因测角误差、大气折射、判读误差等因素的影响,面面交会法计算的姿态角存在一定的误差,面面交会角较小时,甚至是错误的。文中通过判读获得空间目标在多台光电经纬仪靶面的方向矢量,建立非线性误差模型,并结合最小二乘法与L-M迭代法求解目标在空间的方向矢量,进而获得目标的姿态角。该方法可减少因面与面夹角较小带来误差或错误,计算精度较高。

Because of the influence of the angle error, the atmospheric refraction and the error of the interpretation, the attitude angle calculated by the plane intersection method had some errors, and when the plane intersection angle was small, the result was even wrong. In this paper, through the interpretation of the direction vector of space target on multiple photo-electric theodolite target surface, the nonlinear error model was established, and combined with the least square method and L-M iterative method for solving the direction vector of the target in space to get the target attitude angle. This method could reduce errors or mistakes due to the small angle between the surface and the surface, and the calculation accuracy was higher.