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The aquarius salinity retrieval algorithm
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hilburn, Kyle Le Vine, David Meissner Sr., Thomas Wentz, Frank Lagerloef, Gary |
| Copyright Year | 2012 |
| Description | The first part of this presentation gives an overview over the Aquarius salinity retrieval algorithm. The instrument calibration [2] converts Aquarius radiometer counts into antenna temperatures (TA). The salinity retrieval algorithm converts those TA into brightness temperatures (TB) at a flat ocean surface. As a first step, contributions arising from the intrusion of solar, lunar and galactic radiation are subtracted. The antenna pattern correction (APC) removes the effects of cross-polarization contamination and spillover. The Aquarius radiometer measures the 3rd Stokes parameter in addition to vertical (v) and horizontal (h) polarizations, which allows for an easy removal of ionospheric Faraday rotation. The atmospheric absorption at L-band is almost entirely due to molecular oxygen, which can be calculated based on auxiliary input fields from numerical weather prediction models and then successively removed from the TB. The final step in the TA to TB conversion is the correction for the roughness of the sea surface due to wind, which is addressed in more detail in section 3. The TB of the flat ocean surface can now be matched to a salinity value using a surface emission model that is based on a model for the dielectric constant of sea water [3], [4] and an auxiliary field for the sea surface temperature. In the current processing only v-pol TB are used for this last step. |
| File Size | 547462 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120009347 |
| Archival Resource Key | ark:/13960/t5hb4449k |
| Language | English |
| Publisher Date | 2012-07-22 |
| Access Restriction | Open |
| Subject Keyword | Oceanography Radiometers Ultrahigh Frequencies Calibrating Surface Roughness Sea Surface Temperature Ocean Surface Salinity Algorithms Faraday Effect Brightness Temperature Solar Radiation Numerical Weather Forecasting Antenna Radiation Patterns Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
