Alpine glacier 3D displacement derived from ascending and descending TerraSAR-X images on Mont-Blanc test site

Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany

Proceedings: EUSAR 2010

Pages: 4Language: englishTyp: PDF

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Fallourd, Renaud; Vernier, Flavien; Yan, Yajing; Trouvé, Emmanuel; Bolon, Philippe (Laboratoire d’Informatique, Systèmes, Traitement de l’Information et de la Connaissance, LISTIC-Polytech Annecy-Chambéry, Université de Savoie, France)
Fallourd, Renaud; Tupin, Florence; Nicolas, Jean-Marie (Institut TELECOM, TELECOM ParisTech, CNRS LTCI, France)
Harant, Olivier; Gay, Michel; Vasile, Gabriel (Grenoble-Image-sPeech-Signal-Automatics Lab, GIPSA-lab DIS/SIGMAPHY, CNRS - Grenoble INP, France)
Moreau, Luc (Environnements DYnamiques et TErritoires de Montagne, EDYTEM, CNRS - Université de Savoie, France)
Walpersdorf, Andrea; Cotte, Nathalie; Mugnier, Jean-Louis (ISTerre: Laboratoire de Géophysique Ineterne Tectonophysique (LGIT) and Labortoire de Géodynamique des Chaînes Alpines (LGCA) - Grenoble Université, France)

This paper explores the possibilities to estimate the 3D displacement field of Alpine glaciers by using high resolution TerraSAR-X images. The amplitude correlation technique applied on 11-day repeat pass data provides two projections of the surface displacement. The combined use of ascending and descending data acquired over almost the same period provides 4 different projections which can be geocoded and inverted to derive the 3D displacement field. Experimental results are presented on the Argentière glacier with stripmap HH images acquired over the Mont Blanc test site (Chamonix, France) during summer 2009. The results are compared with the available ground truth in the textured areas and on artificial targets (corner reflectors) installed on the glacier.