高空光测系统误差的恒星法修正

Systematic Error Correction for High Trajectory Optical Measurement Based on Fixed Star

在高空目标光学测量中,由于设备和环境条件的影响,数据存在一定的系统误差,系统误差修正是获取高精度位置参数的关键。针对高空光测系统误差修正问题,首先分析了80km以上目标光测数据的系统误差来源,建立了高空目标光测数据的系统误差模型,提出了基于恒星的修正方法,对大气折射误差和设备轴系误差进行联合修正。为验证方法的有效性,将该方法应用于实际高空光学测量,实验结果表明修正效果明显,可使系统误差修正精度提高到2″。

Due to the measuring equipment and the influence of environment, there are some systematic errors in the data of high trajectory optical measurement. However, the systematic error correction is the key for high precision positional parameters. Aiming at this problem, the systematic error sources were analyzed when the target was above 80 km, the corresponding error model was set up, and the correction method was put forward according to the fixed star observation, based on the correction method of fixed star that the air refraction error and the axis errors of device were corrected together. To verify the effectiveness of the method, it was applied to the actual high trajectory optical measurement. The experimentation results show that the correction effect is obvious and the precision of correction can be improved to 2＇.