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High Resolution Differential Interferometric Stacking via Adaptive Spatial Phase Filtering

Goel, Kanika and Adam, Nico (2011) High Resolution Differential Interferometric Stacking via Adaptive Spatial Phase Filtering. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 2011, Vancouver, Canada.

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Abstract

We present a new adaptive spatial filtering algorithm for accurate estimation of differential interferometric phase and coherence, to better support deformation monitoring techniques such as SBAS. The objective is high resolution interferometric phase estimation even in non-urban areas, where there is high phase noise. The typical method to enhance interferograms is a complex boxcar (rectangular) multilooking, leading to a low spatial resolution. This is a disadvantage, especially, with the launch of advanced SAR satellites such as TerraSAR-X. We propose a technique which provides improved interferograms without loosing the high geometrical resolution. Also, the coherence of the interferograms is estimated, which is important for various applications e.g. guiding phase unwrapping algorithms, selection of pixels for deformation monitoring etc. Our technique is based on identifying statistically homogenous pixels in a neighbourhood, and using them for phase flattening and finally, phase filtering via adaptive complex averaging (multilooking). We demonstrate our technique on TerraSAR-X data of Germany’s Bierwang gas reservoir.

Document Type:Conference or Workshop Item (Speech)
Title:High Resolution Differential Interferometric Stacking via Adaptive Spatial Phase Filtering
Authors:
AuthorsInstitution or Email of Authors
Goel, Kanikakanika.goel@dlr.de
Adam, NicoIMF, DLR
Date:July 2011
Page Range:pp. 1341-1344
Status:Published
Keywords:Differential Interferograms, Non-Urban Areas, High Resolution SAR, Phase Filtering, Small Baseline Subset Algorithm (SBAS).
Event Title:IEEE Geoscience and Remote Sensing Symposium (IGARSS), 2011
Event Location:Vancouver, Canada
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Kanika Goel
Deposited On:19 Aug 2011 09:29
Last Modified:08 May 2014 23:22

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