Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers

The Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission was selected in May 1999 by the European Space Agency Earth Observation Programme Board to provide global and frequent soil moisture (SM) and sea surface salinity (SSS) maps. SMOS' single payload is the Microwave Ima...

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Autores: Camps Carmona, Adriano José|||0000-0002-9514-4992, Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098, Batres Gonzalez, Luis, Torres Torres, Francisco|||0000-0003-1160-6350, Duffo Ubeda, Núria|||0000-0002-9398-3995, Corbella Sanahuja, Ignasi|||0000-0001-5598-7955
Tipo de recurso: artículo
Fecha de publicación:2005
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:2117/2122
Acceso en línea:https://hdl.handle.net/2117/2122
Access Level:acceso abierto
Palabra clave:Microwave measurements
Remote sensing
Instrumentation for geophysical research
Soil moisture
Geophysics
albedo
hydrological techniques
hydrology
microwave measurement
ocean temperature
oceanographic techniques
opacity
radiometry
remote sensing
soil
AD 1999 05
Earth Explorer Opportunity Mission
European Space Agency Earth Observation Programme Board
Faraday rotations
L-band aperture synthesis interferometric radiometers
Microwave Imaging Radiometer by Aperture Synthesis sensor
Soil Moisture and Ocean Salinity
Stokes parameter
angular variation
bare soils
brightness temperatures
cold waters
dual-polarization mode
full-polarimetric mode
geometric rotation
geophysical error
sea surface salinity
sea surface temperature
soil moisture retrieval
vegetation-covered soils
Microones -- Mesurament
Sensors remots
Geofísica
Geofísica -- Aparells i instruments
Sòl -- Anàlisi
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
id ES_ce34db7002ebcdf47674c39b2bb60db7
oai_identifier_str oai:upcommons.upc.edu:2117/2122
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
title Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
spellingShingle Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
Camps Carmona, Adriano José|||0000-0002-9514-4992
Microwave measurements
Remote sensing
Instrumentation for geophysical research
Soil moisture
Geophysics
albedo
hydrological techniques
hydrology
microwave measurement
ocean temperature
oceanographic techniques
opacity
radiometry
remote sensing
soil
AD 1999 05
Earth Explorer Opportunity Mission
European Space Agency Earth Observation Programme Board
Faraday rotations
L-band aperture synthesis interferometric radiometers
Microwave Imaging Radiometer by Aperture Synthesis sensor
Soil Moisture and Ocean Salinity
Stokes parameter
angular variation
bare soils
brightness temperatures
cold waters
dual-polarization mode
full-polarimetric mode
geometric rotation
geophysical error
radiometry
sea surface salinity
sea surface temperature
soil moisture retrieval
vegetation-covered soils
Microones -- Mesurament
Sensors remots
Geofísica
Geofísica -- Aparells i instruments
Sòl -- Anàlisi
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
title_short Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
title_full Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
title_fullStr Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
title_full_unstemmed Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
title_sort Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
dc.creator.none.fl_str_mv Camps Carmona, Adriano José|||0000-0002-9514-4992
Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098
Batres Gonzalez, Luis
Torres Torres, Francisco|||0000-0003-1160-6350
Duffo Ubeda, Núria|||0000-0002-9398-3995
Corbella Sanahuja, Ignasi|||0000-0001-5598-7955
author Camps Carmona, Adriano José|||0000-0002-9514-4992
author_facet Camps Carmona, Adriano José|||0000-0002-9514-4992
Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098
Batres Gonzalez, Luis
Torres Torres, Francisco|||0000-0003-1160-6350
Duffo Ubeda, Núria|||0000-0002-9398-3995
Corbella Sanahuja, Ignasi|||0000-0001-5598-7955
author_role author
author2 Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098
Batres Gonzalez, Luis
Torres Torres, Francisco|||0000-0003-1160-6350
Duffo Ubeda, Núria|||0000-0002-9398-3995
Corbella Sanahuja, Ignasi|||0000-0001-5598-7955
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Microwave measurements
Remote sensing
Instrumentation for geophysical research
Soil moisture
Geophysics
albedo
hydrological techniques
hydrology
microwave measurement
ocean temperature
oceanographic techniques
opacity
radiometry
remote sensing
soil
AD 1999 05
Earth Explorer Opportunity Mission
European Space Agency Earth Observation Programme Board
Faraday rotations
L-band aperture synthesis interferometric radiometers
Microwave Imaging Radiometer by Aperture Synthesis sensor
Soil Moisture and Ocean Salinity
Stokes parameter
angular variation
bare soils
brightness temperatures
cold waters
dual-polarization mode
full-polarimetric mode
geometric rotation
geophysical error
radiometry
sea surface salinity
sea surface temperature
soil moisture retrieval
vegetation-covered soils
Microones -- Mesurament
Sensors remots
Geofísica
Geofísica -- Aparells i instruments
Sòl -- Anàlisi
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
topic Microwave measurements
Remote sensing
Instrumentation for geophysical research
Soil moisture
Geophysics
albedo
hydrological techniques
hydrology
microwave measurement
ocean temperature
oceanographic techniques
opacity
radiometry
remote sensing
soil
AD 1999 05
Earth Explorer Opportunity Mission
European Space Agency Earth Observation Programme Board
Faraday rotations
L-band aperture synthesis interferometric radiometers
Microwave Imaging Radiometer by Aperture Synthesis sensor
Soil Moisture and Ocean Salinity
Stokes parameter
angular variation
bare soils
brightness temperatures
cold waters
dual-polarization mode
full-polarimetric mode
geometric rotation
geophysical error
radiometry
sea surface salinity
sea surface temperature
soil moisture retrieval
vegetation-covered soils
Microones -- Mesurament
Sensors remots
Geofísica
Geofísica -- Aparells i instruments
Sòl -- Anàlisi
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
description The Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission was selected in May 1999 by the European Space Agency Earth Observation Programme Board to provide global and frequent soil moisture (SM) and sea surface salinity (SSS) maps. SMOS' single payload is the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) sensor, an L-band two-dimensional aperture synthesis interferometric radiometer with multiangular and polarimetric imaging capabilities. The definition of the SMOS Level 2 Processor requires the selection of the optimum operation mode (dual-polarization or full-polarimetric) for each application, the specification of the required auxiliary data, and the optimum retrieval algorithms. Using the SMOS simulator and based on the experience gained in previous works, this paper presents a study of the SM and SSS retrieval capabilities over homogeneous pixels, in the two modes of operation with different auxiliary data. It is found that SSS retrievals using the first Stokes parameter measured in the dual-polarization mode perform somewhat worse than using the vertical (T/sub vv/) and horizontal (T/sub hh/) brightness temperatures measured in the full-polarimetric mode, and the performance degrades for cold waters due to the lower sensitivity of the brightness temperature to SSS at low sea surface temperature (SST). Due to the larger angular variation of T/sub hh/ and T/sub vv/, SM retrievals using T/sub hh/ and T/sub vv/ measured in the full-polarimetric mode exhibit a significant better performance over bare soils than over vegetation-covered soils. Over vegetation-covered soils vegetation parameters (opacity and albedo) can be inferred over a 550-km swath width in the full-polarimetric mode. However, since the first Stokes parameter is independent of both geometric and Faraday rotations, it is very robust in the presence of instrumental and geophysical errors. In the SSS retrieval problem and in the SM retrieval problem (with T/sub hh/ and T/sub vv/ measured in the full-polarimetric mode), the performance of the retrieval algorithms tested is not significantly altered if the model parameters are not exactly known, but are left as adjustable parameters in the optimization process.
publishDate 2005
dc.date.none.fl_str_mv 2005
2005-05-31
2008
2008-06-29
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/2122
url https://hdl.handle.net/2117/2122
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.publisher.none.fl_str_mv IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
publisher.none.fl_str_mv IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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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spelling Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometersCamps Carmona, Adriano José|||0000-0002-9514-4992Vall-Llossera Ferran, Mercedes Magdalena|||0000-0003-1357-7098Batres Gonzalez, LuisTorres Torres, Francisco|||0000-0003-1160-6350Duffo Ubeda, Núria|||0000-0002-9398-3995Corbella Sanahuja, Ignasi|||0000-0001-5598-7955Microwave measurementsRemote sensingInstrumentation for geophysical researchSoil moistureGeophysicsalbedohydrological techniqueshydrologymicrowave measurementocean temperatureoceanographic techniquesopacityradiometryremote sensingsoilAD 1999 05Earth Explorer Opportunity MissionEuropean Space Agency Earth Observation Programme BoardFaraday rotationsL-band aperture synthesis interferometric radiometersMicrowave Imaging Radiometer by Aperture Synthesis sensorSoil Moisture and Ocean SalinityStokes parameterangular variationbare soilsbrightness temperaturescold watersdual-polarization modefull-polarimetric modegeometric rotationgeophysical errorradiometrysea surface salinitysea surface temperaturesoil moisture retrievalvegetation-covered soilsMicroones -- MesuramentSensors remotsGeofísicaGeofísica -- Aparells i instrumentsSòl -- AnàlisiÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::TeledeteccióThe Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission was selected in May 1999 by the European Space Agency Earth Observation Programme Board to provide global and frequent soil moisture (SM) and sea surface salinity (SSS) maps. SMOS' single payload is the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) sensor, an L-band two-dimensional aperture synthesis interferometric radiometer with multiangular and polarimetric imaging capabilities. The definition of the SMOS Level 2 Processor requires the selection of the optimum operation mode (dual-polarization or full-polarimetric) for each application, the specification of the required auxiliary data, and the optimum retrieval algorithms. Using the SMOS simulator and based on the experience gained in previous works, this paper presents a study of the SM and SSS retrieval capabilities over homogeneous pixels, in the two modes of operation with different auxiliary data. It is found that SSS retrievals using the first Stokes parameter measured in the dual-polarization mode perform somewhat worse than using the vertical (T/sub vv/) and horizontal (T/sub hh/) brightness temperatures measured in the full-polarimetric mode, and the performance degrades for cold waters due to the lower sensitivity of the brightness temperature to SSS at low sea surface temperature (SST). Due to the larger angular variation of T/sub hh/ and T/sub vv/, SM retrievals using T/sub hh/ and T/sub vv/ measured in the full-polarimetric mode exhibit a significant better performance over bare soils than over vegetation-covered soils. Over vegetation-covered soils vegetation parameters (opacity and albedo) can be inferred over a 550-km swath width in the full-polarimetric mode. However, since the first Stokes parameter is independent of both geometric and Faraday rotations, it is very robust in the presence of instrumental and geophysical errors. In the SSS retrieval problem and in the SM retrieval problem (with T/sub hh/ and T/sub vv/ measured in the full-polarimetric mode), the performance of the retrieval algorithms tested is not significantly altered if the model parameters are not exactly known, but are left as adjustable parameters in the optimization process.Peer ReviewedIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC20052005-05-3120082008-06-29journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/2122reponame: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:2117/21222026-05-27T15:37:01Z
score 15,300719

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