Satellite radar measurements for land subsidence detection
conference paper
In the Netherlands a project is running to investigate the potential of
satellite-borne interferometric Synthetic Aperture Radar to map deformation in
general and land subsidence due to gas extraction in particular. Synthetic Aperture
Radar is a side-looking radar that can detect both intensity and phase of the
backscattered microwave radiation with high resolution and accuracy. In SAR
repeat-pass interferometry, 2 passes of a (satellite) SAR system are combined. The
differential phase image is called an interferogram. It gives direct information on
very small (systematic) changes in distance between the satellite and the ground.
Because of the very stable orbit of the satellite, e.g. local height changes on the
ground will show up in the interferogram, and can be mapped quantitatively. The
project group chose two test-sites in the Netherlands that were covered by the
ERS-1 (ESA Remote Sensing Satellite), Groningen and Zeeland. This paper will
give a short introduction to SAR and SAR interferometry and will give examples
demonstrating the potential of this new technique. It will be shown that under
favourable conditions accuracies in the range of mm are feasible.
satellite-borne interferometric Synthetic Aperture Radar to map deformation in
general and land subsidence due to gas extraction in particular. Synthetic Aperture
Radar is a side-looking radar that can detect both intensity and phase of the
backscattered microwave radiation with high resolution and accuracy. In SAR
repeat-pass interferometry, 2 passes of a (satellite) SAR system are combined. The
differential phase image is called an interferogram. It gives direct information on
very small (systematic) changes in distance between the satellite and the ground.
Because of the very stable orbit of the satellite, e.g. local height changes on the
ground will show up in the interferogram, and can be mapped quantitatively. The
project group chose two test-sites in the Netherlands that were covered by the
ERS-1 (ESA Remote Sensing Satellite), Groningen and Zeeland. This paper will
give a short introduction to SAR and SAR interferometry and will give examples
demonstrating the potential of this new technique. It will be shown that under
favourable conditions accuracies in the range of mm are feasible.
TNO Identifier
94856
Publisher
Balkema, A.A.
Source title
Proceedings of the Fifth International Symposium on Land Subsidence, 16-20 October 1995, The Hague, The Netherlands
Editor(s)
Barends, F.J.B.
Brouwer, F.J.J.
Schroder, F.H.
Brouwer, F.J.J.
Schroder, F.H.
Place of publication
Rotterdam
Pages
169-177
Files
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