Patent ID: 7898458
Filing Date: 2011-03-01
Classification: G01S

Abstract:
1. A disaster countermeasure support method of causing a radar device mounted on an artificial satellite having a predetermined number of orbit returning days to acquire radar image data of an image acquiring object over a period including an emergency countermeasure time after occurrence of a disaster and a recovering and rebuilding time and causing a data analysis device to use the radar image data obtained as a result of image acquiring to provide desired information, comprising: causing the radar device to acquire an image of the image acquiring object from one of a plurality of orbits of the artificial satellite at an emergency countermeasure time after the occurrence of the disaster in a fewer number of days than the predetermined number of orbit returning days, and to obtain radar image data thereof; causing the data analysis device to receive the radar image data acquired at the emergency countermeasure time after the occurrence of the disaster from the radar device; causing the data analysis device to extract a change region from a difference of image data containing the image acquiring object and pre-generated at a usual time before the occurrence of the disaster and the radar image data acquired at the emergency countermeasure time after the occurrence of the disaster, and to create a first change extraction chart at the emergency countermeasure time from the extracted change region; causing the radar device to periodically obtain periodic radar image data of the image acquiring object after obtaining the radar image data acquired at the emergency countermeasure time after the occurrence of the disaster; causing the data analysis device to obtain periodic radar image data periodically acquired after the occurrence of the disaster from the radar device; and causing the data analysis device to extract a change region from a difference of the radar image data acquired at the emergency countermeasure time after the occurrence of the disaster and the periodic radar image data periodically acquired after the occurrence of the disaster, and to create a change extraction chart at the recovering and rebuilding time from the extracted change region, wherein the creating the change extraction chart at the emergency countermeasure time is performed by causing the data analysis device to extract a pixel or a set of pixels for which the difference of the two image data satisfies a predetermined first threshold as the change region, and to create the change extraction chart from the extracted change region, the first threshold used to analyze data at the emergency countermeasure time is set up according to information about the image acquiring object, the information being obtained by analyzing the image data pre-generated at the usual time before the occurrence of the disaster, the creating the change extraction chart at the recovering and rebuilding time is performed by causing the data analysis device to extract a pixel or a set of pixels for which the difference of the two image data satisfies a predetermined second threshold as the change region and create the change extraction chart from the extracted change region, and the second threshold used to analyze data at the recovering and rebuilding time is set up according to information about the image acquiring object, the information being obtained by analyzing the image data pre-generated at the usual time.