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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]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-02012	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-02011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

On the estimation of radar polarization orientation shifts induced by terrain slopes / Jong-Sen Lee 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 30 - 41 Titre : On the estimation of radar polarization orientation shifts induced by terrain slopes Type de document : Article/Communication Auteurs : Jong-Sen Lee, Auteur ; et al., Auteur Année de publication : 2002 Article en page(s) : pp 30 - 41 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] bande L [Termes IGN] détail topographique [Termes IGN] données polarimétriques [Termes IGN] erreur [Termes IGN] matrice de covariance [Termes IGN] onde électromagnétique [Termes IGN] pente [Termes IGN] polarisation [Termes IGN] radar à antenne synthétique Résumé : (Auteur) In recent studies, Schuler et al. applied polarimetric imaging radar-derived orientation angles to measure topography, and Lee et al. used orientation angles for polarimetric SAR data compensation, to ensure acurately estimateation of geophysical parameters in regged terrain areas. To support these applications, its is important to accurately estimate shifts in orientation angles induced by azimuth slope variations. However, in many cases, inconsistency in the estimation of orientation angle shifts was encountered in several areas, introducing moisy and erroneous results. In this paper, we developp a unified analysis of estimation algorithms based on the circular polarization covariance matrix. The concept of reflection symmetry is used to explain the soundness of the circular polarization method and to show problems associated with other algorithms. L-band polarimetric synthetic aperture radar (SAR) images of Camp Roberts, CA, are used to substantiate this theory. Numéro de notice : A2002-017 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/36.981347 En ligne : https://doi.org/10.1109/36.981347 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21934 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-02012	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-02011	RAB	Revue	Centre de documentation	En réserve L003	Disponible