SAR principle: Radar Basics - Synthetic Aperture Radar Swath explained: Side Looking Airborne Radar (SLAR) InSAR Digital Earth, by Hannes Dekyvere Example on InSAR: Volcano warning 手冊: InSAR Principles: Guidelines for SAR Interferometry Processing and Interpretation , ESA 衛星雷達及微波量測原理,衛星雷達與大氣、海洋遙測 ,成大衛星資訊研究中心 photo credit: Christian Wolff on radartutorial.eu