After the severe earthquake and tsunami in Japan, the International Charter ‘Space and Major Disasters’ was activated on the morning of the 11 March 2011. All participating institutions were asked to provide satellite imagery of the affected area.
“The information acquired by the German TerraSAR-X radar satellite and the RapidEye imaging satellites, together with data from the American WorldView-2 satellite, show the extent of the disaster,” explains Stefan Voigt, a researcher at DLR. “The advantage of satellite data is the extensive coverage of the disaster area that it provides. At the same time, we can map details with a spatial resolution of down to 50 centimetres. In the maps we have compiled, it can be seen that the tsunami penetrated 4–5 kilometres inland. The severe damage to roads, bridges, buildings and other infrastructure can be clearly seen. This is important information for rescue workers on the ground. We are working closely with the German Federal Agency for Technical Relief (Bundesanstalt Technisches Hilfswerk; THW).”
The scientists and engineers at ZKI began working to provide the necessary assistance immediately after the charter was activated. In close coordination with the control centre and commercial satellite operators, the available satellites were tasked for data acquisition over the disaster area. Since the activation of the charter, an enormous amount of data has been received, processed, analysed, and used to generate the first mapping products; meanwhile, archived data serve as a reference. The damage analysis and situation report are based on the newly acquired satellite images.
Published by: DLR on March 12, 2011