Delivery of Suomi National Polar-orbiting Partnership (Suomi NPP) satellite data products will cease on November 1, 2026. Data users should transition now to alternative products from NOAA-21 and NOAA-20. Suomi NPP data announcement

Sea Surface Topography Data Access and Tools

Sea Surface Topography Datasets

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Dataset Sort descending	Version	Platform	Instrument	Temporal Extent	Spatial Extent	Data Format
Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) NTC Reduced Ocean Surface Topography G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) NTC Reduced Ocean Surface Topography (Unvalidated) F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) NTC Reduced Ocean Surface Topography (Unvalidated) G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) STC Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-12-07	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter High Resolution (HR) STC Reduced Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-12-07	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NRT Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, DORIS, GNSS RECEIVER, AMR	2020-11-30 to Present	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NRT Reduced Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-12-07	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography (Unvalidated) F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography (Unvalidated) G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography (Unvalidated) F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography (Unvalidated) G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) STC Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-12-07	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) STC Reduced Ocean Surface Topography	F	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-12-07	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2P P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2P P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2P P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L2P P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L3 P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography (Unfiltered) Version F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L3 P4 Altimeter High Resolution (HR) NTC Ocean Surface Topography (Unfiltered) Version G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L3 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography (Unfiltered) Version F08	F08	Sentinel-6A	Poseidon-4 Radar Altimeter	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4
Sentinel-6A MF Jason-CS L3 P4 Altimeter Low Resolution (LR) NTC Ocean Surface Topography (Unfiltered) Version G01	G01	Sentinel-6A	Poseidon-4 Radar Altimeter	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180	netCDF-4

An artist's rendition of the SWOT satellite emitting radar pulses to Earth's surface.

NASA's Surface Water and Ocean Topography (SWOT) Mission Data Release

Recently released datasets from the SWOT mission provide scientists with previously unavailable measurements of Earth's surface water.

9 MIN READ

Webinar thumbnail for the SWOT webinar to be held on March 20, 2024.

Accessing Data for the World's Water with SWOT

Learn how to discover, access, and use Surface Water and Ocean Topography (SWOT) mission data and how these data can lead to new, innovative science and applications in the world of water.

Global coverage of the Surface Water and Ocean Topography (SWOT) River Reach collection highlighting its 21 day global cycle of Water Surface Elevation (WSE).

From Space to Solutions: Access, Visualization, and Analysis Services for SWOT Hydrology

Join us on Wed., July 30 at 2:00 p.m. EDT (-04:00 UTC) to explore SWOT hydrology data collections of rivers and lakes, and to learn how to work with SWOT hydrology data using tools provided by both NASA's PO.DAAC and the USGS.

Earthdata graphic identifier on top of satellite image of Earth

Hydrocron: A New Tool for SWOT Time Series Analysis

Hydrocron enables users to receive all Surface Water and Ocean Topography (SWOT) observations for a specific river ID within a specified date range.

Sea Surface Topography Data Tools

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Items

Tool Sort descending	Description	Services
Hydrocron	Hydrocron is an API that repackages hydrology datasets from SWOT into formats that make time-series analysis easier.	Subsetting, Visualization
SWOT Swath Visualizer	The Surface Water and Ocean Topography (SWOT) Swath Visualizer provides a visualization of two instruments’ coverage of Earth's surface: the Ka-band Radar Interferometer and altimeter.	Analysis, Data Curation, Visualization

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