Synthetic Aperture Radar is a topic of great interest all over the world. SAR remote sensing is being used for Earth observation, geophysical applications and environmental monitoring. This book covers SAR theory, SAR data processing, and SAR applications using ALOS/PALSAR data. Particularly of interest are topics such as calibration, interferometry and SAR imaging of forested regions, disaster monitoring and the effects of climate change. It explains in detail the JAXA SAR products; large scale SAR imaging and SAR mosaicking. This book is the result of the authors' 30 year experience in SAR imaging.