Prof. Josaphat Tetuko Sri Sumantyo, Ph.D, is a professor in the Center for Environmental Remote Sensing, Chiba University, Japan. He has developed leading techniques in remote sensing to observe continent, ocean and atmosphere, using satellite data and remote sensing devices, especially SAR. Prof. Pakhrur Razi, Ph.D. is a professor in physics disaster from the Center of Disaster Monitoring and Earth Observation, Universitas Negeri Padang, Indonesia. His research interests include the prediction of potential disasters using geoscience and remote sensing technology.