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.
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.
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. 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.’
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: The 2022 Hunga-Tonga Hunga-Ha′apai eruption - Altimetry data and models help us understand how a volcanic eruption generated a tsunami
Dataset Highlight: River Discharge from the SWOT Mission
Dr. Hind Oubanas, CNES’s Surface Water and Ocean Topography (SWOT) Hydrology Science Lead, gives an overview of SWOT river discharge data products and algorithm development. Specifically, the Dr. Oubanas describes the work of the SWOT Discharge Algorithms Working Group (DAWG), detailing how river discharge is derived from SWOT observations, and what products are being developed and validated.
Data in Action: The rate of global sea level rise doubled during the past three decades
Global Mean Sea Level time series from 1993 to 2023 from altimetry. Past and current altimetry measurements allow us to monitor global sea level and to make projections for the future. If the current trajectory continues, global sea levels will increase by more than 16.9 cm over the next three decades.