This book is Sang-Ho Yun's Ph.D. work at Stanford University. It contains radar image processing parts and geophysical modeling parts. The data processing parts introduce an optimal algorithm to recover missing regions of digital elevation model (DEM) and an algorithm to form an interferometric radar image of large ground deformation. The geophysical modeling parts describe a new method to estimate the detailed shape and the pressure of underground cracks filled with liquid such as low viscous magma. The new techniques in both parts are applied to volcano deformation modeling of the eruption...