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Auteur Gianfranco Fornaro |
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CAESAR: an approach based on covariance matrix decomposition to improve multibaseline–multitemporal interferometric SAR processing / Gianfranco Fornaro in IEEE Transactions on geoscience and remote sensing, vol 53 n° 4 (April 2015)
[article]
Titre : CAESAR: an approach based on covariance matrix decomposition to improve multibaseline–multitemporal interferometric SAR processing Type de document : Article/Communication Auteurs : Gianfranco Fornaro, Auteur ; Simona Verde, Auteur ; Diego Reale, Auteur ; Antonio Pauciullo, Auteur Année de publication : 2015 Article en page(s) : pp 2050 - 2065 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] analyse en composantes principales
[Termes IGN] décomposition d'image
[Termes IGN] image Cosmo-Skymed
[Termes IGN] image radar moirée
[Termes IGN] interferométrie différentielle
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] matrice de covariance
[Termes IGN] surveillance géologique
[Termes IGN] tomographie radarRésumé : (Auteur) Synthetic aperture radar (SAR) tomography has been strongly developed in the last years for the analysis at fine scale of data acquired by high-resolution interferometric SAR sensors as a technique alternative to classical persistent scatterer interferometry and able to resolve also multiple scatterers. SqueeSAR is a recently proposed solution which, in the context of SAR interferometry at the coarse scale analysis stage, allows taking advantage of the multilook operation to filter interferometric stacks by extracting, pixel by pixel, equivalent scattering mechanisms from the set of all available interferometric measurement collected in the data covariance matrix. In this paper, we investigate the possibilities to extend SqueeSAR by allowing the identification of multiple scattering mechanisms from the analysis of the covariance matrix. In particular, we present a new approach, named “Component extrAction and sElection SAR” algorithm, that allows taking advantage of the principal component analysis to filter interferograms relevant to the decorrelating scatterer, i.e., scatterers that may exhibit coherence losses depending on the spatial and temporal baseline distributions, and to detect and separate scattering mechanisms possibly interfering in the same pixel due to layover directly at the interferogram generation stage. The proposed module allows providing options useful for classical interferometric processing to monitor ground deformations at lower resolution (coarse scale), as well as for possibly aiding the data calibration preliminary for the subsequent full-resolution interferometric/tomographic (fine scale) analysis. Results achieved by processing high-resolution Cosmo-SkyMed data, characterized by the favorable features of a large baseline span, are presented to explain the advantages and validate this new interferometric processing solution. Numéro de notice : A2015-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2014.2352853 Date de publication en ligne : 29/09/2014 En ligne : https://doi.org/10.1109/TGRS.2014.2352853 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75897
in IEEE Transactions on geoscience and remote sensing > vol 53 n° 4 (April 2015) . - pp 2050 - 2065[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2015041 RAB Revue Centre de documentation En réserve L003 Disponible 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)
[article]
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 synthétiqueRésumé : (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
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 1 (January 2002) . - pp 11 - 21[article]Réservation
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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