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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Autores: 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
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma: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
Access Level: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
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spelling L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS missionCamps Carmona, Adriano José|||0000-0002-9514-4992Corbella Sanahuja, Ignasi|||0000-0001-5598-7955Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098Duffo Ubeda, Núria|||0000-0002-9398-3995Torres Torres, Francisco|||0000-0003-1160-6350Villarino Villarino, RamónEnrique, LJulbé, FFont Capafons, JosepJulià, AGabarró, CEtcheto, JBoutin, JWeill, ACaselles Costa, VicentRubio, EWursteisen, PRemote sensingSea salinityMicrowave radiometryMultiangularInterferometric radiometerTeledeteccióÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::TeledeteccióSoil 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 Reviewed20032003-06-0120182018-05-15journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/117259https://dx.doi.org/10.1029/2002RS002629reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1172592026-05-27T15:37:01Z
dc.title.none.fl_str_mv L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission
title L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission
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_short 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_sort L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission
dc.creator.none.fl_str_mv 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 Camps Carmona, Adriano José|||0000-0002-9514-4992
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
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
dc.subject.none.fl_str_mv 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 Remote sensing
Sea salinity
Microwave radiometry
Multiangular
Interferometric radiometer
Teledetecció
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
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.
publishDate 2003
dc.date.none.fl_str_mv 2003
2003-06-01
2018
2018-05-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/117259
https://dx.doi.org/10.1029/2002RS002629
url https://hdl.handle.net/2117/117259
https://dx.doi.org/10.1029/2002RS002629
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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