立体基线法测向是相位干涉仪测向的一种,可以应用于复合制导的被动雷达导引头(passiveradarseeker,PRS)中。如果测向误差过大,将直接影响反辐射导弹(antiradarmissile,ARM)命中精度。文中对立体基线法的测向误差进行了详细的推导,得到了在天线围成正三角形时,方位角和仰角联合测向误差达到最小;定性的得到天线围成周长和测向误差成反比关系;半径波长比增大,测向误差减小等结论。并通过仿真验证了结论的正确性。

Direction finding with spatial baseline is a way of direction finding with interferometers, which can be applied to passive radar multi-mode seeker. If the direction finding error is too large, it could affect ARM shooting accuracy directly. For direction finding with spatial baseline, direction finding error was studied in detail. It shows that equilateral surrounded by the antenna, the azimuth and elevation combined error is minimum: It is quantitatively analyzed that the perimeter surrounded by antenna is inversely proportional to direction finding error; With radius-wavelength ratio increases, the direction finding error is reduced etc. The simulation result confirms the correctness of the conclusions.