Soldiers are often tasked to perform reconnaissance and surveillance in unknown, hostile environments. Missions may require an operative to search for specific assets. However, these assets may be placed out of visual range and in a zone with insufficient mapping of the area, building or structure. Assets including people, money, electronics, weapons, chemicals and documents may be stored in purpose-built hidden compartments that are visually undetectable. Retrieving these items becomes nearly impossible in a fully enclosed space.
Ideally, a soldier would have an alternate, superior means to scan and detect hidden chambers electronically. There are a number of sensing technologies for through wall interrogation which range from electromagnetic- (EM) to acoustic- to thermal-based techniques. Of these technologies, radar waves are the leading technology because they can penetrate walls effectively and image an area under any conditions of light, temperature and weather.