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt1r/inland_water_body_size coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_tide_ocean: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt1r/segment_tide_ocean coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_err_slope_trk: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt1r/err_slope_trk coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_segment_slope_trk_bdy: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt1r/segment_slope_trk_bdy coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_sseg_mean_lat: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt1r/sseg_mean_lat coordinates: gt1r_delta_time |
| gt1r_qf_spec_width: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt1r/qf_spec_width coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_qf_bckgrd: | Array of 32 bit Integers [gt1r_delta_time = 0..24321] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt1r/qf_bckgrd coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt1r_sseg_mean_time: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt1r/sseg_mean_time coordinates: gt1r_delta_time |
| gt1r_segment_dac: | Array of 32 bit Reals [gt1r_delta_time = 0..24321] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt1r/segment_dac coordinates: gt1r_delta_time gt1r_segment_lat gt1r_segment_lon |
| gt2r_rgt: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt2r/rgt coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_bias_fit: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt2r/qf_bias_fit coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_sseg_mean_lon: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt2r/sseg_mean_lon coordinates: gt2r_delta_time |
| gt2r_qf_ice: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt2r/qf_ice coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_inland_water_body_type: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt2r/inland_water_body_type coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_inland_water_body_id: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt2r/inland_water_body_id coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_geoid: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt2r/segment_geoid coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_sseg_length: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt2r/qf_sseg_length coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_tide_equilibrium: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt2r/segment_tide_equilibrium coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_lseg_length: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt2r/qf_lseg_length coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_significant_wave_ht: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt2r/significant_wave_ht coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_water_depth: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt2r/water_depth coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_bias_em: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt2r/qf_bias_em coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_id_end: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt2r/segment_id_end coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_stdev_water_surf: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt2r/stdev_water_surf coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_iwp: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt2r/qf_iwp coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_id_beg: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt2r/segment_id_beg coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_cycle: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt2r/cycle coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_subsurf_anomaly: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt2r/qf_subsurf_anomaly coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_subsurface_attenuation: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt2r/subsurface_attenuation coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_inland_water_body_region: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt2r/inland_water_body_region coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_ice_flag: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt2r/ice_flag coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_lon: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt2r/segment_lon coordinates: gt2r_delta_time gt2r_segment_lat |
| gt2r_ht_ortho: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt2r/ht_ortho coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_lat: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt2r/segment_lat coordinates: gt2r_delta_time gt2r_segment_lon |
| gt2r_ht_water_surf: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt2r/ht_water_surf coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_err_ht_water_surf: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt2r/err_ht_water_surf coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_cloud: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt2r/qf_cloud coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_inland_water_body_source: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt2r/inland_water_body_source coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_inland_water_body_size: | Array of 16 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt2r/inland_water_body_size coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_tide_ocean: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt2r/segment_tide_ocean coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_err_slope_trk: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt2r/err_slope_trk coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_segment_slope_trk_bdy: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt2r/segment_slope_trk_bdy coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_sseg_mean_lat: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt2r/sseg_mean_lat coordinates: gt2r_delta_time |
| gt2r_qf_spec_width: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt2r/qf_spec_width coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_qf_bckgrd: | Array of 32 bit Integers [gt2r_delta_time = 0..24345] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt2r/qf_bckgrd coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt2r_sseg_mean_time: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt2r/sseg_mean_time coordinates: gt2r_delta_time |
| gt2r_segment_dac: | Array of 32 bit Reals [gt2r_delta_time = 0..24345] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt2r/segment_dac coordinates: gt2r_delta_time gt2r_segment_lat gt2r_segment_lon |
| gt1l_rgt: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt1l/rgt coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_bias_fit: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt1l/qf_bias_fit coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_sseg_mean_lon: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt1l/sseg_mean_lon coordinates: gt1l_delta_time |
| gt1l_qf_ice: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt1l/qf_ice coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_inland_water_body_type: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt1l/inland_water_body_type coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_inland_water_body_id: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt1l/inland_water_body_id coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_geoid: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt1l/segment_geoid coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_sseg_length: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt1l/qf_sseg_length coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_tide_equilibrium: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt1l/segment_tide_equilibrium coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_lseg_length: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt1l/qf_lseg_length coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_significant_wave_ht: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt1l/significant_wave_ht coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_water_depth: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt1l/water_depth coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_bias_em: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt1l/qf_bias_em coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_id_end: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt1l/segment_id_end coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_stdev_water_surf: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt1l/stdev_water_surf coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_iwp: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt1l/qf_iwp coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_id_beg: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt1l/segment_id_beg coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_cycle: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt1l/cycle coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_subsurf_anomaly: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt1l/qf_subsurf_anomaly coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_subsurface_attenuation: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt1l/subsurface_attenuation coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_inland_water_body_region: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt1l/inland_water_body_region coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_ice_flag: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt1l/ice_flag coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_lon: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt1l/segment_lon coordinates: gt1l_delta_time gt1l_segment_lat |
| gt1l_ht_ortho: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt1l/ht_ortho coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_lat: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt1l/segment_lat coordinates: gt1l_delta_time gt1l_segment_lon |
| gt1l_ht_water_surf: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt1l/ht_water_surf coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_err_ht_water_surf: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt1l/err_ht_water_surf coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_cloud: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt1l/qf_cloud coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_inland_water_body_source: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt1l/inland_water_body_source coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_inland_water_body_size: | Array of 16 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt1l/inland_water_body_size coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_tide_ocean: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt1l/segment_tide_ocean coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_err_slope_trk: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt1l/err_slope_trk coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_segment_slope_trk_bdy: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt1l/segment_slope_trk_bdy coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_sseg_mean_lat: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt1l/sseg_mean_lat coordinates: gt1l_delta_time |
| gt1l_qf_spec_width: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt1l/qf_spec_width coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_qf_bckgrd: | Array of 32 bit Integers [gt1l_delta_time = 0..122160] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt1l/qf_bckgrd coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| gt1l_sseg_mean_time: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt1l/sseg_mean_time coordinates: gt1l_delta_time |
| gt1l_segment_dac: | Array of 32 bit Reals [gt1l_delta_time = 0..122160] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt1l/segment_dac coordinates: gt1l_delta_time gt1l_segment_lat gt1l_segment_lon |
| 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 failure; 2=insufficient data; 3=TBD3; 4=TBD4; 5=TBD5 source: Operations flag_meanings: no_failure processing_failure insufficient_data TBD3 TBD4 TBD5 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_rgt: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt3l/rgt coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_bias_fit: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt3l/qf_bias_fit coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_sseg_mean_lon: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt3l/sseg_mean_lon coordinates: gt3l_delta_time |
| gt3l_qf_ice: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt3l/qf_ice coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_inland_water_body_type: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt3l/inland_water_body_type coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_inland_water_body_id: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt3l/inland_water_body_id coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_geoid: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt3l/segment_geoid coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_sseg_length: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt3l/qf_sseg_length coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_tide_equilibrium: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt3l/segment_tide_equilibrium coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_lseg_length: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt3l/qf_lseg_length coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_significant_wave_ht: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt3l/significant_wave_ht coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_water_depth: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt3l/water_depth coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_bias_em: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt3l/qf_bias_em coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_id_end: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt3l/segment_id_end coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_stdev_water_surf: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt3l/stdev_water_surf coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_iwp: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt3l/qf_iwp coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_id_beg: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt3l/segment_id_beg coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_cycle: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt3l/cycle coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_subsurf_anomaly: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt3l/qf_subsurf_anomaly coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_subsurface_attenuation: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt3l/subsurface_attenuation coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_inland_water_body_region: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt3l/inland_water_body_region coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_ice_flag: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt3l/ice_flag coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_lon: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt3l/segment_lon coordinates: gt3l_delta_time gt3l_segment_lat |
| gt3l_ht_ortho: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt3l/ht_ortho coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_lat: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt3l/segment_lat coordinates: gt3l_delta_time gt3l_segment_lon |
| gt3l_ht_water_surf: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt3l/ht_water_surf coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_err_ht_water_surf: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt3l/err_ht_water_surf coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_cloud: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt3l/qf_cloud coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_inland_water_body_source: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt3l/inland_water_body_source coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_inland_water_body_size: | Array of 16 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt3l/inland_water_body_size coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_tide_ocean: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt3l/segment_tide_ocean coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_err_slope_trk: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt3l/err_slope_trk coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_segment_slope_trk_bdy: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt3l/segment_slope_trk_bdy coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_sseg_mean_lat: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt3l/sseg_mean_lat coordinates: gt3l_delta_time |
| gt3l_qf_spec_width: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt3l/qf_spec_width coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_qf_bckgrd: | Array of 32 bit Integers [gt3l_delta_time = 0..121656] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt3l/qf_bckgrd coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt3l_sseg_mean_time: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt3l/sseg_mean_time coordinates: gt3l_delta_time |
| gt3l_segment_dac: | Array of 32 bit Reals [gt3l_delta_time = 0..121656] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt3l/segment_dac coordinates: gt3l_delta_time gt3l_segment_lat gt3l_segment_lon |
| gt2l_rgt: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt2l/rgt coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_bias_fit: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt2l/qf_bias_fit coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_sseg_mean_lon: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt2l/sseg_mean_lon coordinates: gt2l_delta_time |
| gt2l_qf_ice: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt2l/qf_ice coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_inland_water_body_type: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt2l/inland_water_body_type coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_inland_water_body_id: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt2l/inland_water_body_id coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_geoid: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt2l/segment_geoid coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_sseg_length: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt2l/qf_sseg_length coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_tide_equilibrium: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt2l/segment_tide_equilibrium coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_lseg_length: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt2l/qf_lseg_length coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_significant_wave_ht: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt2l/significant_wave_ht coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_water_depth: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt2l/water_depth coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_bias_em: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt2l/qf_bias_em coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_id_end: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt2l/segment_id_end coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_stdev_water_surf: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt2l/stdev_water_surf coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_iwp: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt2l/qf_iwp coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_id_beg: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt2l/segment_id_beg coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_cycle: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt2l/cycle coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_subsurf_anomaly: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt2l/qf_subsurf_anomaly coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_subsurface_attenuation: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt2l/subsurface_attenuation coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_inland_water_body_region: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt2l/inland_water_body_region coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_ice_flag: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt2l/ice_flag coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_lon: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt2l/segment_lon coordinates: gt2l_delta_time gt2l_segment_lat |
| gt2l_ht_ortho: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt2l/ht_ortho coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_lat: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt2l/segment_lat coordinates: gt2l_delta_time gt2l_segment_lon |
| gt2l_ht_water_surf: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt2l/ht_water_surf coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_err_ht_water_surf: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt2l/err_ht_water_surf coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_cloud: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt2l/qf_cloud coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_inland_water_body_source: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt2l/inland_water_body_source coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_inland_water_body_size: | Array of 16 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt2l/inland_water_body_size coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_tide_ocean: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt2l/segment_tide_ocean coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_err_slope_trk: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt2l/err_slope_trk coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_segment_slope_trk_bdy: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt2l/segment_slope_trk_bdy coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_sseg_mean_lat: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt2l/sseg_mean_lat coordinates: gt2l_delta_time |
| gt2l_qf_spec_width: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt2l/qf_spec_width coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_qf_bckgrd: | Array of 32 bit Integers [gt2l_delta_time = 0..103274] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt2l/qf_bckgrd coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| gt2l_sseg_mean_time: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt2l/sseg_mean_time coordinates: gt2l_delta_time |
| gt2l_segment_dac: | Array of 32 bit Reals [gt2l_delta_time = 0..103274] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt2l/segment_dac coordinates: gt2l_delta_time gt2l_segment_lat gt2l_segment_lon |
| 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_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_inland_water_atm_window2: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: ATM Background Window Top description: Upper limit of height above coarse water surface height for atmospheric background count calculation. source: ATBD Table 5-2 origname: atm_window2 fullnamepath: /ancillary_data/inland_water/atm_window2 |
| ancillary_data_inland_water_b1_sseg1: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Small Segment Bin Size description: Bin size to be used for histogramming of each small segment. source: ATBD Table 5-2 origname: b1_sseg1 fullnamepath: /ancillary_data/inland_water/b1_sseg1 |
| ancillary_data_inland_water_s_seg1: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Short Segment Length description: Short segment size, operationally used as unit length over which to identify water surface height anomalies such as islands, bridges, etc. source: ATBD Table 5-2 origname: s_seg1 fullnamepath: /ancillary_data/inland_water/s_seg1 |
| ancillary_data_inland_water_detrend_width: | Array of 32 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Detrend Width description: Number of standard deviations +/- mode to include in detrend band. source: ATBD Table 5-2 origname: detrend_width fullnamepath: /ancillary_data/inland_water/detrend_width |
| ancillary_data_inland_water_sub_max: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Subsurf Max Vertical Profile description: Maximum vertical profile of water subsurface to include in estimation of subsurface characteristics source: ATBD Table 5-2 origname: sub_max fullnamepath: /ancillary_data/inland_water/sub_max |
| ancillary_data_inland_water_ref_dist_iw_bdy: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Reference Difference description: Maximum distance from a water body that a geosegment reference photon indicates the need for overlap testing each individual photon in the geosegment source: ATBD Table 5-2 origname: ref_dist_iw_bdy fullnamepath: /ancillary_data/inland_water/ref_dist_iw_bdy |
| ancillary_data_inland_water_sseg_mode_freq_test: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Short Segment Mode Frequency Test description: Threshold to test number of short segment histogram modes against for inclusion or exclusion of short segment. source: ATBD Table 5-2 origname: sseg_mode_freq_test fullnamepath: /ancillary_data/inland_water/sseg_mode_freq_test |
| ancillary_data_inland_water_type_to_process: | Array of 16 bit Integers [FakeDim1 = 0..8] _FillValue: 127 units: 1 long_name: Type to Process description: Water body types that are to be processed by the ATL13 algorithm. This parameter is a rank 1 array of extent 9, with the body type digits coinciding with the array subscripts 1 through 9. Array elements are binary values, if 0 then process body type, 1 otherwise. Water body types are described in ATL13 chapter 4.7.1.2 and in Table 5-4. source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 flag_meanings: process_type otherwise flag_values: 0, 1 valid_min: 0 valid_max: 1 contentType: auxiliaryInformation origname: type_to_process fullnamepath: /ancillary_data/inland_water/type_to_process |
| ancillary_data_inland_water_sig_threshold: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Signal Confidence Threshold description: Minimum signal confidence required for photon to be included in analysis source: ATBD Table 5-2 origname: sig_threshold fullnamepath: /ancillary_data/inland_water/sig_threshold |
| ancillary_data_inland_water_size_to_process: | Array of 16 bit Integers [FakeDim1 = 0..8][FakeDim3 = 0..8] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Size to Process description: Water body sizes that are to be processed by the ATL13 algorithm for each water body type. This parameter is a rank 2 array of size 9x9, where array subscripts 1 through 9, coincide with body type digits along columns, and body size digits along rows. Array elements are binary values, if 0 then process body size for that type, 1 otherwise. Water body sizes are described in ATL13 chapter 4.7.1.2 and in Table 5-4. source: ATL13 ATBD, Section 4.7.1.2, Table 5-4 flag_meanings: process_size otherwise flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: size_to_process fullnamepath: /ancillary_data/inland_water/size_to_process |
| ancillary_data_inland_water_gauss_pk_thres: | Array of 32 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Gaussian Peak Threshold description: Fraction of the peak amplitude above which Gaussian fit error analysis is executed (ie, calculate error on Gaussian only between the peak amplitude and gauss_pk_thres * peak) source: ATBD Table 5-2 origname: gauss_pk_thres fullnamepath: /ancillary_data/inland_water/gauss_pk_thres |
| ancillary_data_inland_water_sseg_mode_cnt_test: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Short Segment Mode Count Test description: Threshold to test number of values contained in short segment histogram multimodes against for inclusion or exclusion of short segment source: ATBD Table 5-2 origname: sseg_mode_cnt_test fullnamepath: /ancillary_data/inland_water/sseg_mode_cnt_test |
| ancillary_data_inland_water_shore_buffer: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Shore Buffer description: Number of near-shore short segments to ignore in analysis due to near-shore influences. source: ATBD Table 5-2 origname: shore_buffer fullnamepath: /ancillary_data/inland_water/shore_buffer |
| ancillary_data_inland_water_h_mavg_c: | Array of 32 bit Integers [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Num Depth Bins C description: Number of bins over which to calculate moving average source: ATBD Table 5-2 origname: h_mavg_c fullnamepath: /ancillary_data/inland_water/h_mavg_c |
| ancillary_data_inland_water_bckgrd_threshold: | Array of 32 bit Reals [FakeDim4 = 0..1] units: counts/sec contentType: auxiliaryInformation long_name: Background Threshold description: Thresholds outside of which computed background is flagged (High, Low). source: ATBD Table 5-2 origname: bckgrd_threshold fullnamepath: /ancillary_data/inland_water/bckgrd_threshold |
| ancillary_data_inland_water_f2_d_min: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Minimum Distance Thres description: Minimum distance threshold between photons required for inclusion in algorithm. source: ATBD Table 5-2 origname: f2_d_min fullnamepath: /ancillary_data/inland_water/f2_d_min |
| ancillary_data_inland_water_max_gseg_search: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Max Geoseg Search Radius description: Maximum number of geosegments in either direction to search for reported water surface heights source: ATBD Table 5-2 origname: max_gseg_search fullnamepath: /ancillary_data/inland_water/max_gseg_search |
| ancillary_data_inland_water_sseg_length_test: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Short Segment Length Test description: Threshold by which to test the length of a short segment to determine if it is anomalous or not anomalous. source: ATBD Table 5-2 origname: sseg_length_test fullnamepath: /ancillary_data/inland_water/sseg_length_test |
| ancillary_data_inland_water_h_mavg_a: | Array of 32 bit Integers [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Num Depth Bins A description: Number of depth bins over which to compute H_mavg_a source: ATBD Table 5-2 origname: h_mavg_a fullnamepath: /ancillary_data/inland_water/h_mavg_a |
| ancillary_data_inland_water_signal_window_bottom: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Signal Window Bottom description: Lower limit below coarse water surface to include photons for analysis. source: ATBD Table 5-2 origname: signal_window_bottom fullnamepath: /ancillary_data/inland_water/signal_window_bottom |
| ancillary_data_inland_water_c_fresnel: | Array of 32 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Fresnel Coeff description: Fresnel specular reflection coefficient @ 532 nm source: ATBD Table 5-2 origname: c_fresnel fullnamepath: /ancillary_data/inland_water/c_fresnel |
| ancillary_data_inland_water_sseg_mode_spread_test: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Short Segment Mode Spread Test description: Threshold to test distance between short segment histogram multimodes against for inclusion or exclusion of short segment. source: ATBD Table 5-2 origname: sseg_mode_spread_test fullnamepath: /ancillary_data/inland_water/sseg_mode_spread_test |
| ancillary_data_inland_water_anmly_test: | Array of 32 bit Reals [FakeDim5 = 0..3] units: meters contentType: auxiliaryInformation long_name: Anomaly Test description: Array containing threshold values against which to test segments for anomalous changes in height. The mode of each segment histogram will be tested against ht_water_coarse and excluded if the difference is greater than the value associated with the segment source: ATBD Table 5-2 origname: anmly_test fullnamepath: /ancillary_data/inland_water/anmly_test |
| ancillary_data_inland_water_c_adj: | Array of 32 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation description: Adjustment for the speed of light through water (cl) source: ATBD Table 5-2 long_name: C Adjustment origname: c_adj fullnamepath: /ancillary_data/inland_water/c_adj |
| ancillary_data_inland_water_h_mavg_b: | Array of 32 bit Integers [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Num Depth Bins B description: Number of depth bins over which to compute H_mavg_b source: ATBD Table 5-2 origname: h_mavg_b fullnamepath: /ancillary_data/inland_water/h_mavg_b |
| ancillary_data_inland_water_b_long: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Long Bin Size description: Bin size to be used by which to establish a histogram of long segments. source: ATBD Table 5-2 origname: b_long fullnamepath: /ancillary_data/inland_water/b_long |
| ancillary_data_inland_water_bin_detrend: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Detrend Bin Size description: Bin size used to establish a band of heights over which to determine the detrending equation. source: ATBD Table 5-2 origname: bin_detrend fullnamepath: /ancillary_data/inland_water/bin_detrend |
| ancillary_data_inland_water_atm_window1: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: ATM Background Window Bottom description: Lower limit of height above coarse water surface height for atmospheric background count calculation. source: ATBD Table 5-2 origname: atm_window1 fullnamepath: /ancillary_data/inland_water/atm_window1 |
| ancillary_data_inland_water_m_avg_d: | Array of 32 bit Integers [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Num Depth Bins D description: Number of depth bins over which to compute P_ht_long_subsurf_mavg source: ATBD Table 5-2 origname: m_avg_d fullnamepath: /ancillary_data/inland_water/m_avg_d |
| ancillary_data_inland_water_l_surf: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Long Surface Segment Size description: Long segment size, operationally used as unit length over which to detrend the water surface, characterize the surface, and deconvolve the instrument pulse and subsurface effects from the water surface response. source: ATBD Table 5-2 origname: l_surf fullnamepath: /ancillary_data/inland_water/l_surf |
| ancillary_data_inland_water_signal_window_top: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Signal Window Top description: Upper limit above coarse water surface to include photons for analysis. source: ATBD Table 5-2 origname: signal_window_top fullnamepath: /ancillary_data/inland_water/signal_window_top |
| ancillary_data_inland_water_lsbr_threshold: | Array of 32 bit Reals [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: LSBR Threshold description: Threshold at which the LSBR indicates a significant transition from signal photon richness to noise. source: ATBD Table 5-2 origname: lsbr_threshold fullnamepath: /ancillary_data/inland_water/lsbr_threshold |
| ancillary_data_inland_water_l_sub: | Array of 32 bit Integers [FakeDim0 = 0..0] units: 1 contentType: auxiliaryInformation long_name: Long Subsurface Segment Size description: Long segment size, operationally used as unit length over which to characterize the subsurface, and deconvolve the instrument pulse and subsurface effects from the water surface response. source: ATBD Table 5-2 origname: l_sub fullnamepath: /ancillary_data/inland_water/l_sub |
| ancillary_data_inland_water_b2_sseg1: | Array of 32 bit Reals [FakeDim0 = 0..0] units: meters contentType: auxiliaryInformation long_name: Small Segment Height Bin Size description: Bin size to be used for histogramming of small segment heights. source: ATBD Table 5-2 origname: b2_sseg1 fullnamepath: /ancillary_data/inland_water/b2_sseg1 |
| 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_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_rgt: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] 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: ATL03 valid_min: 1 valid_max: 1387 origname: rgt fullnamepath: /gt3r/rgt coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_bias_fit: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Height Bias Fit Quality Flag description: The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_fit fullnamepath: /gt3r/qf_bias_fit coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_sseg_mean_lon: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] units: degrees_east contentType: auxiliaryInformation long_name: Short Segment Mean Longitude description: Mean longitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: sseg_mean_lon fullnamepath: /gt3r/sseg_mean_lon coordinates: gt3r_delta_time |
| gt3r_qf_ice: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Ice Quality Flag description: The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1) source: Inland Water ATBD flag_meanings: qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_ice fullnamepath: /gt3r/qf_ice coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_inland_water_body_type: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Type description: Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_type fullnamepath: /gt3r/inland_water_body_type coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_inland_water_body_id: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] contentType: referenceInformation long_name: Body ID description: Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value. source: ATL13 ATBD, Section 5.3.1 (C) _FillValue: 2147483647 units: 1 origname: inland_water_body_id fullnamepath: /gt3r/inland_water_body_id coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_geoid: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Geoid description: Applicable geoid value at reporting location for all short segment statistics. source: ATL03 origname: segment_geoid fullnamepath: /gt3r/segment_geoid coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_sseg_length: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Short Segment Length flag description: The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_sseg_length fullnamepath: /gt3r/qf_sseg_length coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_tide_equilibrium: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Equilibrium description: Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_equilibrium fullnamepath: /gt3r/segment_tide_equilibrium coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_lseg_length: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Long Segment Length flag description: The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 above_threshold4 flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 origname: qf_lseg_length fullnamepath: /gt3r/qf_lseg_length coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_significant_wave_ht: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] contentType: physicalMeasurement long_name: SWH description: Significant wave height source: section 5.3.3 (C) _FillValue: 3.402823466e+38 units: meters origname: significant_wave_ht fullnamepath: /gt3r/significant_wave_ht coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_water_depth: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Water Depth description: Depth from the mean water surface to detected bottom. source: IW ATBD Section 5.3.4(A) origname: water_depth fullnamepath: /gt3r/water_depth coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_bias_em: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: EM Bias Quality Flag description: The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid. source: Inland Water ATBD flag_meanings: below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid flag_values: -3, -2, -1, 0, 1, 2, 3, 4 valid_min: -3 valid_max: 4 origname: qf_bias_em fullnamepath: /gt3r/qf_bias_em coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_id_end: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] units: 1 contentType: referenceInformation long_name: Last ATL03 Segment ID description: Last ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_end fullnamepath: /gt3r/segment_id_end coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_stdev_water_surf: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Surface StDev description: Standard deviation of water surface, calculated over long segments with result reported at each short segment location tag contained within. source: section 5.3.3 (C) origname: stdev_water_surf fullnamepath: /gt3r/stdev_water_surf coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_iwp: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 contentType: qualityInformation long_name: Inland Water Segment Processing Flag description: Inland Water segment Processing (IWP) flag to describe the level of processing the inland water algorithm was able to perform on each short segment based on the data available, ranging from 1 to 7. source: Inland Water ATBD flag_meanings: 1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments 30_or_more_short_segments_analyzed flag_values: 1, 2, 3, 4, 5, 6, 7 valid_min: 1 valid_max: 7 origname: qf_iwp fullnamepath: /gt3r/qf_iwp coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_id_beg: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] units: 1 contentType: referenceInformation long_name: First ATL03 Segment ID description: First ATL03 segment_id associated with the photons within this inland water segment. source: ATL03 origname: segment_id_beg fullnamepath: /gt3r/segment_id_beg coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_cycle: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] units: counts contentType: referenceInformation long_name: Cycle Number description: Tracks the number of 91-day cycles in the mission, beginning with 01. source: ATL03 valid_min: 0 valid_max: 50 origname: cycle fullnamepath: /gt3r/cycle coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_subsurf_anomaly: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Subsurface Anomaly Quality Flag description: Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected source: Inland Water ATBD 5.3.4(A) flag_meanings: bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly flag_values: 1, 2, 3 valid_min: 1 valid_max: 3 origname: qf_subsurf_anomaly fullnamepath: /gt3r/qf_subsurf_anomaly coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_subsurface_attenuation: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Subsurface Attenuation description: Subsurface attenuation coefficient. source: section 5.3.4 (A) origname: subsurface_attenuation fullnamepath: /gt3r/subsurface_attenuation coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_inland_water_body_region: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: referenceInformation long_name: Body Region description: ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest. source: section 5.3.1 (A) origname: inland_water_body_region fullnamepath: /gt3r/inland_water_body_region coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_ice_flag: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] units: 1 contentType: qualityInformation long_name: Ice Flag description: Flag indicating significant existence of ice on the water surface source: section 5.3.2 (D) flag_meanings: no_ice ice flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: ice_flag fullnamepath: /gt3r/ice_flag coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_lon: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] units: degrees_east contentType: physicalMeasurement long_name: Longitude standard_name: longitude description: Longitude of reporting location source: section 5.3.5 (A) valid_min: -180.00000000000000 valid_max: 180.00000000000000 origname: segment_lon fullnamepath: /gt3r/segment_lon coordinates: gt3r_delta_time gt3r_segment_lat |
| gt3r_ht_ortho: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Orthometric Height description: Orthometric height EGM2008 converted from ellipsoidal height. source: section 5.3.5 (A) origname: ht_ortho fullnamepath: /gt3r/ht_ortho coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_lat: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] units: degrees_north contentType: physicalMeasurement long_name: Latitude standard_name: latitude description: Latitude of reporting location source: section 5.3.5 (A) valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: segment_lat fullnamepath: /gt3r/segment_lat coordinates: gt3r_delta_time gt3r_segment_lon |
| gt3r_ht_water_surf: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: physicalMeasurement long_name: Water Surface Height description: Water surface height with reference to WGS84 ellipsoid source: section 5.3.5 (A) origname: ht_water_surf fullnamepath: /gt3r/ht_water_surf coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_err_ht_water_surf: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Height Error description: Error included in heights reported in ht_water_surf. source: section 5.3.3 (C) origname: err_ht_water_surf fullnamepath: /gt3r/err_ht_water_surf coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_cloud: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Consolidated cloud flag description: This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time. source: ATL09 flag_meanings: likely_clear likely_cloudy flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_cloud fullnamepath: /gt3r/qf_cloud coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_inland_water_body_source: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Source description: Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Reserved, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Reserved Reserved Reserved Reserved Reserved flag_values: 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 1 valid_max: 9 origname: inland_water_body_source fullnamepath: /gt3r/inland_water_body_source coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_inland_water_body_size: | Array of 16 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 127 units: 1 contentType: auxiliaryInformation long_name: Body Size description: Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved source: ATL13 ATBD, Section 5.3.1 (C) flag_meanings: Not_Assigned A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 valid_min: 0 valid_max: 9 origname: inland_water_body_size fullnamepath: /gt3r/inland_water_body_size coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_tide_ocean: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment Tide Ocean description: Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATL03 origname: segment_tide_ocean fullnamepath: /gt3r/segment_tide_ocean coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_err_slope_trk: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: 1 contentType: qualityInformation long_name: Slope Error description: Error included in segment_slope_trk_local. source: section 5.3.3 (C) origname: err_slope_trk fullnamepath: /gt3r/err_slope_trk coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_segment_slope_trk_bdy: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: 1 contentType: physicalMeasurement long_name: Water Body Slope description: Along track water body surface slope. source: section 5.3.5 (A) origname: segment_slope_trk_bdy fullnamepath: /gt3r/segment_slope_trk_bdy coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_sseg_mean_lat: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 1.7976931348623157e+308 units: degrees_north contentType: auxiliaryInformation long_name: Short Segment Mean Latitude description: Mean latitude of the signal-qualified photons in a short segment. source: Inland Water ATBD valid_min: -90.000000000000000 valid_max: 90.000000000000000 origname: sseg_mean_lat fullnamepath: /gt3r/sseg_mean_lat coordinates: gt3r_delta_time |
| gt3r_qf_spec_width: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Spectral Width Flag description: The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5. source: Inland Water ATBD flag_meanings: below_0.5 above_0.5 flag_values: 0, 1 valid_min: 0 valid_max: 1 origname: qf_spec_width fullnamepath: /gt3r/qf_spec_width coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_qf_bckgrd: | Array of 32 bit Integers [gt3r_delta_time = 0..24584] _FillValue: 2147483647 units: 1 contentType: qualityInformation long_name: Background Quality Flag description: Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg) source: Inland Water ATBD flag_meanings: equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6 flag_values: 0, 1, 2, 3, 4, 5, 6 valid_min: 0 valid_max: 6 origname: qf_bckgrd fullnamepath: /gt3r/qf_bckgrd coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt3r_sseg_mean_time: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 1.7976931348623157e+308 units: Seconds since 2018-01-01 contentType: auxiliaryInformation long_name: Short Segment Mean Time description: Mean time of the signal-qualified photons in a short segment. source: Inland Water ATBD origname: sseg_mean_time fullnamepath: /gt3r/sseg_mean_time coordinates: gt3r_delta_time |
| gt3r_segment_dac: | Array of 32 bit Reals [gt3r_delta_time = 0..24584] _FillValue: 3.402823466e+38 units: meters contentType: auxiliaryInformation long_name: Segment DAC description: Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion. source: ATBD Section 5.3.5A origname: segment_dac fullnamepath: /gt3r/segment_dac coordinates: gt3r_delta_time gt3r_segment_lat gt3r_segment_lon |
| gt1l_delta_time: | Array of 64 bit Reals [gt1l_delta_time = 0..122160] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt1l/delta_time |
| gt1r_delta_time: | Array of 64 bit Reals [gt1r_delta_time = 0..24321] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt1r/delta_time |
| gt2l_delta_time: | Array of 64 bit Reals [gt2l_delta_time = 0..103274] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt2l/delta_time |
| gt2r_delta_time: | Array of 64 bit Reals [gt2r_delta_time = 0..24345] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt2r/delta_time |
| gt3l_delta_time: | Array of 64 bit Reals [gt3l_delta_time = 0..121656] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt3l/delta_time |
| gt3r_delta_time: | Array of 64 bit Reals [gt3r_delta_time = 0..24584] units: seconds since 2018-01-01 contentType: physicalMeasurement long_name: Delta Time standard_name: time description: 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: ATL03 coordinates: segment_lat segment_lon origname: delta_time fullnamepath: /gt3r/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 |
| FakeDim1: | Array of 32 bit Integers [FakeDim1 = 0..8] units: level |
| FakeDim3: | Array of 32 bit Integers [FakeDim3 = 0..8] units: level |
| FakeDim4: | Array of 32 bit Integers [FakeDim4 = 0..1] units: level |
| FakeDim5: | Array of 32 bit Integers [FakeDim5 = 0..3] units: level |