HR: 0800h
AN: G51C-0632    [Abstracts]
TI: Measurement of Surface Deformation using a Ground-based Real Aperture Interferometer
AU: * Werner, C L
EM: cw@gamma-rs.ch
AF: Gamma Remote Sensing AG, Worbstrasse 225, Guemligen, 3073, Switzerland
AU: Wiesmann, A
EM: weismann@gamma-rs.ch
AF: Gamma Remote Sensing AG, Worbstrasse 225, Guemligen, 3073, Switzerland
AU: Strozzi, T
EM: strozzi@gamma-rs.ch
AF: Gamma Remote Sensing AG, Worbstrasse 225, Guemligen, 3073, Switzerland
AU: Wegmueller, U
EM: wegmuller@gamma-rs.ch
AF: Gamma Remote Sensing AG, Worbstrasse 225, Guemligen, 3073, Switzerland
AB: Differential interferometry has proven as a technique to be very useful for the measurement of surface deformation relating to geophysical processes such as earthquakes, landslides, volcanoes, glaciers. Up until recently these measurements have been performed from data derived from space borne sensors such as ERS, Envisat, and Radarsat. These space borne sensors have the advantage of obtaining large area acquisitions but are limited in a number of ways. Most serious is the lack of dense temporal sampling due to long repeat times. Also due to the fixed orbit track, the number of views of the scene is limited. Ground based interferometry (GBI) has demonstrated the capability to continuously map the motion of landslides, glaciers, at mm scale. The advantages of ground-based observation include on-demand availability, the potential of continuous observations, and flexibility in selection of the observation geometry with very small baselines, high spatial resolution, and the potential to suppress atmospheric phase variations by averaging by acquisition of multiple images. GBI implementations up to this time have utilized a small antenna traveling along a linear rail. We have developed a new Terrestrial Radar Interferometer (TRI) operating at 17.2 GHz and utilizing a azimuthal rotating interferometric array of real-aperture antennas Because the two SLC images are created simultaneously, we can create an elevation model of the entire scene, even for scatterers that are incoherent. The scope of this paper is to describe the system and performance for generating height and deformation maps. We show some our first results mapping motion of the Rhône Glacier in Switzerland and the Tessina landslide near the city of Belluno in Northern Italy.
DE: 0720 Glaciers
DE: 1212 Earth's interior: composition and state (7207, 7208, 8105, 8124)
DE: 1294 Instruments and techniques
DE: 1810 Debris flow and landslides
SC: Geodesy [G]
MN: 2007 Fall Meeting