| 摘要 |
1. In a terrain contour mapping system in an aircraft, the combination of a dipole radar antenna consisting of two vertically spaced fan beam antenna poles mounted on the aircraft, means to transmit radar signals at a depressed angle from the antenna in directions normal to the flight path of the aircraft, means to measure and record the phase difference in the radar signals received at the two poles of the antenna when the signals are reflected from the earth, an inertial system to measure and record airborne platform orientation and position, means to combine the orientation and position information with the recorded radar information, and ground stationed means adapted to receive the combined information to provide a three coordinate output signal which determines points on a map representing the contour of the terrain flown over by the aircraft.
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