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dc.creatorLievens, Hanses_ES
dc.creatorVerhoest, Niko E. C.es_ES
dc.creatorKeyser, E. dees_ES
dc.creatorVernieuwe, Hildees_ES
dc.creatorMatgen, P.es_ES
dc.creatorÁlvarez-Mozos, Jesúses_ES
dc.creatorBaets, Bernard dees_ES
dc.identifier.issn1027-5606 (print)
dc.identifier.issn1812-2116 (electronic)
dc.description.abstractSoil moisture retrieval from Synthetic Aperture Radar (SAR) using state-of-the-art backscatter models is not fully operational at present, mainly due to difficulties involved in the parameterisation of soil surface roughness. Recently, increasing interest has been drawn to the use of calibrated or effective roughness parameters, as they circumvent issues known to the parameterisation of field-measured roughness. This paper analyses effective roughness parameters derived from C- and L-band SAR observations over a large number of agricultural seedbed sites in Europe. It shows that parameters may largely differ between SAR acquisitions, as they are related to the observed backscatter coefficients and variations in the local incidence angle. Therefore, a statistical model is developed that allows for estimating effective roughness parameters from microwave backscatter observations. Subsequently, these parameters can be propagated through the Integral Equation Model (IEM) for soil moisture retrieval. It is shown that fairly accurate soil moisture results are obtained both at C-and L-band, with an RMSE ranging between 4 vol% and 6.5 vol%.en
dc.description.sponsorshipThe research presented in this paper is funded by the Belgian Science Policy Office and the National Research Fund of Luxembourg in the frame of the Stereo II programme –project SR/00/100, and by the Spanish Government’s National Research, Development and Innovation Plan, project CGL2007- 63453/HID.en
dc.publisherCopernicus Publicationsen
dc.relation.ispartofHydrology and Earth System Sciences, 2011, 15(1). Págs. 151-162en
dc.rights© Author(s) 2011. CC Attribution 3.0 Licenseen
dc.subjectSurface scattering modelsen
dc.subjectSynthetic aperture radaren
dc.subjectIntegral equationen
dc.subjectBare soilsen
dc.subjectBackscatter modelsen
dc.subjectCorrelation lengthen
dc.subjectWater resourcesen
dc.titleEffective roughness modelling as a tool for soil moisture retrieval from C-and L-band SARen
dc.typeArtículo / Artikuluaes
dc.contributor.affiliationNafarroako Unibertsitate Publikoa. Landa Ingeniaritza eta Proiektuak Sailaeu
dc.contributor.affiliationUniversidad Pública de Navarra. Departamento de Proyectos e Ingeniería Rurales_ES
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.type.versionVersión publicada / Argitaratu den bertsioaes

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© Author(s) 2011. CC Attribution 3.0 License
Except where otherwise noted, this item's license is described as © Author(s) 2011. CC Attribution 3.0 License