N: 90 S: -90 E: 180 W: -180
TABLE OF CONTENTS
Description
The data set (ATL07) contains along-track heights for sea ice and open water leads (at varying length scales) relative to the WGS84 ellipsoid (ITRF2014 reference frame) after adjustment for geoidal and tidal variations, and inverted barometer effects. Height statistics and apparent reflectance are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
Version Description
The parameters "tep_used_gt1_strong", "tep_used_gt1_weak", "tep_used_gt3_strong", and "tep_used_gt3_weak" (in /ancillary_data/fine_surface_finding/) are now filled with a value which shows which TEP was used (beam_3 or beam_5) to create the waveform table for the corresponding beam; The code now uses sea level pressure from ATL09 (instead of surface pressure), smoothed by averaging over 8 seconds; The default value for the number of photons collected for a fine track segment ( /ancillary_data/fine_surface_finding/n_s) has been updated to 150; The apparent surface reflectance (ASR) and background computations have been updated to use the proper return sensitivity value; The equilibrium tide is now read from ATL03, and values are averaged over a sea ice segment and written to the geophysical group; The code has been updated to use the equilibrium tide when there is a valid ocean tide correction to the photon heights.
Product Summary
Platforms
Instruments
Spatial Extent
Spatial Reference System(s)
WGS 84 (EPSG:4326)
Location
NORTHERN HEMISPHERE
,
SOUTHERN HEMISPHERE
Coordinate System
CARTESIAN
Granule Spatial Representation
ORBIT
Temporal Extent
2018-10-14 to 2019-11-15
Temporal Resolution
91 Day
Concept ID
C4112411185-NSIDC_CPRD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
3
Published
Science Keywords
Sea Ice Elevation
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Kwok, R., Cunningham, G., Markus, T., Hancock, D., Morison, J., Palm, S., Farrell, S., Ivanoff, A., Wimert, J., & the ICESat-2 Science Team. (2019). ATLAS/ICESat-2 L3A Sea Ice Height, Version 2 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL07.002 Date Accessed: 2026-06-17
Kwok, R., Cunningham, G., Markus, T., Hancock, D., Morison, J., Palm, S., Farrell, S., Ivanoff, A., Wimert, J., & the ICESat-2 Science Team. (2019). ATLAS/ICESat-2 L3A Sea Ice Height, Version 2 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL07.002 Date Accessed: 2026-06-17
Kwok, Ron, et al. “ATLAS/ICESat-2 L3A Sea Ice Height, Version 2.” NASA National Snow and Ice Data Center Distributed Active Archive Center, 2019, https://doi.org/10.5067/ATLAS/ATL07.002. Date Accessed: 2026-06-17
TABLE OF CONTENTS