Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) is an international conference devoted to SAR technology development and applications and Co-Sponsored by Institute of Electronics, Information and Communication Engineers (IEICE), Japan and IEEE Geosciences and Remote Sensing Society (GRSS) All Japan Joint Chapter. The APSAR is a forum of Synthetic Aperture Radar (SAR) engineers and scientists from all over the world, especially from the Asia-Pacific region. The bi-annual APSAR conference is held every two years in China, Japan, Korea, Australia, and Singapore in turn, and The 9th Asia-Pacific Conference on Synthetic Aperture Radar was planned to be held in Matsue, Shimane, Japan.