See: Claude Poher, “3.4. Refining the B-52 Position With Terrain Features,” in Analysis of Radar and Air-Visual UFO Observations on 24 October 1968 at Minot Air Force Base, ND (2005). Resolving the B-52 altitude in radarscope photo #783, see: Poher, “4.7. Discussion 1: The B-52 Altitude and the Tilt-up Angle of the Radar Antenna.”