ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data Quick Look, Version 7
Data set id:
ATL13QL
DOI: 10.5067/ATLAS/ATL13QL.007
This is the most recent version of these data.
Version Summary
Version Summary
-Introduced parameters to allow for limiting of mode identification to above a certain depth to avoid bright subsurface signal to overwhelm local surface mode.
-Reduced sseg signal photon aggregation requirement for small lake/reservoirs, removed instrument effects from all analysis based on photon quality flag, and refined long segment bathymetry results for each member short segment based on its individual photon distribution.
-Made mirroring criteria water body type dependent & added apply_mirror parameter to control which types undergo mirroring processing.
-Added minimum number of photons required where downscaling long segment bathymetry to short segment scale.
-Added sseg_length and sseg_dist_from_eq to output
-Reversed 0/1 on/off assignments used for apply_mirror and limit_hist_depth arrays to match convention used for previous parameters.
-Added an improved methodology for identifying bathymetry that couples density thresholds with examination of photon distribution in the water column, controllable by water body type.
-Added apparent standard deviation to the non-anomalous short segment output.
-Updated min mirror cnt for coastal water bodies.
-Reduced sseg signal photon aggregation requirement for small lake/reservoirs, removed instrument effects from all analysis based on photon quality flag, and refined long segment bathymetry results for each member short segment based on its individual photon distribution.
-Made mirroring criteria water body type dependent & added apply_mirror parameter to control which types undergo mirroring processing.
-Added minimum number of photons required where downscaling long segment bathymetry to short segment scale.
-Added sseg_length and sseg_dist_from_eq to output
-Reversed 0/1 on/off assignments used for apply_mirror and limit_hist_depth arrays to match convention used for previous parameters.
-Added an improved methodology for identifying bathymetry that couples density thresholds with examination of photon distribution in the water column, controllable by water body type.
-Added apparent standard deviation to the non-anomalous short segment output.
-Updated min mirror cnt for coastal water bodies.
Overview
ATL13QL is the quick look version of ATL13 and is based on the same algorithms that generate the ATL13 final data products. Once final ATL13 files are available, the corresponding ATL13QL files are removed. ATL13QL provides along-track surface water products for inland water bodies, defined as lakes, reservoirs, bays, estuaries, rivers, and a 7 km near-shore buffer. Data parameters include surface water height statistics and related parameters including significant wave height, transect slope, subsurface signal attenuation, and shallow water bathymetry. Water surface heights are provided as both orthometric height and height referencing the WGS84 ellipsoid.
Parameter(s):
SURFACE WATER FEATURES
Platform(s):
ICESat-2
Sensor(s):
ATLAS
Data Format(s):
HDF5
Temporal Coverage:
- 1 June 2025 to present
Temporal Resolution:
- 91 day
Spatial Resolution:
- Not Specified
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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