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dc.creatorÁlvarez-Mozos, Jesúses_ES
dc.creatorVerhoest, Niko E. C.es_ES
dc.creatorLarrañaga, Arantzazues_ES
dc.creatorCasalí Sarasíbar, Javieres_ES
dc.creatorGonzález de Audícana Amenábar, Maríaes_ES
dc.date.accessioned2014-05-14T07:35:03Z
dc.date.available2014-05-14T07:35:03Z
dc.date.issued2009
dc.identifier.issn1424-8220
dc.identifier.other713
dc.identifier.urihttps://hdl.handle.net/2454/10531
dc.description.abstractRadar-based surface soil moisture retrieval has been subject of intense research during the last decades. However, several difficulties hamper the operational estimation of soil moisture based on currently available spaceborne sensors. The main difficulty experienced so far results from the strong influence of other surface characteristics, mainly roughness, on the backscattering coefficient, which hinders the soil moisture inversion. This is especially true for single configuration observations where the solution to the surface backscattering problem is ill-posed. Over agricultural areas cultivated with winter cereal crops, roughness can be assumed to remain constant along the growing cycle allowing the use of simplified approaches that facilitate the estimation of the moisture content of soils. However, the field scale spatial variability and temporal variations of roughness can introduce errors in the estimation of soil moisture that are difficult to evaluate. The objective of this study is to assess the impact of roughness spatial variability and roughness temporal variations on the retrieval of soil moisture from radar observations. A series of laser profilometer measurements were performed over several fields in an experimental watershed from September 2004 to March 2005. The influence of the observed roughness variability and its temporal variations on the retrieval of soil moisture is studied using simulations performed with the Integral Equation Model, considering different sensor configurations. Results show that both field scale roughness spatial variability and its temporal variations are aspects that need to be taken into account, since they can introduce large errors on the retrieved soil moisture values.en
dc.description.sponsorshipPart of the research presented in this paper is funded by the Spanish Ministry for Science and Innovation in the frame of CGL2007-63453/HID project.en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherMDPIen
dc.relation.ispartofSensors, 2009, 9 (1). Págs. 463-489en
dc.rights© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution licenseen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.subjectSynthetic aperture radaren
dc.subjectSoil moisture retrievalen
dc.subjectSurface roughnessen
dc.subjectRemotely sensed dataen
dc.subjectBare soilsen
dc.subjectC-banden
dc.subjectBackscattering modelen
dc.subjectNeural networksen
dc.subjectProfile lengthen
dc.subjectScatteringen
dc.subjectScaleen
dc.subjectWateren
dc.titleInfluence of surface roughness spatial variability and temporal dynamics on the retrieval of soil moisture from SAR observationsen
dc.typeArtículo / Artikuluaes
dc.typeinfo:eu-repo/semantics/articleen
dc.contributor.affiliationUniversidad Pública de Navarra. Departamento de Proyectos e Ingeniería Rurales_ES
dc.contributor.affiliationNafarroako Unibertsitate Publikoa. Landa Ingeniaritza eta Proiektuak Sailaeu
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.identifier.doi10.3390/s90100463
dc.relation.publisherversionhttps://dx.doi.org/10.3390/s90100463
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dc.type.versioninfo:eu-repo/semantics/publishedVersionen


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© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.
This article is an open-access article distributed under the terms and conditions of the Creative
Commons Attribution license
Except where otherwise noted, this item's license is described as © 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license