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Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) NRT Reduced Ocean Surface Topography

Published by NASA/JPL/PODAAC | National Aeronautics and Space Administration | Catalog Last Checked: September 08, 2026 at 11:49 PM | Dataset Last Updated: September 08, 2026
Provides L2 high resolution (HR) near real time (NRT; 3-hour latency) altimetry from the Poseidon-4 SAR altimeter on the Sentinel-6A Michael Freilich spacecraft. It contains Sea Surface Height (SSH), Sea Surface Height Anomalies (SSHA) and Significant Wave Height (SWH), along with 1 Hz Ku-band measurements processed from L1B altimetry including the range, orbital altitude, time, and water vapour. It also includes altimetry corrections, significant wave height and wind-speed from the AMR-C. This release is reduced to exclude the 20 Hz observations that are included in the standard product. The S6A NRT product is analogous to the Jason-3 OGDR product.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
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]
contactPoint 
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  "@type": "vcard:Contact",
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}
description Provides L2 high resolution (HR) near real time (NRT; 3-hour latency) altimetry from the Poseidon-4 SAR altimeter on the Sentinel-6A Michael Freilich spacecraft. It contains Sea Surface Height (SSH), Sea Surface Height Anomalies (SSHA) and Significant Wave Height (SWH), along with 1 Hz Ku-band measurements processed from L1B altimetry including the range, orbital altitude, time, and water vapour. It also includes altimetry corrections, significant wave height and wind-speed from the AMR-C. This release is reduced to exclude the 20 Hz observations that are included in the standard product. The S6A NRT product is analogous to the Jason-3 OGDR product.
distribution 
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identifier 10.5067/S6AP4-2HRNR
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 2026-09-08
programCode 
[
  "026:000"
]
publisher 
{
  "name": "NASA/JPL/PODAAC",
  "@type": "org:Organization"
}
spatial 
"["CARTESIAN", [{"NorthBoundingCoordinate": 66.15, "WestBoundingCoordinate": -180.0, "EastBoundingCoordinate": 180.0, "SouthBoundingCoordinate": -66.15}]]"
theme 
[
  "Earth Science"
]
title Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) NRT Reduced Ocean Surface Topography

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