Rail-borne SAR interferometry for Disaster Prevention
Konferenz: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06.06.2016 - 09.06.2016 in Hamburg, Germany
Tagungsband: EUSAR 2016
Seiten: 5Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Cantalloube, Hubert M. J.; Nouvel, Jean-Francois; Azarian, Sylvain; Cheraly, Anil; Roques, Serge; Oriot, Helene (ONERA, France)
Major railway disasters, such as line or infrastructure collapse, rock or water fall on the tracks, are often foreannounced by unnoticed precursors such as minute deformation of walls or water infiltration. ONERA & SNCF conducted a first experiment of change detection using cross-track interferometry & coherent change detection with a rail-borne synthetic aperture radar. The BuSARd airborne SAR pod was strapped on a flat wagon with its X-band horn antennae extended to the wagon corner in squinted across-track configuration. Preliminary results from a first set of acquisition trips allowed to assess the specific difficulties of SAR in this application. Compared to space/airborne SAR major difficulties are consequences of an extremely wide relative swath width (propagation gain range of 40 dB), a large angular baseline (at near range) & wider variation of along-track velocity (slowdown/stop for traffic regulation).