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Overview of the SMOS sea surface salinity prototype processor ArchiMer
Zine, S; Boutin, J; Font, J; Reul, Nicolas; Waldteufel, P; Gabarro, C; Tenerelli, Joseph; Petitcolin, F; Vergely, J; Talone, M; Delwart, S.
The L-band interferometric radiometer onboard the Soil Moisture and Ocean Salinity mission will measure polarized brightness temperatures (Tb). The measurements are affected by strong radiometric noise. However, during a satellite overpass, numerous measurements are acquired at various incidence angles at the same location on the Earth's surface. The sea surface salinity (SSS) retrieval algorithm implemented in the Level 2 Salinity Prototype Processor (L2SPP) is based on an iterative inversion method that minimizes the differences between Tb measured at different incidence angles and Tb simulated by a full forward model. The iterative method is initialized with a first-guess surface salinity that is iteratively modified until an optimal fit between the...
Tipo: Text Palavras-chave: Salinity; Oceanography; Microwave radiometry.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-3914.pdf
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Issues About Retrieving Sea Surface Salinity in Coastal Areas From SMOS Data ArchiMer
Zine, S; Boutin, J; Waldteufel, P; Vergely, J.l.; Pellarin, T; Lazure, Pascal.
This paper aims at studying the quality of the sea surface salinity (SSS) retrieved from soil moisture and ocean salinity (SMOS) data in coastal areas. These areas are characterized by strong and variable SSS gradients [several practical salinity units (psu) on relatively small scales: the extent of river plumes is highly variable, typically at kilometric and daily scales. Monitoring this variability from SMOS measurements is particularly challenging because of their resolution (typically 30-100 km) and because of the contamination by the nearby land. A set of academic tests was conducted with a linear coastline and constant geophysical parameters, and more realistic tests were conducted over the Bay of Biscay. The bias of the retrieved SSS has been...
Tipo: Text Palavras-chave: Soil Moisture and Ocean Salinity (SMOS) mission; Sea surface salinity (SSS) retrieval; L band radiometry; Coastal areas.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3643.pdf
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