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

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 and 20 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 standard product release provides the geophysical parameters at both 1 and 20 Hz. The S6A NRT product is analogous to the Jason-3 OGDR product.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	August 25, 2026, 11:00 (UTC)
Created	April 1, 2025, 18:57 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	63b5a9c8-b274-499d-b5a2-45e8fe3efb31
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/S6AP4-2HSNR
license	https://www.usa.gov/government-works
modified	2026-08-17T22:16:03Z
programCode	{026:000}
publisher	NASA/JPL/PODAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	2a69e341e5d2bd732960db6bccfa7b93a9f63d6116d3f9267bf8174b04588df3
source_schema_version	1.1
spatial	["CARTESIAN", [{"NorthBoundingCoordinate": 66.15, "WestBoundingCoordinate": -180, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -66.15}]]
theme	{"Earth Science"}