Aquarius Official Release Level 3 Sea Surface Salinity Standard Mapped Image Ascending Annual Data V5.0
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| DOI | 10.5067/AQR50-3SAAS |
| Short Name | AQUARIUS_L3_SSS_SMIA_ANNUAL_V5 |
| Description | Aquarius Level 3 sea surface salinity (SSS) standard mapped image data contains gridded 1 degree spatial resolution SSS averaged over daily, 7 day, monthly, and seasonal time scales. This particular data set is the Annual, Ascending sea surface salinity product for version 5.0 of the Aquarius data set, which is the official end of mission public data release from the AQUARIUS/SAC-D mission. Only retrieved values for Ascending passes have been used to create this product. 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. |
| Version | 5.0 |
| Dataset Type | OPEN |
| Measurement | Oceans > Salinity/Density > Salinity |
| Processing Level | 3 |
| Coverage | Region: Global Northernmost Latitude: 90 degrees Southernmost Latitude: -90 degrees Westernmost Longitude: -180 degrees Easternmost Longitude: 180 degrees Time Span: 2011-Aug-25 to 2015-Jun-07 |
| Resolution | Spatial Resolution: 1 degrees (Latitude) x 1 degrees (Longitude) Temporal Resolution: 1 Year |
| Projection | Type: Gridded Detail: Ellipsoid: WGS 84 |
| Latency | 720 hours |
| Platform/Sensor | Aquarius_SAC-D / Platform Name: Aquarius SAC-D (Aquarius_SAC-D) Orbit Period: 98 minutes Inclination Angle: 98 degrees Ascending Node: 1970-Jan-01 00:00:00 AQUARIUS_RADIOMETER SENSOR Name: Aquarius Radiometer (AQUARIUS_RADIOMETER) Swath Width: 390 km Description: Launched in 2011 the 3 Aquarius radiometers meet very exacting requirements for low noise and calibration stability. This makes them about an order of magnitude more accurate than any radiometer ever used before for remote sensing of the earth. Aquarius measures in the microwave range at 1.413 GHz (+/- 25MHz). Aquarius_SAC-D / Platform Name: Aquarius SAC-D (Aquarius_SAC-D) Orbit Period: 98 minutes Inclination Angle: 98 degrees Ascending Node: 1970-Jan-01 00:00:00 AQUARIUS_SCATTEROMETER SENSOR Name: Aquarius Scatterometer (AQUARIUS_SCATTEROMETER) Swath Width: 390 km Description: The Aquarius scatterometer is a total-power L-band (1.26 GHz)radar system for estimating ocean surface roughness. Itsmeasurements will enable the removal of wind effects from theAquarius radiometer ocean-surface brightness temperaturemeasurements being used to retrieve ocean salinity. TheAquarius scatterometer is a relatively simple, low-spatialresolution power-detecting radar, without ranging capability.But to meet its science requirement, it must be very stable, withrepeatability on the order of 0.1 dB over several days, andcalibrated accuracy to this level over several months. Datafrom this instrument over land as well as ocean areas will beavailable for a variety of geophysical applications. |
| Project | AQUARIUS SAC-D (AQUARIUS SAC-D) |
| Data Provider | Creator: NASA Aquarius project Release Place: Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, MD., 20771, USA Release Date: 2017-Dec-07 Resource: http://podaac.jpl.nasa.gov/SeaSurfaceSalinity/Aquarius |
| Keyword(s) | Aquarius, salinity, polar, sun-synchronous, sss, psu, CONAE, argentina, project, mission, OBPG |
| Persistent ID | PODAAC-AQR50-3SAAS |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/aquarius/L3/mapped/V5/annual/SCIA |
| OPENDAP | https://podaac-opendap.jpl.nasa.gov/opendap/allData/aquarius/L3/mapped/V5/annual/SCIA/ |
| Format (Compression) | HDF5 (BZIP2) |
| Read Software | |
| IDL | https://podaac-tools.jpl.nasa.gov/drive/files/allData/aquarius/sw/idl/ IDL Reader and calling routines |
| MATLAB | https://podaac-tools.jpl.nasa.gov/drive/files/allData/aquarius/sw/matlab/ MATLAB Reader and calling routines |
| User's Guide | |
| User's Guide | https://podaac-tools.jpl.nasa.gov/drive/files/allData/aquarius/docs/v5/AQ-010-UG-0008_AquariusUserGuide_DatasetV5.0.pdf Aquarius Data User's Guide |
| Project Materials | |
| Aquarius v5.0 Documentation Package | https://podaac-tools.jpl.nasa.gov/drive/files/allData/aquarius/docs/v5/ ATBD, Validation Analysis, Product Specifications, etc |
| Additional Sites | |
| Aquarius/SAC-D Mission Website | https://aquarius.nasa.gov/ NASA Aquarius/SAC-D mission website |
| PO.DAAC Aquarius/SAC-D Mission page | https://podaac.jpl.nasa.gov/aquarius Mission and Instrument Overview |
| Known Issues | |
| Aquarius/SAC-D Event Log | https://oceancolor.gsfc.nasa.gov/sdpscgi/public/aquarius_report.cgi Information on observatory maneuvers, anomalies and other events |
| Citation | NASA Aquarius project. 2017. Aquarius Official Release Level 3 Sea Surface Salinity Standard Mapped Image Ascending Annual Data V5.0. Ver. 5.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/AQR50-3SAAS.
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Lee, T., G. Lagerloef, M.M. Gierach, H.-Y. Kao, S. Yueh, and K. Dohan (2012), Aquarius reveals salinity structure of tropical instability waves, Geophys. Res. Lett., 39, L12610, doi:10.1029/2012GL052232. | |||||||
