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Minimum mean square error space-varying filtering of interferometric SAR data / Gianfranco Fornaro in IEEE Transactions on geoscience and remote sensing, vol 40 n° 1 (January 2002)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 40 n° 1 (January 2002) . - pp 11 - 21 Titre : Minimum mean square error space-varying filtering of interferometric SAR data Type de document : Article/Communication Auteurs : Gianfranco Fornaro, Auteur ; M. Guarnieri, Auteur Année de publication : 2002 Article en page(s) : pp 11 - 21 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] erreur [Termes IGN] filtrage numérique d'image [Termes IGN] image radar moirée [Termes IGN] interféromètrie par radar à antenne synthétique Résumé : (Auteur) This paper adresses the problem of filtering interferometric sysnthetic aperture radar (IFSAR) signals in presence of nonplanar topography to mitigate geometrical decorrelation effects. The problem is space-variant. We assume knowledge about the scene topography and derive an optimal, minimum mean square error (MMSE), filtering procedure. The algorithms is flexible and, beside the standard stripmap-stripmap interferometry, it may be applied to IFSAR data acquired in any operative mode. For instance in scan-scan, scan-strip, and scan-spot interferometry. The scene topography contribution may be either derived from an external rough digital elevation model (DEM) or directly estimated from the SAR data. The filtering technique is extended to the azimuth direction to account for possible Doppler centroid decorrelation. Experimental results carried out on real data confirm the variability of the theory and show that filtering procedure allows us to obtain a reduction of the interferometric noise content. Its gain is particulary marked in the cases of steep topography, where application of the standard common band filters could deteriorate the signal quality, or for large Doppler centroid shifts between the two acquisitions. Numéro de notice : A2002-016 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.981345 En ligne : https://doi.org/10.1109/36.981345 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21933 [article]

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