Science Service System

Summary of Proposal GEO0165

TitleGround motion monitoring using TerraSAR-X DINSAR & IPTA
Investigator Wegmüller, Urs - Gamma Remote Sensing AG, R and D
Team Members
Mr. Spreckels, Volker - Deutsche Steinkohle AG, Geschaeftsbereich Geoinformation / Vermessung BG G
Dipl.-Ing. Walter, Diana - TU Clausthal, Inst. f. Geotechnik und Markscheidewesen
Benecke, Norbert - Deutsche Montan Technologie GmbH (DMT), Exploration & Geosurvey
SummaryDifferential SAR interferometry (DINSAR) and Interferometric Point Target Analysis (IPTA) will be used to monitor ground movements in selected parts/regions of a German mining area. The use of interferometric techniques within the monitoring of active mining here is well documented and therefore a state-of-the-art technology. In this case new aspects have to be considered. In the selected areas residual subsidence after the closure of underground coal mines can be observed in some parts but the main interest will be in the monitoring of the uplift expected from the flooding of the mines. A time series of interferometric TerraSAR-X data (stripmap, single polarization, 3m resolution, 30 km swath width) will be requested. The data will be analyzed using more conventional differential SAR interferometry as well as using the point target based interferometric approach IPTA, which was developed by GAMMA and already successfully applied to C- and L-band SAR. As compared to C-band a higher temporal decorrelation is expected for the X-band frequency, furthermore the high phase-to-deformation sensitivity is expected to complicate the interpretation of the differential interferometric phase in the case of higher deformation gradients. On the other hand the deformation monitoring potential will benefit from the high spatial resolution of the TerraSAR-X and its relatively short revisit interval. This is an important aspect in case of uplifts in areas with technically infrastructure and housing. The use of the TerraSAR-X data for the point target based interferometric approach will be of particular interest considering the high spatial resolution of the interferometric data and the relatively short revisit interval of 11 days. For this investigation we would like to obtain a significant interferometric data stack to evaluate and demonstrate the potential of TerraSAR-X for land surface deformation monitoring. The interferometric analysis of the TerraSAR-X data will be supported by ground-based measurement campaigns (leveling, GPS, permanent GOCA-GPS) and corner reflector installation. Furthermore, interferometric studies using C-band and L-band SAR are planned over the same test area. The selected areas are well suited for the planned investigation. For these sites there is a real monitoring demand and SAR interferometry shall play an important role in the integrated monitoring concept.

Back to list of proposals

© DLR 2004-2016