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High-Resolution SAR Interferometry: Estimation of Local Frequencies in the Context of Alpine Glaciers

Vasile, Gabriel und Trouve, Emmanuel und Petillot, Ivan und Bolon, Philippe und Nicolas, Jean-Marie und Gay, Michele und Chanussot, Jocelyn und Landes, Tania und Grussenmeyer, Pierre und Buzuloiu, Vasile und Hajnsek, Irena und Andres, Christian und Keller, Martin und Horn, Ralf (2007) High-Resolution SAR Interferometry: Estimation of Local Frequencies in the Context of Alpine Glaciers. IEEE Transactions on Geoscience and Remote Sensing, 46 (4), Seiten 1079-1090. IEEE. DOI: 10.1109/TGRS.2007.912713.

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Synthetic aperture radar (SAR) interferometric data offer the opportunity to measure temperate glacier surface topography and displacement. The increase of the resolution provided by the most recent SAR systems has some critical implications. For instance, a reliable estimate of the phase gradient can only be achieved by using interferogram local frequencies. In this paper, an original two-step method for estimating local frequencies is proposed. The 2-D phase signal is considered to have two deterministic components corresponding to low-resolution (LR) fringes and high-resolution (HR) patterns due to the local microrelief, respectively. The first step of the proposed algorithm consists in the LR phase flattening. In the second step, the local HR frequencies are estimated from the phase 2-D autocorrelation function computed on adaptive neighborhoods. This neighborhood is the set of connected pixels belonging to the same HR spatial feature and respecting the “local stationarity” hypothesis. Results with bothsimulated TerraSAR-X interferograms and real airborne E-SAR images are presented to illustrate the potential of the proposed method.

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Titel:High-Resolution SAR Interferometry: Estimation of Local Frequencies in the Context of Alpine Glaciers
AutorenInstitution oder E-Mail-Adresse der Autoren
Vasile, GabrielUniversity of Savoie
Trouve, EmmanuelUniversity of Savoie
Petillot, IvanUniversity of Savoie
Bolon, PhilippeUniversity of Savoie
Nicolas, Jean-MarieEcole Nationale Superieure des Telecommunications
Gay, MicheleInstitute Nationale Polytechnique de Grenoble
Chanussot, JocelynInstitute Nationale Polytechnique de Grenoble
Landes, TaniaInstitute Nationale des Science Appliquees de Strabourg
Grussenmeyer, PierreInstitute Nationale des Science Appliquees de Strabourg
Buzuloiu, VasileUniversity Politechnique Bucarest
Datum:April 2007
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
DOI :10.1109/TGRS.2007.912713
Seitenbereich:Seiten 1079-1090
Stichwörter:Adaptive neighborhood, Experimental synthetic aperture radar (E-SAR), glacier monitoring, local frequencies, SAR interferometry (InSAR), TerraSAR-X.
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Prosmart, Smart-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme
Institut für Hochfrequenztechnik und Radarsysteme > SAR-Technologie
Hinterlegt von: Dr.rer.nat. Irena Hajnsek
Hinterlegt am:16 Dez 2008
Letzte Änderung:12 Dez 2013 20:35

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