Delivery of new Suomi NPP data ceases on Nov. 2, 2026. Users should transition to alternative products. Suomi NPP data announcement

Migration to Consolidated Ingest and Archive will interrupt data ingestion at PO.DAAC, ASF DAAC, and GES DISC on Oct. 28-30, 2026. Read more

Sea Surface Topography Data Access and Tools

Sea Surface Topography Datasets

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Dataset	Version	Platform	Instrument	Temporal Extent	Spatial Extent	Spatial Resolution	Data Format
ECCO Sea Surface Height - Daily Mean 0.5 Degree (Version 4 Release 4b)	V4r4b	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Daily Mean llc90 Grid (Version 4 Release 4b)	V4r4b	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	1 Decimal Degrees x 1 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Monthly Mean 0.5 Degree (Version 4 Release 4b)	V4r4b	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Monthly Mean llc90 Grid (Version 4 Release 4b)	V4r4b	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	1 Decimal Degrees x 1 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Daily Mean 0.5 Degree (Version 4 Release 4)	V4r4	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Daily Mean llc90 Grid (Version 4 Release 4)	V4r4	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	1 Decimal Degrees x 1 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Monthly Mean 0.5 Degree (Version 4 Release 4)	V4r4	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Monthly Mean llc90 Grid (Version 4 Release 4)	V4r4	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	1 Decimal Degrees x 1 Decimal Degrees	netCDF-4
ECCO Sea Surface Height - Snapshot llc90 Grid (Version 4 Release 4)	V4r4	MODELS, MITgcm		1992-01-01 to 2018-01-01	N: 90 S: -90 E: 180 W: -180	1 Decimal Degrees x 1 Decimal Degrees	netCDF-4
Sentinel-6A MF Jason-CS L1A P4 Altimeter High Resolution (HR) NTC Intermediate Outputs with Instrument Calibrations V2	V2	Sentinel-6A	Poseidon-4 Radar Altimeter, AMR-C, DORIS, GNSS RECEIVER, GNSS-RO RECEIVER, Star Tracker	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180		netCDF-4
Sentinel-6A MF Jason-CS L1B P4 Altimeter High Resolution (HR) NTC Geolocated Waveforms V2	V2	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 L1B P4 Altimeter Low Resolution (LR) NTC Geolocated Waveforms V2	V2	Sentinel-6A	Poseidon-4 Radar Altimeter	2020-11-30	N: 66.15 S: -66.15 E: 180 W: -180		netCDF-4
SASSIE ECCO Ocean Bottom Pressure and Sea Surface Height - Daily Mean llc1080 Grid (Version 1 Release 1)	V1R1	MITgcm		2014-01-15 to 2021-02-08			netCDF-4
SASSIE ECCO Ocean Bottom Pressure and Sea Surface Height - Snapshot llc1080 Grid (Version 1 Release 1)	V1R1	MITgcm		2014-01-15 to 2021-02-08			netCDF-4
Tellus Level-4 Greenland Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06 version 02	RL06Mv02	GRACE-FO, GRACE	KBR	2002-04-01	N: 85 S: 60 E: -15 W: -70	55 Decimal Degrees x 25 Decimal Degrees	ASCII
Tellus Level-4 Antarctica Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06 version 02	RL06Mv02	GRACE-FO, GRACE	KBR	2002-04-01	N: -70 S: -90 E: 180 W: -180	360 Decimal Degrees x 20 Decimal Degrees	ASCII
Tellus Level-4 Ocean Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06 version 02	RL06Mv02	GRACE-FO, GRACE	KBR	2002-04-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	ASCII
JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06 Version 02	RL06Mv02	GRACE-FO, GRACE	KBR	2002-04-04	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Release 06 Version 02	RL06Mv02	GRACE-FO, GRACE	KBR	2002-04-04	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	netCDF-4
Tellus Level-4 Ocean Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06.3 version 04	RL06.3Mv04	GRACE-FO, GRACE	GRACE-FO MWI, GRACE INTERFEROMETER	2002-04-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	ASCII
Tellus Level-4 Ocean Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06.1 version 03	RL06.1Mv03	GRACE-FO, GRACE		2002-04-01	N: 90 S: -90 E: 180 W: -180	0.5 Decimal Degrees x 0.5 Decimal Degrees	ASCII
Sentinel-6A MF Jason-CS L2 Advanced Microwave Radiometer (AMR-C) NTC Geophysical Parameters (Unvalidated) G01	G01	Sentinel-6A	AMR	2020-11-28	N: 66.15 S: -66.15 E: 180 W: -180		netCDF-4
Sentinel-6A MF Jason-CS L2 Advanced Microwave Radiometer (AMR-C) NTC Geophysical Parameters G01	G01	Sentinel-6A	AMR	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 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 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

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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