Aquarius Official Release Level 2 Sea Surface Salinity & Wind Speed Data V5.0

The version 5.0 Aquarius Level 2 product is the official third release of the orbital/swath data from AQUARIUS/SAC-D mission. The Aquarius Level 2 data set contains sea surface salinity (SSS) and wind speed data derived from 3 different radiometers and the onboard scatterometer. Included also in the Level 2 data are the horizontal and vertical brightness temperatures (TH and TV) for each radiometer, ancillary data, flags, converted telemetry and navigation data. Each data file covers one 98 minute orbit. The Aquarius instrument is onboard the AQUARIUS/SAC-D satellite, a collaborative effort between NASA and the Argentinian Space Agency Comision Nacional de Actividades Espaciales (CONAE). The instrument consists of three radiometers in push broom alignment at incidence angles of 29, 38, and 46 degrees incidence angles relative to the shadow side of the orbit. Footprints for the beams are: 76 km (along-track) x 94 km (cross-track), 84 km x 120 km and 96km x 156 km, yielding a total cross-track swath of 370 km. The radiometers measure brightness temperature at 1.413 GHz in their respective horizontal and vertical polarizations (TH and TV). A scatterometer operating at 1.26 GHz measures ocean backscatter in each footprint that is used for surface roughness corrections in the estimation of salinity. The scatterometer has an approximate 390km swath. Enhancements to the version 5.0 Level 2 data relative to v4.0 include: improvement of the salinity retrieval geophysical model for SST bias, estimates of SSS uncertainties (systematic and random components), and inclusion of a new spiciness variable.

Data and Resources

Field Value
accessLevel public
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citation NASA Aquarius project. 2017-12-07. Aquarius Official Release Level 2 Sea Surface Salinity. Version 5.0. Aquarius Sea Surface Salinity Products. Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, MD., 20771, USA. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/GSFC OBPG. https://doi.org/10.5067/AQR50-2SOCS. http://podaac.jpl.nasa.gov/SeaSurfaceSalinity/Aquarius. NASA Aquarius project, NASA/GSFC OBPG, 2017-12-07, Aquarius Official Release Level 2 Sea Surface Salinity & Wind Speed Data V5.0, http://podaac.jpl.nasa.gov/SeaSurfaceSalinity/Aquarius.
creator NASA Aquarius project
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identifier C1649553296-PODAAC
issued 2017-10-21
landingPage https://doi.org/10.5067/AQR50-2SOCS
language {en-US}
metadata_type geospatial
modified 2017-12-07
programCode {026:001}
publisher NASA/JPL/PODAAC
release-place Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, MD., 20771, USA
resource-type Dataset
series-name Aquarius Official Release Level 2 Sea Surface Salinity
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temporal 2011-08-25T00:01:01Z/2015-06-07T12:51:00Z
theme {"AQUARIUS SAC-D",geospatial}
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  • oceans
  • salinity-density
  • united-states
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maintainer User Services
maintainer_email podaac@podaac.jpl.nasa.gov
metadata_created 2025-11-22T07:45:52.065995
metadata_modified 2025-11-22T07:45:52.065999
notes The version 5.0 Aquarius Level 2 product is the official third release of the orbital/swath data from AQUARIUS/SAC-D mission. The Aquarius Level 2 data set contains sea surface salinity (SSS) and wind speed data derived from 3 different radiometers and the onboard scatterometer. Included also in the Level 2 data are the horizontal and vertical brightness temperatures (TH and TV) for each radiometer, ancillary data, flags, converted telemetry and navigation data. Each data file covers one 98 minute orbit. The Aquarius instrument is onboard the AQUARIUS/SAC-D satellite, a collaborative effort between NASA and the Argentinian Space Agency Comision Nacional de Actividades Espaciales (CONAE). The instrument consists of three radiometers in push broom alignment at incidence angles of 29, 38, and 46 degrees incidence angles relative to the shadow side of the orbit. Footprints for the beams are: 76 km (along-track) x 94 km (cross-track), 84 km x 120 km and 96km x 156 km, yielding a total cross-track swath of 370 km. The radiometers measure brightness temperature at 1.413 GHz in their respective horizontal and vertical polarizations (TH and TV). A scatterometer operating at 1.26 GHz measures ocean backscatter in each footprint that is used for surface roughness corrections in the estimation of salinity. The scatterometer has an approximate 390km swath. Enhancements to the version 5.0 Level 2 data relative to v4.0 include: improvement of the salinity retrieval geophysical model for SST bias, estimates of SSS uncertainties (systematic and random components), and inclusion of a new spiciness variable.
num_resources 13
num_tags 12
title Aquarius Official Release Level 2 Sea Surface Salinity & Wind Speed Data V5.0