| 摘要 |
1. Receiving apparatus capable of passively locating a remote emitting radar comprising, receiving means for intercepting and amplifying the pulses and echo signals from the radar so as to produce a video output, gate circuit means connected to receive said video output, gate control circuit means connected to energize said gate circuit means when reception of unreflected main power pulses from the emitting radar is anticipated so that the output of said gate circuit will be a series of pulses corresponding to said main power pulses, range sweep circuit means connected to receive said series of pulses from said gate circuit means and to produce a range sweep output for each of said pulses, indicator means connected to receive said range sweep output, circuit means designed to produce an azimuth sweep output in synchronization with each of said main power pulses received with maximum amplitude from the emitting radar, said azimuth sweep circuit means being connected so as to introduce said azimuth sweep output to said indicator means, and means for connecting said video output of said receiving means to said indicator means, said indicator means being designed to correlate said range sweep output, said azimuth sweep output, and said video output so as to present an indication representative of the radar map that could be observed at the emitting radar whereby the location of the emitting radar can be passively determined and the area surrounding the radar can be kept under passive surveillance.
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