抄録
An along-track stereo observation in the same orbit has been promoted in Japanese earth observa-tion satellites. It started with the satellite sensor JERS-1/OPS launched in 1992, followed by Terra/ASTER launched in 1999 and ALOS/PRISM launched in 2006. By continuous along-track stereo observation in long period, the multiple stereo data have been acquired globally. The global digital topographic model is produced by advanced automatic processing to huge amount of the stereo data. This global topographic model is used in evaluation of climate change, disaster prevention, and resource exploration at global or local scale on any areas on the earth.
