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

Vasile, Gabriel and Trouve, Emmanuel and Petillot, Ivan and Bolon, Philippe and Nicolas, Jean-Marie and Gay, Michele and Chanussot, Jocelyn and Landes, Tania and Grussenmeyer, Pierre and Buzuloiu, Vasile and Hajnsek, Irena and Andres, Christian and Keller, Martin and 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), pp. 1079-1090. IEEE. DOI: 10.1109/TGRS.2007.912713.

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Abstract

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.

Document Type:Article
Additional Information:©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Title:High-Resolution SAR Interferometry: Estimation of Local Frequencies in the Context of Alpine Glaciers
Authors:
AuthorsInstitution or Email of Authors
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
Hajnsek, IrenaUNSPECIFIED
Andres, ChristianUNSPECIFIED
Keller, MartinUNSPECIFIED
Horn, RalfUNSPECIFIED
Date:April 2007
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Volume:46
DOI:10.1109/TGRS.2007.912713
Page Range:pp. 1079-1090
Publisher:IEEE
Status:Published
Keywords:Adaptive neighborhood, Experimental synthetic aperture radar (E-SAR), glacier monitoring, local frequencies, SAR interferometry (InSAR), TerraSAR-X.
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Prosmart, Smart-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr.rer.nat. Irena Hajnsek
Deposited On:16 Dec 2008
Last Modified:12 Dec 2013 20:35

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