User talk:Tehafred

Semi-active missiles do not require a CW (constant wave) signal. The early Hughes radar missiles AIM-4 series(GAR 1,3,and 11 used a low prf pulse illumination. Later missiles like the AIM47A (GAR-9) used illumination from the ASG-18 radar which was a high PRF Coherent pulse doppler radar. This system was tested in a B-58 (Snoopy) testbed and in the YF-12A "Blackbird" and proved the theory. It was the first 'lookdown/shootdown" system ever flown. It used the doppler from the target as described in the present SARH article. The system does require that the illuminating aircraft maintain a continuous track however to be succesful. The article also states that the missile will use a "constant bearing" track method.  The seeker mode does not dictate this, any steering technique will work!   I worked on all of these systems and any good radar reference will verify this data.    ref.  Introduction To Airborne Radar, by George W. Stimson, LIB of Congress # 83-83041. I am a 33 year HAC retiree Tehafred (talk) 00:01, 27 March 2012 (UTC)