Ground-based radar interferometry for landslides monitoring: atmospheric and instrumental decorrelation sources on experimental data |
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Authors: | Luzi G Pieraccini M Mecatti D Noferini L Guidi G Moia F Atzeni C |
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Affiliation: | Dept. of Electron. & Telecommun., Univ. of Florence, Italy; |
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Abstract: | The application of ground-based radar interferometry for landslide monitoring is analyzed: a case study based on an experimental campaign carried out in Italy during 2002 is discussed. Interferometric data obtained from coherent synthetic aperture radar (SAR) images acquired by means of C-band ground-based equipment are analyzed. The campaign was aimed at retrieving potential terrain movements of a small landslide observed hundreds of meters away. Critical aspects related to spatial and temporal decorrelation are discussed: the use of optical photogrammetry as a technique for evaluating mechanical stability and correcting geometric distortion is presented. Results also confirmed that the application of ground-based radar interferometry can be attractive and effective if the acquired SAR images maintain an adequate coherence on different dates. |
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