SWOT Global River Discharge & Water Quality Estimates Now Available
PO.DAAC is pleased to announce the public release of the SWOT L4 Sword of Science River Discharge Products, Version 3.
Data in Action: Sentinel-6B will continue TOPEX/Poseidon, Jason-1,-2,-3, and Sentinel-6 Michael Freilich legacy
Sentinel-6B launched in November 2025 and will continue the decades-long record of sea level measurements with an inch accuracy.
Data in Action: Potential of SWOT for Sea Ice Monitoring Unveiled
The study underscores SWOT’s potential to provide two-dimensional estimates of sea ice thickness—essential to quantify exchanges between sea ice, the atmosphere, and the ocean, which current altimeters cannot provide. SWOT sea ice measurements can also support applications that demand greater spatial coverage and more frequent sampling, including process studies, seasonal forecasting, and navigation.
NASA Data Training Webinar August 21, 2025: Topic- Access Virtualized PO.DAAC Oceanography Data
Learn how to use Python and Xarray to access virtualized, exploratIon- and analysis-ready physical oceanography datasets from NASA's PO.DAAC.
NASA Earthdata Webinar July 30, 2025: From Space to Solutions: Access, Visualization, and Analysis Services for SWOT Hydrology
Learn how to work with SWOT hydrology data using tools provided by NASA's PO.DAAC and USGS.
SWOT River Reach GIS Feature Service Now Available
Explore SWOT Level 2 river data in the software of choice, such as ArcGIS, QGIS or Python
Data in Action: Sediment Accumulation at the Amazon Coast Observed by Satellite Gravimetry
By accurately measuring month-to-month mass changes across the Earth, a recent study shows that GRACE and GRACE-FO can be used to detect sediment accumulation. With more than 20 years of data, subtle mass changes can now be observed.

Science Disciplines

Ocean

Cryosphere

Terrestrial Hydrosphere

Find Data

Ocean Measurements

The Ocean includes geophysical parameters that characterize the oceans (e.g., temperature, salinity, sea surface topography, circulation, etc.) as well as those physical processes operating within the Earth’s oceans and at its surface. Select from below to learn more about the related measurements.

Ocean Temperature

Ocean Waves

Ocean Winds

Salinity/Density

Ocean Surface Topography

Ocean Circulation

Ocean Heat Budget

Gravity/Gravitational Field

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Cryosphere Measurements

The Cryosphere includes the portions of Earth's surface where water is in solid form, including sea ice, snow cover, glaciers, ice sheets, and frozen ground. Select from below to learn more about the related measurements.

Glaciers/Ice Sheets

Sea Ice

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Terrestrial Hydrosphere Measurements

Terrestrial Hydrosphere includes water on the land surface and underground in the form of lakes, rivers, groundwater, and total water storage. Select from below to learn more about the related measurements.

Surface Water

Announcements

Jan

SWOT Global River Discharge & Water Quality Estimates Now Available

PO.DAAC is pleased to announce the public release of the SWOT Level 4 Sword of Science River Discharge Products, Version 3.

The SWOT mission is implemented jointly by NASA and Centre National D'Etudes Spatiales (CNES) to provide valuable data and information about the world's oceans and its terrestrial surface water such as lakes, rivers, and wetlands. This data collection provides discharge time series for the six flow law parameter estimate (FLPE) algorithms and a single ‘consensus’ estimate that represents the canonical ‘SWOT Discharge.’

The dataset can be accessed through NASA Earthdata Search and through the DOI: https://doi.org/10.5067/SWOT-SOS-RD3 link to the corresponding dataset landing page.

Dec

Sentinel-6A Michael Freilich Reprocessed Altimetry Datasets Release

The PO.DAAC is pleased to announce the release of reprocessed Level 1A (L1A), Level 1B (L1B), Level 2 (L2), Level 2P (L2P), and Level 3 (L3) altimetry data from the Sentinel-6 Michael Freilich/Jason CS radar altimeter mission. This mission aims to provide high-precision measurements of global sea-level that build upon the extensive record of observations from the previous Jason series altimetry missions. Datasets in this release were processed with the latest Sentinel-6 processing baseline (G01).

The new baseline collection G01 adds a major improvement to both LR and HR products by incorporating the GDR-G standards, including a new orbit solution following POE-G standards.

Jul

Release of GHRSST Level 4 Sea Surface Temperature SPoRT dataset

The PO.DAAC is pleased to announce the public release of the GHRSST Level 4 SPoRT Global Foundation Sea Surface Temperature Analysis (v1.0) dataset produced by the NASA Short-term Prediction Research and Transition (SPoRT) project at the NASA Marshall Space Flight Center (MSFC). This dataset provides continuous, high-resolution, composited near-global (80N-80S) sea surface temperature fields twice daily at 2 km resolution for regional weather, maritime, and coastal applications.

The SPoRT SST analysis composites seven-days of Visible Infrared Imaging Radiometer Suite (VIIRS) and Advanced Very High Resolution Radiometer (AVHRR) satellite L2 SST data, with additional data from OSTIA and Geo-Polar Blended L4 SST products into a single analysis.

Jul

SWOT River Reach GIS Feature Service Now Available

The PO.DAAC is pleased to announce the availability of the Surface Water and Ocean Topography (SWOT) Level 2 River Single-Pass Vector Data Product as a Geographical Information System (GIS) service.

Made available through NASA’s Earthdata GIS. These services allow you to access, visualize and analyze SWOT River data through your GIS software of choice without the need to download.

The services are available as both ArcGIS REST Feature Service and Image Service endpoints, as well as Open Geospatial Consortium (OGC) endpoints.

For more information on all available services please visit the PO.DAAC Cookbook and GIS chapter which highlights how to access the services in ArcGIS Pro, QGIS and Python.

Navigation

Science Disciplines

Ocean Measurements

Cryosphere Measurements

Terrestrial Hydrosphere Measurements

Announcements