• Due to planned system maintenance taking place on Wednesday, October 5 from 10 - 11 a.m. (USA Mountain Time), data set landing pages and other related data pages may be temporarily unavailable or behave unexpectedly during that timeframe.

  • For a list of known issues with this product, see the Known Issues document under the Documentation section of the page.

  • On Wednesday, October 5, from 9 a.m. to 12 p.m. (Mountain Time), the following data collections may not be available due to planned system maintenance: AMSR Unified, AMSR-E, Aquarius, High Mountain Asia, IceBridge, ICESat/GLAS, ICESat-2, LVIS, MEaSUREs, MODIS, SMAP, SnowEx, SSM/I-SSMIS and VIIRS.

ATLAS/ICESat-2 L3A Ocean Surface Height, Version 5 (ATL12)
Data set:
ATL12
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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.

Overview

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.
Data Contributor(s):
  • James
    Morison
  • David
    Hancock
  • Suzanne
    Dickinson
  • John
    Robbins
  • Leeann
    Roberts
Parameter(s):
SEA SURFACE HEIGHT
Platform(s):
ICESat-2
Sensor(s):
ATLAS
Data Format(s):
HDF5
Temporal Coverage:
13 October 2018 to present
Temporal Resolution:
91 day
Spatial Resolution:
Not Specified
Spatial Coverage:
N:
90
S:
-90
E:
180
W:
-180

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How To

This webinar introduces the ICESat-2 mission and shows you how to explore, access and customize ICESat-2 data with the OpenAltimetry application, using NSIDC DAAC tools, and shows you how to subset, reformat and analyze the data using Python.
Many NSIDC DAAC data sets can be accessed using the NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.
To convert HDF5 files into binary format you will need to use the h5dump utility, which is part of the HDF5 distribution available from the HDF Group. How you install HDF5 depends on your operating system.
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