SWOT Level 4 Sword of Science River Discharge Products, Version 3

(SWOT_L4_HR_DAWG_SOS_DISCHARGE_V3)
Version3
Processing Level4
Start/Stop Date2023-Mar-29 to 2025-May-02
Short NameSWOT_L4_HR_DAWG_SOS_DISCHARGE_V3
DescriptionThe SWOT Sword of Science River Discharge Products dataset from the Surface Water and Ocean Topography (SWOT) mission and produced by the Discharge Algorithm Working Group (DAWG), provides estimates of river discharge derived from the SWOT Level 2 River Single-Pass Vector Data Product, and includes both unconstrained and gauge constrained estimates that leverage in-situ measurements. 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. Sword of Science data products are generated from the open-source SWOT Confluence program and contain river discharge parameter estimates as well as discharge time series for both river reaches and river nodes, following the SWOT River Database (SWORD) structure. Granules from both constrained and unconstrained branches are composed of prior information (e.g., mean annual flow predicted by global hydrological models) and the resulting discharge estimates. Priors and results files for both constrained and unconstrained branches are available in netCDF format. Users are encouraged to reference the SWOT Confluence documentation and notebook tutorials for full documentation of the data structure and variables available. Development of the SWOT Confluence program as well as the Sword of Science data products was funded by NASA’s Advanced Information Systems Technology (AIST) program.
DOI10.5067/SWOT-SOS-RD3
MeasurementTERRESTRIAL HYDROSPHERE > GROUND WATER > GROUND WATER PROCESSES/MEASUREMENTS
TERRESTRIAL HYDROSPHERE > GROUND WATER > GROUND WATER PROCESSES/MEASUREMENTS
TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES
TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS
TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS
Platform/Sensor
SWOT
Platform
Name: Surface Water Ocean Topography (SWOT)
/
KaRIn
SENSOR
Name: Ka-band Radar Interferometer (KaRIn)

ProjectSurface Water Ocean Topography (SWOT)
Data ProviderCreator: SWOT Discharge Algorithm Working Group (DAWG)
Release Date: 2025-Dec-22
Resource: https://github.com/SWOT-Confluence

FormatnetCDF-4
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Temporal Resolution: 1 second - < 1 minute
 
Coverage
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2023-Mar-29 to 2025-May-02
Granule Time Span: 2023-Mar-30 to 2025-May-03
 
Projection
Projection Type: WGS84
Ellipsoid: WGS 84
 
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation SWOT Discharge Algorithm Working Group (DAWG). 2025. SWOT discharge prior information and processing outputs. Ver. 3.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SWOT-SOS-RD3

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For more information see Data Citations and Acknowledgments.
Journal Reference Durand, M., Gleason, C. J., Pavelsky, T. M., Prata de Moraes Frasson, R., Turmon, M., David, C. H., et al.. 2023. A Framework for Estimating Global River Discharge From the Surface Water and Ocean Topography Satellite Mission, Water Resources Research. https://doi.org/10.1029/2021WR031614