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Estimating sub-pixel surface roughness using remotely sensed stereoscopic data / A. Mushkin in Remote sensing of environment, vol 99 n° 1-2 (15 November 2005)  

Public [article]  inRemote sensing of environment > vol 99 n° 1-2 (15 November 2005) . - pp 75 - 83 Titre : Estimating sub-pixel surface roughness using remotely sensed stereoscopic data Type de document : Article/Communication Auteurs : A. Mushkin, Auteur ; A.R. Gillepsie, Auteur Année de publication : 2005 Article en page(s) : pp 75 - 83 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse infrapixellaire [Termes IGN] Californie (Etats-Unis) [Termes IGN] désert [Termes IGN] image Terra-ASTER [Termes IGN] Israël [Termes IGN] modèle stéréoscopique [Termes IGN] ombre [Termes IGN] radiance [Termes IGN] rugosité du sol Résumé : (Auteur) Surface roughness at the scale of 10-2-10-1 m can be estimated using the ratio (RR) between surface-reflected solar radiance measured from two view angles at nearly the same time. As RR is primarily a function of the difference between effective sub-pixel shading observed from the two view-angles, the divergence from unity RR values, which are expected for smooth Lambertian surfaces (they have no shadows), was found to be proportional to roughness at the 10-2-10-1 m scale of geomorphic desert surfaces. Ground-based RR values at 1-m resolution, as well as remotely acquired RR values at 4-, 15- and 50-m resolutions, were compared with observed surface roughness in two hyperarid test sites, located in Death Valley, California, USA and the southem Negev Desert in Israel. The ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) 15-m stereoscopic capability is identified as an effective resource for obtaining relative subpixel surface-roughness estimates that are largely independent of surface composition and relatively insensitive to atmospheric effects. Numéro de notice : A2005-441 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2005.02.018 En ligne : https://doi.org/10.1016/j.rse.2005.02.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27577 [article]