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Geolocation and pointing accuracy analysis for the WindSat sensor / W.E. Purdy in IEEE Transactions on geoscience and remote sensing, vol 44 n° 3 (March 2006)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 44 n° 3 (March 2006) . - pp 496 - 505 Titre : Geolocation and pointing accuracy analysis for the WindSat sensor Type de document : Article/Communication Auteurs : W.E. Purdy, Auteur ; P.W. Gaiser, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 496 - 505 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] capteur spatial [Termes IGN] erreur systématique [Termes IGN] polarimétrie [Termes IGN] précision du positionnement [Termes IGN] radiométrie [Termes IGN] WINDSAT Résumé : (Auteur) Geolocation and pointing accuracy analyses of the WindSat flight data are presented. The two topics were inter-twined in the flight data analysis and will be addressed together. WindSat has no unusual geolocation requirements relative to other sensors, but its beam pointing knowledge accuracy is especially critical to support accurate polarimetric radiometry. Pointing accuracy was improved and verified using geolocation analysis in conjunction with scan bias analysis. Two methods were needed to properly identify and differentiate between data time tagging and pointing knowledge errors. Matchups comparing coastlines indicated in imagery data with their known geographic locations were used to identify geolocation errors. These coast-line matchups showed possible pointing errors with ambiguities as to the true source of the errors. Scan bias analysis of U, the third Stokes parameter, and of vertical and horizontal polarizations provided measurement of pointing offsets resolving ambiguities in the coastline matchup analysis. Several geolocation and pointing bias sources were incrementally eliminated resulting in pointing knowledge and geolocation accuracy that met all design requirements. Numéro de notice : A2006-136 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2005.858415 En ligne : https://doi.org/10.1109/TGRS.2005.858415 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27863 [article]

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