Centre de documentation
scientifique

Microwave land emissivity calculations using AMSU measurements / Fatima Karbou in IEEE Transactions on geoscience and remote sensing, vol 43 n° 5 (May 2005)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 43 n° 5 (May 2005) . - pp 948 - 959 Titre : Microwave land emissivity calculations using AMSU measurements Type de document : Article/Communication Auteurs : Fatima Karbou, Auteur ; C. Prigent, Auteur Année de publication : 2005 Article en page(s) : pp 948 - 959 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] Advanced Microwave Sounding Unit [Termes IGN] emissivité [Termes IGN] image DMSP-SSM/I [Termes IGN] image NOAA-AMSU [Termes IGN] surface du sol [Termes IGN] télédétection en hyperfréquence Résumé : (Auteur) Atmospheric parameter retrievals over land from Advanced Microwave Sounding Unit (AMSU) measurements, such as atmospheric temperature and moisture profiles, could be possible using a reliable estimate of the land emissivity. The land surface emissivities have been calculated using six months of data, for 30 beam positions (observation zenith angles from 58° to +58°) and the 23.8-, 31.4-, 50.3-, 89-, and 150-GHz channels. The emissivity calculation covers a large area including Africa, Eurasia, and Eastern South America. The day-to-day variability of the emissivity is less than 2% in these channels. The angular and spectral dependence of the emissivity is studied. The obtained AMSU emissivities are in good agreement with the previously derived SSMI ones. The scan asymmetry problem has been evidenced for AMSU-A channels. And possible extrapolation of the emissivity from window channels to sounding ones has been successfully tested. Numéro de notice : A2005-214 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2004.837503 En ligne : https://doi.org/10.1109/TGRS.2004.837503 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27351 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-05051	RAB	Revue	Centre de documentation	En réserve L003	Disponible