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Split-Band Interferometric SAR Processing Using TanDEM-X Data
De Rauw, Dominique; Kervyn, François; d'Oreye, Nicolas et al.
2015In ESA SP-731


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Keywords :
Split Band; InSAR; Absolute phase unwrapping; TanDEM-X; Volcanology; Nyiragongo
Abstract :
[en] Most recent SAR sensors use wide band signals to achieve metric range resolution. One can also take advantage of wide band to split it into sub-bands and generate several lower-resolution images, centered on slightly different frequencies, from a single acquisition. This process, named Multi Chromatic Analysis (MCA) corresponds to performing a spectral analysis of SAR images. Split-Band SAR interferometry (SBInSAR) is based on spectral analysis performed on each image of an InSAR pair, yielding a stack of sub-band interferograms. Scatterers keeping a coherent behaviour in each sub-band interferogram show a phase that varies linearly with the carrier frequency, the slope being proportional to the absolute optical path difference. This potentially solves the problems of phase unwrapping on a pixel-per-pixel basis. In this paper, we present an SBInSAR processor and its application using TanDEM-X data over the Nyiragongo volcano.
Research Center/Unit :
CSL - Centre Spatial de Liège - ULiège
Musée Royal de l'Afrique Centrale - MRAC
Musée National d'Histoire Naturelle - MNHN (Luxembourg)
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
De Rauw, Dominique  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Kervyn, François;  Musée royal de l'Afrique centrale
d'Oreye, Nicolas;  National Museum of Natural History
Smets, Benoit;  Musée royal de l'Afrique centrale
Albino, Fabien;  Musée royal de l'Afrique centrale
Barbier, Christian ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Language :
Title :
Split-Band Interferometric SAR Processing Using TanDEM-X Data
Publication date :
March 2015
Event name :
Event organizer :
Event place :
Frascati, Italy
Event date :
23 - 27 mars 2015
Audience :
Main work title :
ESA SP-731
Name of the research project :
Study and Monitoring of Virunga volcanoes using TanDEM-X (Vi-X)
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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since 31 March 2015


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