RADAR SET AN/APQ-89; DRIFT ANGLE GROUND SPEED ATTACHMENT

Research is reported on the development of a small lightweight attachment to modern attack radar systems which will provide essential navigation information. Conventional Doppler navigators are too large, too heavy, and too expensive for many applications. By utilizing radar equipment already present in an aircraft, the proposed attachment can be made small, light inexpensive, and easy to maintain. Research has 2 main objectives: (1) to modify the design of the present drift angle attachment as necessary for use at K band and adapt it for use with radar set AN/APQ-89(XAN-1); and (2) to develop a technique for extracting ground speed information from the radar signal.