Aquarius CAP Level 2 Sea Surface Salinity, Wind Speed & Direction Data V5.0
(AQUARIUS_L2_SSS_CAP_V5)| Version | 5.0 |
| Processing Level | 2 |
| Start/Stop Date | 2011-Aug-26 to 2015-Jun-05 |
| Short Name | AQUARIUS_L2_SSS_CAP_V5 |
| Description | The version 5.0 Aquarius CAP Level 2 product contains the fourth release of the AQUARIUS/SAC-D orbital/swath data based on the Combined Active Passive (CAP) algorithm. CAP is a P.I. produced dataset developed and provided by JPL. This Level 2 dataset contains sea surface salinity (SSS), wind speed and wind direction data derived from 3 different radiometers and the onboard scatterometer. The CAP algorithm simultaneously retrieves the salinity, wind speed and direction by minimizing the sum of squared differences between model and observations. The main improvements in CAP V5.0 relative to the previous version include: updates to the Geophysical Model Functions to 4th order harmonics with the inclusion of sea surface temperature (SST) and stability at air-sea interface effects; use of the Canadian Meteorological Center (CMC) SST product as the new source ancillary sea surface temperature data in place of NOAA OI SST. Each L2 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. |
| DOI | 10.5067/AQR50-2TOCS |
| Measurement | OCEANS > SALINITY/DENSITY > SALINITY OCEANS > OCEAN WINDS > SURFACE WINDS |
| Swath Width | 390 km |
| Platform/Sensor | Aquarius SAC-D / Platform Name: Aquarius SAC-D (Aquarius SAC-D) Orbit Period: 98.0 minutes Inclination Angle: 98.0 degrees AQUARIUS_RADIOMETER SENSOR Name: Aquarius Radiometer (AQUARIUS_RADIOMETER) Swath Width: 390.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. Aquarius SAC-D / Platform Name: Aquarius SAC-D (Aquarius SAC-D) Orbit Period: 98.0 minutes Inclination Angle: 98.0 degrees AQUARIUS_SCATTEROMETER SENSOR Name: Aquarius Scatterometer (AQUARIUS_SCATTEROMETER) Swath Width: 390.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. |
| Project | AQUARIUS SAC-D (AQUARIUS SAC-D) |
| Data Provider | Publisher: JPL - Simon Yueh Creator: Simon Yueh Release Place: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA91109, USA Release Date: 2018-Oct-01 Resource: http://podaac.jpl.nasa.gov/SeaSurfaceSalinity/Aquarius |
| Format | HDF5 |
| Keyword(s) | Aquarius, CAP, CAPv5, salinity, wind speed, wind direction, polar, sun-synchronous, sss, psu, CONAE, argentina, JPL |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Temporal Resolution: Daily - < Weekly Coverage Region: GLOBAL North Bounding Coordinate: 90 degrees South Bounding Coordinate: -90 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2011-Aug-26 to 2015-Jun-05 Granule Time Span: 2011-Aug-26 to 2015-Jun-05Swath Width: 390 km |
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| us-west-2 | |
| podaac-ops-cumulus-protected/AQUARIUS_L2_SSS_CAP_V5/ | |
| podaac-ops-cumulus-public/AQUARIUS_L2_SSS_CAP_V5/ | |
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| Data Subscriber | |
| Name | Long Name | Unit |
|---|---|---|
| anc_SSS | Sea surface salinity climatology | PSU |
| anc_surface_temp | Surface temperature | Kelvin |
| anc_swh | Ancillary significant wave height | Meters |
| anc_wind_dir | Ancillary wind direction 10m above surface | Degrees |
| anc_wind_speed | Ancillary wind speed 10m above surface | Meters/second |
| beam_clat | Beam center latitude | Degrees |
| beam_clon | Beam center longitude | Degrees |
| cap_far_rot | CAP Faraday rotation angle | Degrees |
| cap_flag | CAP quality flag | |
| ice_frac | Fraction of ice contamination (radiometer) | |
| land_frac | Fraction of land contamination (radiometer) | |
| scat_ice_frac | Fraction of ice contamination (scatterometer) | |
| scat_land_frac | Fraction of land contamination (scatterometer) | |
| scat_swh_wind_speed | Scatterometer-only wind speed with SWH GMF | Meters/second |
| scat_wind_speed | Scatterometer-only wind speed | Meters/second |
| sec | Block time, seconds of day | Seconds |
| SSS | Sea surface salinity | PSU |
| SSS_cap | CAP Sea surface salinity | PSU |
| SSS_cap_h | SSS_cap_h | |
| SSS_cap_rc | CAP Sea surface salinity with rain correction | PSU |
| SSS_cap_v | SSS_cap_v | |
| wind_dir_cap | CAP wind direction | Degrees |
| wind_dir_cap_rc | CAP_RC wind direction | Degrees |
| wind_speed_cap | CAP wind speed | Meters/second |
| wind_speed_cap_rc | CAP_RC wind speed | Meters/second |
| USER'S GUIDE | |
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| GENERAL DOCUMENTATION | |
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| DATA CITATION POLICY | |
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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 | Simon Yueh. 2018. Aquarius CAP Sea Surface Salinity and Wind Products. Ver. 5.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/AQR50-2TOCS
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Yueh,S.H., W.Tang,A.K.Hayashi,G.S.E.Lagerloef (2014). L-Band Passive and Active Microwave Geophysical Model Functions of Ocean Surface Winds and Applications to Aquarius Retrieval. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,51(9), 4619-4632 . |
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