InSAR analysis of Miyake-jima volcano with Radarsat images

Abstract

A volcanic island, Miyake-jima, has erupted since the end of June 2000. Fifteen Radarsat images of the island are analyzed and eight fine interferograms are produced with a newly developed enhance filter although the island is covered with vegetation. Eleven GPS stations were set since 1998 in the island, but most of them stopped working mainly because of failure of the electric power supply. Differential SAR interferometry could detect crustal deformation in space continuously and is the only way to monitor crustal deformation caused by the volcanic activity. Orbital base lines of pairs of SAR images are corrected using GPS data.