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Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land

hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorFRAPPART, Frédéric
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorBLAREL, Fabien
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorPAPA, Fabrice
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA]
dc.contributor.authorPRIGENT, Catherine
hal.structure.identifierGéosciences Environnement Toulouse [GET]
dc.contributor.authorMOUGIN, Éric
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorPAILLOU, Philippe
hal.structure.identifierCentre d'études spatiales de la biosphère [CESBIO]
dc.contributor.authorBAUP, Frédéric
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
hal.structure.identifierGéosciences Environnement Toulouse [GET]
dc.contributor.authorZEIGER, Pierre
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
hal.structure.identifierMorphodynamique Continentale et Côtière [M2C]
dc.contributor.authorSALAMEH, Edward
hal.structure.identifierGéosciences Environnement Toulouse [GET]
dc.contributor.authorDARROZES, José
hal.structure.identifierGéosciences Environnement Toulouse [GET]
dc.contributor.authorBOURREL, Luc
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
dc.contributor.authorRÉMY, Frédérique
dc.date.issued2021
dc.identifier.issn0273-1177
dc.description.abstractEnRadar backscattering coefficients from synthetic aperture radars and scatterometers are commonly used to characterize the land surface properties and monitor their temporal evolution. Radar altimetry is mostly used, over land, to provide time series of water stage of lakes, rivers and wetlands and the topography of the ice sheets. Very few studies used the radar altimetry backscattering coefficients for geophysical applications except to determine changes in Arctic lakes state surface, surface soil moisture in semi-arid environments or flood extent at high latitude. As radar altimetry missions acquired data in four frequency bands (mostly C and Ku but also S and Ka), this study proposes the first thorough analysis of the backscattering signatures of land surfaces using observations from ERS-2, Jason-1, ENVISAT, Jason-2 and SARAL radar altimetry missions The spatial and temporal variations of several altimetric information (backscattering coefficient, waveform peakiness, leading edge width and trailing edge slope) are examined at global scale, for each frequency band separately, as well as for their differences. Their relationship with related variations in the surface characteristics (i.e., soil type, soil moisture, presence of water and snow) are evidenced. Finally, spatial patterns and temporal variations computed over selected regions, representative of the major bioclimatic areas, are related to their surface properties and changes.
dc.language.isoen
dc.publisherElsevier
dc.subject.enRadar altimetry
dc.subject.enBackscattering
dc.subject.enLand surface properties
dc.title.enBackscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land
dc.typeArticle de revue
dc.identifier.doi10.1016/j.asr.2020.06.043
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnement
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Géophysique [physics.geo-ph]
dc.subject.halSciences de l'ingénieur [physics]/Traitement du signal et de l'image
dc.subject.halSciences de l'environnement/Ingénierie de l'environnement
bordeaux.journalAdvances in Space Research
bordeaux.page989-1012
bordeaux.volume68
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-03045692
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03045692v1
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