针对外测数据处理中对站点垂线偏差测量和使用的忽视,依据坐标系旋转和矩阵变换理论,推导站点垂线偏差对方位角和俯仰角的影响公式,进而推导对多站最小二乘交会定位结果的影响。仿真结果表明,某些站点垂线偏差对方位角的影响最大值超过设备测量精度值的2倍,对俯仰角的影响最大值超过设备测量精度值的50%,对飞行器定位的影响主要表现在X方向和Y方向上。为提高数据处理精度,有必要对站点垂线偏差进行修正。

The measurement and use of plumb line deviation is neglected in trajectory data processing, according to the theory of coordinate transformation and matrix relation, the formula that plumb line deviation affects azimuth and pitching angle is deduced in this paper, and it proposes that plumb line deviation leads up to the errors of least squares estimate result. Simulation results indicate that the influence of azimuth exceeds 2 times of the measurement accuracy value, the influence of pitching angle exceeds 50 percent of the measurement accuracy value, moreover, the effects to position comport in X and Y mostly. In order to improve the precision of data processing, the plumb line deviation of optical station ought to be corrected.