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Retrieval of surface roughness using multi-polarized Envisat-1 ASAR data / H.s Srivastava in Geocarto international, vol 23 n° 1 (February - March 2008)  

Public [article]  inGeocarto international > vol 23 n° 1 (February - March 2008) . - pp 67 - 77 Titre : Retrieval of surface roughness using multi-polarized Envisat-1 ASAR data Type de document : Article/Communication Auteurs : H.s Srivastava, Auteur ; P. Patel, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 67 - 77 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] distribution spatiale [Termes IGN] données polarimétriques [Termes IGN] image Envisat-ASAR [Termes IGN] polarimétrie radar [Termes IGN] polarisation [Termes IGN] radargrammétrie [Termes IGN] rétrodiffusion [Termes IGN] rugosité du sol Résumé : (Auteur) Spatial distribution of surface roughness is very critical information for many application areas. Surface roughness is often characterized using statistical distribution. However, due to the huge complexity associated with spatial soil surfaces it is difficult to accurately characterize surface roughness over large areas using statistical distribution. Surface roughness influences SAR backscatter significantly and therefore for bare soil surfaces, surface roughness plays a critical role in determining the degree of depolarization of the SAR signal. In this paper, surface roughness is retrieved using multi-polarized Envisat-1 ASAR data. The depolarization ratio [ó°VH - ó°VV] has been found to be very sensitive to surface roughness. This study demonstrates an approach that can be used to retrieve quantitative surface roughness values from a space platform without making any assumptions regarding distribution of surface roughness on the ground. Copyright Taylor & Francis Numéro de notice : A2008-022 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040701538157 Date de publication en ligne : 06/12/2007 En ligne : https://doi.org/10.1080/10106040701538157 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29017 [article]

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