ATLAS/ICESat-2 L3B Mean Inland Surface Water Data, Version 4
Data set id:
ATL22
DOI: 10.5067/ATLAS/ATL22.004
This is the most recent version of these data.
Version Summary
Version Summary
-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
-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
Overview
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).
Parameter(s):
SURFACE WATER PROCESSES/MEASUREMENTS
Platform(s):
ICESat-2
Sensor(s):
ATLAS
Data Format(s):
HDF5
Temporal Coverage:
- 14 October 2018 to present
Temporal Resolution:
- 91 day
Spatial Resolution:
- varies
- varies
Spatial Reference System(s):
- WGS 84EPSG:4326
Spatial Coverage:
- N:88S:-88E:180W:-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
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