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Citació: A. Camps, I. Corbella, M. Vall-llossera, N. Duffo, F. Torres, R. Villarino, L. Enrique, F. Julbé, J. Font, A. Julià, C. Gabarró, J. Etcheto, J. Boutin, A. Weill, V. Caselles, E. Rubio, P. Wursteisen, . (2003). L-Band Sea Surface Emissivity: Preliminary Results Of The WISE-2000 Campaign And Its Application To Salinity Retrieval In the SMOS Mission. Radio science, 38 (3): 36-1-36-8. ISSN:0048-6604
Títol: L-Band Sea Surface Emissivity: Preliminary Results Of The WISE-2000 Campaign And Its Application To Salinity Retrieval In the SMOS Mission
Autor: Camps Carmona, Adriano José Veure Producció científica UPC; Corbella Sanahuja, Ignasi Veure Producció científica UPC; Vall-Llossera Ferran, Mercedes Magdalena Veure Producció científica UPC; Duffo Ubeda, Núria Veure Producció científica UPC; Torres Torres, Francisco Veure Producció científica UPC; Villarino Villarino, Ramón Veure Producció científica UPC; Enrique, L.; Julbé, F.; Font, Jordi; Julià, A.; Gabarró Prats, Carolina Veure Producció científica UPC; Etcheto, Jacqueline; Boutin, Jacqueline; Weill, Alain; Caselles, Vicente; Rubio, Eva; Wursteisen, Patrick
Data: 30-jun-2003
Tipus de document: Article
Resum: Soil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth Explorer Opportunity Mission SMOS (Soil Moisture and Ocean Salinity) was selected by ESA (European Space Agency) in May 1999. SMOS' single payload is a Y-shaped 2-D aperture synthesis interferometric radiometer called MIRAS (Microwave Imaging Radiometer by Aperture Synthesis). SMOS presents some particular imaging peculiarities: variation of incidence and azimuth angles, different radiometric sensitivity and accuracy at each direction (pixels), and geometric polarization mixing. Therefore, the accuracy of the geophysical parameter retrieval depends on the knowledge of the angular dependence of the emissivity over a wide range of incidence and azimuth angles. The accuracy of the sea surface salinity retrievals depends on our capability to correct the wind-induced variation of the brightness temperatures. To better understand wind effects, ESA sponsored the WInd and Salinity Experiment 2000 (WISE-2000) from November 15, 2000, to January 16, 2001, in the Casablanca oil rig, at 40 km off the coast of Tarragona (Spain). This paper is divided into two parts. First, it presents the derived sensitivities of the brightness temperatures at vertical and horizontal polarizations with wind speed, and compares to Hollinger's measurements and numerical simulations. Second, these results are applied to the SMOS sea surface salinity (SSS) retrieval problem for different tracks within the swath. It is shown that, except for low SSS and sea surface temperature (SST), the retrieved SSS has a RMS error of approximately 1 psu in one satellite pass.
ISSN: 0048-6604
URI: http://hdl.handle.net/2117/10248
Apareix a les col·leccions:Departament de Teoria del Senyal i Comunicacions. Articles de revista
RSLAB - Remote Sensing Research Group. Articles de revista
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