2004 年 43 巻 4 号 p. 29-34
GLI (Global Imager) is an imaging instrument that had been flying on ADEOS-II, a satellite launched in December 2003 as a part of JAXA's Earth observing programme. Precise geometric correction is one of the most difficult and indispensable process in remote sensing data. In this study, firstly, radiometric and geometric correc-tions were applied to 229 scenes of GLI levellb data over the world. Secondly, accuracy of system geometric correction was evaluated with the coastal lines using template matching technique. As a result, the root mean square geometric error was found to be 435-485m which corresponds to 1.7 pixel size in 250m resolution. The error vectors in one scene have the random distribution both in direction and size and it was found that the qualitative instrumental errors was not found in the system geolocation information. The whole processing system is developed as a package software under multi-platform environment and is freely available via the FTP site (ftp: //webgli.iis.u-tokyo.ac.jp/pub/gligeo/) .