 HISAR is a lower-cost derivative of the ASARS-2 package that Hughes developed for the Lockheed U-2.HISAR is also fitted in the US Army's RC-7B Airborne Reconnaissance Low Multifunction (ARLM) manned surveillance aircraft, and is being sold on the international market.HISAR integrates a SAR-MTI system, along with an optical and an infrared imager.