A Mobile Passive Radar System - Paperbackby Markus Krckemeier (Author) Airspace surveillance is one of the classic applications of radar technology. Existing systems are focused on large scale surveillance of commercial airspace. This research presents a prototype of a small, mobile, passive radar system that for example can be used to monitor aircraft and UAVs in the airspace over maritime borders. The system is based on a coherent, software defined receiving system for data acquisition.