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SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms - SSHA, Version 1.0

Published by NASA/JPL;NASA/JPL/PODAAC | National Aeronautics and Space Administration | Catalog Last Checked: August 18, 2026 at 11:38 PM | Dataset Last Updated: August 18, 2026
Same as L2_NALT_GDR using predicted values for some auxiliary data, and does not have GIM ionosphere model values. Uses the onboard DORIS orbit ephemeris. Available with latency of < 7 hours. Discrete measurements at nadir for each data downlink, along the ground track. Available in netCDF-4 file format.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "Earthdata Forum",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:earthdata-support@nasa.gov"
}
description Same as L2_NALT_GDR using predicted values for some auxiliary data, and does not have GIM ionosphere model values. Uses the onboard DORIS orbit ephemeris. Available with latency of < 7 hours. Discrete measurements at nadir for each data downlink, along the ground track. Available in netCDF-4 file format.
distribution 
[
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    "title": "Original Metadata",
    "format": "ISO",
    "mediaType": "text/xml",
    "conformsTo": "http://www.isotc211.org/2005/gmi",
    "description": "The metadata's original source.",
    "downloadURL": "https://cmr.earthdata.nasa.gov/search/concepts/C2628593693-POCLOUD.iso19115"
  },
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    "mediaType": "application/pdf",
    "downloadURL": "https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/D-109532_SWOT_UserHandbook_20240502.pdf"
  },
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]
identifier 10.5067/SWOT-NALT-OGDR-1.0
keyword 
[
  "earth-science-ocean-waves-oceans-significant-wave-height",
  "earth-science-sea-surface-topography-oceans-sea-surface-height"
]
license https://www.usa.gov/government-works
modified 2026-08-18
programCode 
[
  "026:000"
]
publisher 
{
  "name": "NASA/JPL;NASA/JPL/PODAAC",
  "@type": "org:Organization"
}
spatial 
"["CARTESIAN", [{"WestBoundingCoordinate": -180.0, "NorthBoundingCoordinate": 77.6, "EastBoundingCoordinate": 180.0, "SouthBoundingCoordinate": -77.6}]]"
theme 
[
  "Earth Science"
]
title SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms - SSHA, Version 1.0

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