• On Wednesday, June 12 from 9:00 a.m. to 12:00 p.m. (US Mountain Time), the following data collections may not be available due to a planned system maintenance: ASO, AMSR Unified, AMSR-E, Aquarius, High Mountain Asia, IceBridge, ICESat/GLAS, ICESat-2, LVIS, MEaSUREs, MODIS, Nimbus, SMAP, SnowEx, SSM/I-SSMIS and VIIRS. Users of the SMAP near real-time products should use the NASA LANCE HTTPS File System for data access. 

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  • The ICESat-2 Quick Look data sets are currently experiencing delays beyond the nominal 3-day latency. High solar activity caused ICESat-2 to enter Safe Mode, leading to delays and data gaps. Recovery of the system is expected to start on 16 May 2024 and will take several days to complete. We apologize for any inconvenience this may cause.

ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data Quick Look, Version 6
Data set id:
DOI: 10.5067/ATLAS/ATL13QL.006
This is the most recent version of these data.
Version Summary
Changes for Version 6 are as follows:

  • Modified the computations of the deconvolution of subsurface backscatter profile and deconvolution of surface water profile

  • Expanded iteration range of subsurface parameters within deconvolution scheme and added quality flags

  • Added surface quality flags

  • Defined end of partial short segments as the final signal photon

  • To avoid inadvertently capturing subsurface photons associated with bottom reflection and machine error, such photons are further screened and removed from processing using a mirroring approach applied to the water surface

  • Replaced “crossing-number” algorithm with “winding number” algorithm for better determination of ICESat-2 transects within the inland water mask shapes


ATL13QL is the quick look version of ATL13. Once final ATL13 files are available the corresponding ATL13QL files will be removed. ATL13 contains along-track surface water products for inland water bodies. Inland water bodies include lakes, reservoirs, rivers, bays, estuaries and a 7 km near-shore buffer. Principal data products include the along-track water surface height and standard deviation, subsurface signal (532 nm) attenuation, significant wave height, wind speed, and coarse depth to bottom topography (where data permit).
Data Format(s):
Temporal Coverage:
27 December 2023 to present
Temporal Resolution:
  • 91 day
Spatial Resolution:
  • Not Specified
Spatial Reference System(s):
WGS 84
Spatial Coverage:
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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Read this help article to learn about what ICESat-2 quick look data products are and how to find them.
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