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Stereo cloud-top heights and cloud fraction retrieval from ATSR-2 / J.P. Muller in International Journal of Remote Sensing IJRS, vol 28 n° 9 (May 2007)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 28 n° 9 (May 2007) . - pp 1921 - 1938 Titre : Stereo cloud-top heights and cloud fraction retrieval from ATSR-2 Type de document : Article/Communication Auteurs : J.P. Muller, Auteur ; M.-A. Denis, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1921 - 1938 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] appariement automatique [Termes IGN] données météorologiques [Termes IGN] épaisseur de nuage [Termes IGN] image ERS-ATSR [Termes IGN] température de luminance [Termes IGN] traitement automatique de données Résumé : (Auteur) An operational processing system is described for the automated retrieval of cloud-top heights (CTHs) and amounts from the Gridded Brightness Temperature (GBT) 1 km product derived from the dual view of the Along Track Scanning Radiometer (ATSR-2) instrument onboard the ESA ERS-2 satellite. A new stereo matching algorithm, called M4 is described together with the overall processing chain for retrieving cloud-top heights and amounts. M4 is based on the successful stereo matchers, M2 and M3 which have been in operation with the NASA MISR sensor since March 2000 and which have also been applied to mapping cloud fraction in the polar region using ATSR-2 (Cawkwell and Bamber 2002, Cawkwell et al. 2001). Results in companion papers (Naud et al., Denis et al. 2007) describe the accuracy achieved using this algorithm and detailed scene-by-scene results are available from http://cloudmap.org under results->UCL->ATSR-2 Validation. We assess the impact of cloud-top winds on the accuracy of the retrieved cloud-top heights and conclude that for most middle and lower tropospheric clouds, cloud-top winds will have little, if any, noticeable impact. We show how ATSR-2 cloud-top heights at the different wavelengths (particularly visible compared with thermal IR) can sometimes yield information on multi-layer clouds which is unique to ATSR-2. The processing system has recently been applied to three years of ASTR-2 GBT data and results are shown. These results are available from the British Atmospheric Data Centre. Copyright Taylor & Francis Numéro de notice : A2007-277 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160601030975 En ligne : https://doi.org/10.1080/01431160601030975 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28640 [article]

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