航空機搭載リピートパス干渉SARによる地殻変動検出の可能性

抄録

Spaceborne repeat-pass SAR interferometry (RP-INSAR) is an excellent tool to detect the very slight earth crustal movements caused by an earthquake, a volcanic activity, and so on. In principal, an airborne SAR system has an ability to detect the movement as well. In order to realize an airborne RP-INSAR, the airplane must be flown on almost the same pass repeatedly and very precise airplane motion data are required to process the RP-INSAR data. We developed an X-band airborne RP-INSAR system with a D-GPS navigation system, and carried out the data correction using the phase information from corner reflectors set on the ground. As a result, we succeeded the airborne RP-INSAR processing. Furthermore, we tried to investigate an L-band airborne RP-INSAR system, and showed that L-band system is better than X-band system on the points of spatial decorrelation and surveying without reflectors in order to detect an earth crustal movement.