按平面几何关系，导出了双机在不同向飞行时，仅基于角度测量的无源测距公式。 一旦令两载机飞行方向间的夹角和两载机基线之间的偏转夹角趋于零，则即可得到沿同一直线飞行时的双机无源测距公式。测量误差分析表明，基于本文的测距算法，通过适当调整双机间的基线偏转角度，即可使整个探测区域上的测量误差都满足小于 5%R 的技术要求。
According to plane geometry relationship, the passive ranging formula for dual-aircraft in different direction flight is obtained by the angle measuring. As soon as the included angle between dual-aircraft directions and the deflection angle of baseline are going to zero, the passive ranging formula can be obtained when two aircrafts fly along the same straight line. Based on ranging algorithm derived from this paper, the measuring error analysis shows that the technical requirement less than 5%R within 90°range can be satisfied by properly adjusting the deflection angle of baseline between two aircrafts.
郁涛.仅基于角度测量的双机不同向无源测距公式[J].现代导航,2013,4(6):425-429
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