期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 8
页码：133-136
出版社：Copernicus Publications
摘要：The Pi-SAR is a dual-frequency airborne polarimetric and interferometric synthetic aperture radar(SAR). The frequencies of the system are X-band (9.55GHz) and L-band(1.27GHz). X-band SAR has been developed by NICT, and L-band SAR by JAXA. The two SAR systems are jointly equipped with the Gulfstream-II jet-aircraft and operated simultaneously or independently. The resolution for X-band radar has 1.5m and that for the L-band has 3m. The polarimetry function is possessed for both X-band and L- band system. In addition, the X-band has two antennas and has an interferometric function with 2.3 m baseline aiming at a three- dimensional observation. Three high-data-rate recorders achieve more than 10 km swath with full functions: dual frequency, polarimetry, interferometry, and full-resolution. Experiments and observation using this SAR system has been carried out in Japanese territory since 1995. Observations applied for various areas such as environments, forestry, agriculture, hydrology, geology, oceanography etc. had been carried out two or three times in every year usually. We had quasi-monthly observation applied to volcanic disasters in 2000. Volcano Usu and volcano of the Miyake-jima in 2000. Detail shapes and sizes of the craters were detected clearly for Usu volcano, and thick volcanic ashes covered over forests were discriminated from thin accumulation. The huge caldera appeared on the top of the Miyake-jima on July 8, 2000 was observed clearly by the Pi-SAR and sizes and depth are measured by its data. In 2004, widely disaster monitoring had been carried out by Pi- SAR after the earthquake in Niigata-Chuetsu. From 2006, the new system - Pi-SAR2 had been developed. The design concept of the radar system is aiming at more practical for disaster monitoring. The system has been completed in 2009
