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SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms - GDR Version D

Published by NASA/JPL;NASA/JPL/PODAAC | National Aeronautics and Space Administration | Catalog Last Checked: August 04, 2026 at 11:10 PM | Dataset Last Updated: June 22, 2026
Same as L2_NALT_GDR, using preliminary values for some auxiliary data. Uses Medium-accuracy (preliminary) Orbit Ephemeris (MOE). Available with latency of < 1.5 days. Discrete measurements at nadir for each half orbit, along the ground track. Available in netCDF-4 file format. This collection is a sub-collection of its parent: https://podaac.jpl.nasa.gov/dataset/SWOT_L2_NALT_IGDR_D

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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 preliminary values for some auxiliary data. Uses Medium-accuracy (preliminary) Orbit Ephemeris (MOE). Available with latency of < 1.5 days. Discrete measurements at nadir for each half orbit, along the ground track. Available in netCDF-4 file format. This collection is a sub-collection of its parent: https://podaac.jpl.nasa.gov/dataset/SWOT_L2_NALT_IGDR_D
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/C3317113901-POCLOUD.iso19115"
  },
  {
    "@type": "dcat:Distribution",
    "format": "PDF",
    "mediaType": "application/pdf",
    "downloadURL": "https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/D-109532_SWOT_UserHandbook_RevA_20250311_sig-final.pdf"
  },
  {
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    "format": "PDF",
    "mediaType": "application/pdf",
    "downloadURL": "https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/pdd/SALP-ST-M-EA-17043-CN_0107_NAlt.pdf"
  },
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  },
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    "format": "BIN",
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  },
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    "format": "JPEG",
    "mediaType": "image/jpeg",
    "downloadURL": "https://podaac.jpl.nasa.gov/Podaac/thumbnails/SWOT_L2_NALT_IGDR_1.0.jpg"
  },
  {
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    "mediaType": "application/octet-stream",
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  },
  {
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    "mediaType": "application/octet-stream",
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]
identifier 10.5067/SWOT-NALT-IGDR-D
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 2026-06-22
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 Interim Geophysical Data Record with Waveforms - GDR Version D

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