Spatial resolution in GNSS-R under coherent scattering

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Autor: Camps Carmona, Adriano José|||0000-0002-9514-4992
Formato: artículo
Fecha de publicación:2020
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/175851
Acesso em linha:https://hdl.handle.net/2117/175851
https://dx.doi.org/10.1109/LGRS.2019.2916164
Access Level:acceso abierto
Palavra-chave:Remote sensing
Coherent scattering
Fresnel zone
Global navigation satellite systems
Reflectometry (GNSS-R)
Spatial resolution
Teledetecció
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
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spelling Spatial resolution in GNSS-R under coherent scatteringCamps Carmona, Adriano José|||0000-0002-9514-4992Remote sensingCoherent scatteringFresnel zoneGlobal navigation satellite systemsReflectometry (GNSS-R)Spatial resolutionTeledeteccióÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Global Navigation Satellite Systems Reflectometry can be understood as a multistatic radar using satellite navigation signals as signals of opportunity. The scattered signals over sea ice, flooded areas, even under dense vegetation, and in some cases, over land show a significant coherent component. Under coherent scattering conditions, it is usually stated that the coherent signal component comes from an area equal to the first Fresnel zone. This letter analyzes in more detail the spatial resolution in this forward scattering configuration, showing that, when coherent scattering is nonnegligible, the spatial resolution is mostly determined by the geometry and not by typical surface roughness values. As the scattering area around the specular reflection point increases and encompasses the first Fresnel zone, the received power increases and then it fluctuates as higher order Fresnel zones are included (rapid phase changes due to the spherical waves). These contributions may explain in part the large scattering encountered over inhomogeneous land regions, as these different contributions add or subtract, depending on the phase of the electric field, and are weighted by different scattering coefficients (i.e., changes in the dielectric constant and/or surface roughness, such in water ponds or some agricultural fields). Finally, over homogeneous targets, when all Fresnel zones are included, the received power tends asymptotically to the value obtained using the free-space propagation with a total path length equal to the sum of the path lengths, weighted by the reflection coefficient. This value can also be interpreted as coming from an effective region that is actually ~0.6 times the first Fresnel zone.Peer Reviewed20202020-01-0120202020-01-27journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/175851https://dx.doi.org/10.1109/LGRS.2019.2916164reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 RTI2018-099008-B-C21 SENSING WITH PIONEERING OPPORTUNISTIC TECHNIQUESopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1758512026-05-27T15:37:01Z
dc.title.none.fl_str_mv Spatial resolution in GNSS-R under coherent scattering
title Spatial resolution in GNSS-R under coherent scattering
spellingShingle Spatial resolution in GNSS-R under coherent scattering
Camps Carmona, Adriano José|||0000-0002-9514-4992
Remote sensing
Coherent scattering
Fresnel zone
Global navigation satellite systems
Reflectometry (GNSS-R)
Spatial resolution
Teledetecció
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
title_short Spatial resolution in GNSS-R under coherent scattering
title_full Spatial resolution in GNSS-R under coherent scattering
title_fullStr Spatial resolution in GNSS-R under coherent scattering
title_full_unstemmed Spatial resolution in GNSS-R under coherent scattering
title_sort Spatial resolution in GNSS-R under coherent scattering
dc.creator.none.fl_str_mv Camps Carmona, Adriano José|||0000-0002-9514-4992
author Camps Carmona, Adriano José|||0000-0002-9514-4992
author_facet Camps Carmona, Adriano José|||0000-0002-9514-4992
author_role author
dc.subject.none.fl_str_mv Remote sensing
Coherent scattering
Fresnel zone
Global navigation satellite systems
Reflectometry (GNSS-R)
Spatial resolution
Teledetecció
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
topic Remote sensing
Coherent scattering
Fresnel zone
Global navigation satellite systems
Reflectometry (GNSS-R)
Spatial resolution
Teledetecció
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
description © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01
2020
2020-01-27
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/175851
https://dx.doi.org/10.1109/LGRS.2019.2916164
url https://hdl.handle.net/2117/175851
https://dx.doi.org/10.1109/LGRS.2019.2916164
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 RTI2018-099008-B-C21 SENSING WITH PIONEERING OPPORTUNISTIC TECHNIQUES
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 15,198674

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