Bistatic passive radar system with improved ranging

摘要

A bistatic passive radar system having a display; a first directional antenna for determining the angle between the reference azimuth of the bistatic passive radar system and the line of sight to a host transmitter; an omnidirectional antenna for receiving reflected radar pulses from targets at any bearing; and a second directional antenna for determining the angle B between the line of sight to the host transmitter and a second line which extends from the bistatic passive radar system to a selected target. The angle of the second directional antenna is indicated by a B cursor on the display. The system includes a bistatic range correction circuit that utilizes an empirical determination of the distance D between the bistatic passive radar system and the host transmitter for determining the correct range for display of a selected target. The distance D is manually varied on the display until the B cursor on the display bisects the video image of a selected target toward which the second directional antenna is pointing. This technique is applicable for all targets and receivers that lie in the plane of rotation of the host radar.