Data Set ID: 
ATL12

ATLAS/ICESat-2 L3A Ocean Surface Height, Version 5

This data set (ATL12) contains along-track sea surface heights at variable length scales over cloud-free regions. Estimates of height distributions, surface roughness, surface slope, 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.

This is the most recent version of these data.

Version Summary: 

Changes for this version include:

  • Implemented derivation of ice concentration, ice_conc, from Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration and added ice concentration, gtx/ssh_segments/stats/ice_conc., to ATL12 Outputs.
  • Added specification of which values of the podppd_flag the ATL12 data would be processed. As of version 5, the podppd_flag will have seven possible values: normal operations vales: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; plus possible calibration maneuver related "CAL" values: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE. For ATL12, we will only use data when the POD/PPD flag indicates nominal normal operations or nominal CAL maneuvers, podppd_flag equal to 0 or 4.

COMPREHENSIVE Level of Service

Data: Data integrity and usability verified; data customization services available for select data

Documentation: Key metadata and comprehensive user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools and data customization services

See All Level of Service Details

Parameter(s):
  • SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT
Data Format(s):
  • HDF5
Spatial Coverage:
N: 90, 
S: -90, 
E: 180, 
W: -180
Platform(s):ICESat-2
Spatial Resolution:Not SpecifiedSensor(s):ATLAS
Temporal Coverage:
  • 13 October 2018
Version(s):V5
Temporal Resolution91 dayMetadata XML:View Metadata Record
Data Contributor(s):James Morison, David Hancock, Suzanne Dickinson, John Robbins, Leeann Roberts, et al

Geographic Coverage

Other Access Options

Other Access Options

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Morison, J. H., D. Hancock, S. Dickinson, J. Robbins, L. Roberts, R. Kwok, S. P. Palm, B. Smith, M. F. Jasinski, and the ICESat-2 Science Team. 2022. ATLAS/ICESat-2 L3A Ocean Surface Height, Version 5. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/ATLAS/ATL12.005. [Date Accessed].

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