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.

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. 

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. 

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.

Dear SWOT User Community,

We are pleased to inform you that the transition to KaRIn Version D products is complete.

Version D products are accessible through NASA Earthdata Search client and easily downloadable from the command line with the podaac-data-subscriber. Additional tips for searching KaRIn HR data products can be found in the PO.DAAC Cookbook - SWOT Chapter. KaRIn Version C products continue to be available at the PO.DAAC.

Presentations and recordings from the recent webinar introducing KaRIn Version D, along with other related resources, are available in the "Datasets Information" section on the PO.DAAC SWOT Mission page.

Dear SWOT User Community,

As a follow-up to the original announcement, the transition to SWOT Version D products has been tentatively postponed by one week, and a new schedule is planned as follows:

Version D products will be generated for all measurements spanning the start of the calibration phase onward, and consist of:

1. Reprocessed products for observations from the start of the calibration phase (March 30, 2023) through cycle 32 (~May 19, 2025). The reprocessing of SWOT KaRIn Version D products is scheduled to start in April 2025 and is expected to complete in early 2026.
2. Forward-processed products for measurements from May 6, 2025 onward.

Dear SWOT User Community,

The joint NASA/CNES SWOT project is pleased to announce the upcoming transition of SWOT science data products from Version C to Version D.

• The Version D products resolve several known issues in the Version C KaRIn science data products.
• They are generated with updated processing algorithms, calibration parameters, and some geophysical models.
• This release is referred to as Version D0.

The PO.DAAC is pleased to announce the public release of the NASA-SSH Sea Surface Height Indicators datasets produced by NASA. Four distinct datasets are released. The indicator values were calculated using data from the NASA-SSH Simple Gridded Sea Surface Height from Standardized Reference Missions Only Version 1 dataset (doi.org/10.5067/NSREF-SG0V1). More information regarding NASA-SSH is available from PO.DAAC’s NASA-SSH mission page.

The PO.DAAC is pleased to announce the public release of the NASA-SSH Sea Surface Height from Standardized Reference Missions Only Version 1 datasets produced by NASA. Two distinct datasets are released. The datasets are produced from observations of sea surface height from the radar altimeter satellites in the reference mission orbits, including TOPEX/Poseidon, the Jason series, and Sentinel-6. All missions have been referenced to a common baseline, additional quality control has been performed, and errors with wavelengths around one orbital cycle have been reduced. More information regarding NASA-SSH is available from PO.DAAC’s NASA-SSH mission page.