Hong Kong
Image 1 3D View of Urban Radar Targets
80 TerraSAR-X images have been processed to detect targets in the city of Hong Kong. Sarproz can export results in different formats and geocode both images and point clouds. Examples here are visualized in Google Earth.
Image 2 Example of time series of a detected target showing a progressive displacement.
Image 3 Reflectivity map geocoded in Google Earth together with 3D buildings.
Image 4 Corner Reflectors installed in Hong Kong for demonstration and validation purposes.
Building Collapse
In 2010 a building suddenly collapsed in Hong Kong. The time series processed by Sarproz show that the building suffered a well detected acceleration before the collapse. The data were acquired by TerraSAR-X.
Learn more about it here.
Time Series showing collapse precursor in Hong Kong (TSX data)
Dam
Time series of the displacement induced by the reservoir water level
The image shows a Dam in Hong Kong. The time series detected by Sarproz reveal that the dam has a displacement that is proportional to the water level of the reservoir.
Learn more about it here.
Leaning Building
The colored dots show that a linear displacement trend is affecting progressively the building from the bottom (stable) to the top (moving). The slight movement reveals the millimetric tilting of the structure. Data were acquired by TerraSAR-X in Hong Kong.
Leaning Building in Hong Kong
Bridge
Thermal expansion of a bridge in Hong Kong
The colorscale on the left represents the thermal expansion coefficient estimated by Sarproz from InSAR time series (two examples are displayed on the right). The bridge in the picture is expanding horizontally, and this explains why the west side is approaching the satellite viewing direction while the east side is moving away. Data were acquired by TerraSAR-X along an ascending orbit, and the satellite is right-looking.