TERRASIGNA (former ASRC) has presented the first preliminary deformation map over Bucharest using the Differential Interferometric Synthetic Aperture Radar (DInSAR) stacking technique.
This technique has the advantage that it measures deformation information in a large number of points (thousands) over a long period of time, making possible a continuous monitoring of an urban area.
Bucharest represents a very good monitoring site because it is a high density urban area with very good radar backscaterring properties that lead to a good quality of the measurements.
The archived set of 43 ERS images covering the area of Bucharest between 1992 and 1999 was processed using the DInSAR stacking technique. These images were used to create a deformation map which identifies large areas of Bucharest that may suffer a subsidence motion that affects the buildings stability and increases the change of life loss and property damages.
Traditional measurements (GPS, levelling, photogrammetry) of subsidence are completely missing for the monitored area.
Deformation Map over Bucharest Using Differential Interferometry
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