Optical methods for data collection on spacecraft and aircraft have been in use for many decades. In the late 1970s, radar became a standard component in space-borne remote sensing systems. Radar imagers are especially useful for space-borne and airborne applications because in the microwave frequency band, they operate independent of atmospheric conditions like clouds, rain, snow, fog, daylight, etc. unlike optical imagers. Synthetic Aperture Radar (SAR) systems are radar imagers that exploit the collection of many independent samples of targets in a particular scene to produce intrinsically highresolution images and have several key advantages over airborne optical imagers