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RESEARCH PRODUCT
SMOS REFLEX 2003: L-band emissivity characterization of vineyards
Daniel SelvaAlessandra MonerrisJ.f. FerrerRoberto SabiaNuria DuffoK. SalehCarmen AntolínM. Vall-llosseraAdriano CampsFrancesc TorresIgnasi CorbellaErnesto Lopez-baezasubject
Canopy010504 meteorology & atmospheric sciencesUniversitat Politecnica de CatalunyaOceanografia -- Instruments0211 other engineering and technologiesMicrowave measurements02 engineering and technologyradiometryAtmospheric sciencesSensors remots01 natural sciencesvineyardsHidrologia -- Aparells i instrumentssoil emissionWater contentGeophysical instrumentsmicrowave measurementValencia Anchor StationRemote sensing[INFO.INFO-IA] Computer Science [cs]/Computer Aided EngineeringL-band emissivitysoil roughnessVegetació -- CartografiaOpacitysoil temperaturevegetation mappingOceanographic instrumentsBoundary layer (Meteorology)VineyardsoilGeofísica -- Aparells i instrumentsCapa límit (Meteorologia)Hydrological instrumentsEmissivity:Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones radiofreqüència i ones mil·limètriques [Àrees temàtiques de la UPC]RadiometriaElectrical and Electronic EngineeringL-band microwave radiometry021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingReference Pixel L-Band ExperimentRadiometervegetation layersopacity15. Life on land[INFO.INFO-IA]Computer Science [cs]/Computer Aided EngineeringAD 2003 06 to 07SMOS REFLEX 2003:Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció [Àrees temàtiques de la UPC]Soil waterMicroones -- MesuramentL-band Automatic RadiometerGeneral Earth and Planetary SciencesEnvironmental scienceRadiometryhydrological techniquesSoil Moisture and Ocean Salinity missionsoil moistureLAURAland microwave emissionalbedodescription
The goal of the Soil Moisture and Ocean Salinity mission over land is to infer surface soil moisture from multiangular L-band radiometric measurements. As the canopy affects the microwave emission of land, it is necessary to characterize different vegetation layers. This paper presents the Reference Pixel L-Band Experiment (REFLEX), carried out in June-July 2003 at the Vale/spl grave/ncia Anchor Station, Spain, to study the effects of grapevines on the soil emission and on the soil moisture retrieval. A wide range of soil moisture (SM), from saturated to completely dry soil, was measured with the Universitat Polite/spl grave/cnica de Catalunya's L-band Automatic Radiometer (LAURA). Concurrently with the radiometric measurements, the gravimetric soil moisture, temperature, and roughness were measured, and the vines were fully characterized. The opacity and albedo of the vineyard have been estimated and found to be independent on the polarization. The /spl tau--//spl omega/ model has been used to retrieve the SM and the vegetation parameters, obtaining a good accuracy for incidence angles up to 55/spl deg/. Algorithms with a three-parameter optimization (SM, albedo albedo, and opacity) exhibit a better performance than those with one-parameter optimization (SM). Peer Reviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-05-31 |