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Description

ATL22 includes the per-beam mean surface water height, mean surface height standard deviation, and mean ATLAS 532 nm attenuation coefficient over a water body transect, reported at the center of the beam transect. Additional parameters include the beginning and end of the transect, transect length, and center of transect. ATL22 is derived from ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data (ATL13).

Version Description

-Version 4 of this data set was derived from ATL13 v7.
-Added calculation and output of transect mean maximum likelihood alpha
-Added sseg_length and sseg dist_from _eq
-Calculated the along-track observed linear slope and accompanying root mean squared error
-Defined process for fitting heights during along-track slope calculation
-Added detrend-based along-track mean slope and ATL13 orthometric height distribution skew and kurtosis
-Turned on calculation of along-track slope for lakes and reservoirs; added language for exclusion of invalid values in mean slope calculatio
-Added transect mean azimuth calculation and output; reversed 0/1 on/off assignments used for along_trk slope_calc array to match convention used for previous parameters
-For skewness and kurtosis calculations, added minimum filtered short segment requirements, controls based on water body type, and clarification to use bias-corrected results
-Turned on calculation of linear fit along-track slope for rivers

Product Summary

Platforms
ICESat-2
Instruments
ATLAS
Spatial Extent

N: 88 S: -88 E: 180 W: -180

Geographic Region
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2018-10-14 to Present
Concept ID
C3824617301-NSIDC_CPRD
Data State
ACTIVE
Number of Files/Granules
2475
Processing Level
3
Published
Science Keywords
Surface Water Processes/Measurements

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.

Copy Citation

Jasinski, M., Stoll, J., Hancock, D., Robbins, J., & Nattala, J. (2025). ATLAS/ICESat-2 L3B Mean Inland Surface Water Data, Version 4 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL22.004 Date Accessed: 2026-01-10

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