L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission
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 selecte...
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| Tipo de documento: | Artículo |
| Fecha de publicación: | 2003 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/117259 |
| Acceso en línea: | https://hdl.handle.net/2117/117259 https://dx.doi.org/10.1029/2002RS002629 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Remote sensing Sea salinity Microwave radiometry Multiangular Interferometric radiometer Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| _version_ | 1878741469508927488 |
|---|---|
| author | Camps Carmona, Adriano José|||0000-0002-9514-4992 |
| author2 | Corbella Sanahuja, Ignasi|||0000-0001-5598-7955 Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098 Duffo Ubeda, Núria|||0000-0002-9398-3995 Torres Torres, Francisco|||0000-0003-1160-6350 Villarino Villarino, Ramón Enrique, L Julbé, F Font Capafons, Josep Julià, A Gabarró, C Etcheto, J Boutin, J Weill, A Caselles Costa, Vicent Rubio, E Wursteisen, P |
| author2_role | author author author author author author author author author author author author author author author author |
| author_browse | Boutin, J Camps Carmona, Adriano José|||0000-0002-9514-4992 Caselles Costa, Vicent Corbella Sanahuja, Ignasi|||0000-0001-5598-7955 Duffo Ubeda, Núria|||0000-0002-9398-3995 Enrique, L Etcheto, J Font Capafons, Josep Gabarró, C Julbé, F Julià, A Rubio, E Torres Torres, Francisco|||0000-0003-1160-6350 Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098 Villarino Villarino, Ramón Weill, A Wursteisen, P |
| author_facet | Camps Carmona, Adriano José|||0000-0002-9514-4992 Corbella Sanahuja, Ignasi|||0000-0001-5598-7955 Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098 Duffo Ubeda, Núria|||0000-0002-9398-3995 Torres Torres, Francisco|||0000-0003-1160-6350 Villarino Villarino, Ramón Enrique, L Julbé, F Font Capafons, Josep Julià, A Gabarró, C Etcheto, J Boutin, J Weill, A Caselles Costa, Vicent Rubio, E Wursteisen, P |
| author_role | author |
| collection | UPCommons. Portal del coneixement obert de la UPC |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_e5bb2eb24ae01f98eeabcbe73efd7d6d |
| institution | Universitat Politècnica de Catalunya (UPC) |
| instname_str | Universitat Politècnica de Catalunya (UPC) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:upcommons.upc.edu:2117/117259 |
| publishDate | 2003 |
| publishDateSort | 2003 |
| reponame_str | UPCommons. Portal del coneixement obert de la UPC |
| spelling | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission Camps Carmona, Adriano José|||0000-0002-9514-4992 Corbella Sanahuja, Ignasi|||0000-0001-5598-7955 Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098 Duffo Ubeda, Núria|||0000-0002-9398-3995 Torres Torres, Francisco|||0000-0003-1160-6350 Villarino Villarino, Ramón Enrique, L Julbé, F Font Capafons, Josep Julià, A Gabarró, C Etcheto, J Boutin, J Weill, A Caselles Costa, Vicent Rubio, E Wursteisen, P Remote sensing Sea salinity Microwave radiometry Multiangular Interferometric radiometer Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció 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. Peer Reviewed https://hdl.handle.net/2117/117259 https://dx.doi.org/10.1029/2002RS002629 |
| spellingShingle | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission Camps Carmona, Adriano José|||0000-0002-9514-4992 Remote sensing Sea salinity Microwave radiometry Multiangular Interferometric radiometer Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| title | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| title_full | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| title_fullStr | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| title_full_unstemmed | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| title_short | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| title_sort | L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission |
| topic | Remote sensing Sea salinity Microwave radiometry Multiangular Interferometric radiometer Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| topic_facet | Remote sensing Sea salinity Microwave radiometry Multiangular Interferometric radiometer Teledetecció Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| url | https://hdl.handle.net/2117/117259 https://dx.doi.org/10.1029/2002RS002629 |