Dr. Dasapta Erwin Irawan is as Visiting Reseacher of Josaphat Laboratory in period of November 17 – December 15, 2009 with research theme as “Hydrological mapping in volcanic areas with the aid of synthetic aperture radar (SAR)”. He is a Lecturer, Faculty of Earth Sciences and Technology Research Division on Applied Geology, Intitute of Technology Bandung, Indonesia.