一种光电经纬仪单项差检测新方案

New testing approach for sighting error and non-perpendicularity between horizontal axis and vertical axis for a photoelectrical theodolite

提出了一种光电经纬仪单项差检测新方案,光电经纬仪以正镜瞄准不同俯仰角度目标测得的方位角与高精度经纬仪标定的方位角真值有一定差异,利用这种差异与光电经纬仪的照准差和不垂直度误差之间的内在联系,推导出光电经纬仪的照准差和不垂直度误差。新检测方案的单项差测量误差小于10″,对由于结构限制不能进行倒镜测量的机载光电测量系统单项差修正有实际意义。

There is a difference between different azimuths measured by a photoelectrical theodolite in normal position of telescope and azimuthes measured by a higher accurate theodolite in vary pitch angles, the indwelling affiliation is existed in the difference with the sighting error and non-perpendicularity between horizontal axis and vertical axis for a photoelectrical theodolite, then both errors of a photoelectrical theodolite is deduced. The error of the new test method is less than 10＂ , by way of developing the new testing method, it has practical meaning to correct above errors for an airborne photoelectrical measurement system which can＇ t aim in reversed position of telescope because of structural limit.