经纬仪的红外测量数据含有基准点误差,在数据处理中,该误差对目标定位精度的影响往往被忽视。文中提取了经纬仪摄影轴之间的几何关系,由几何示意图推导了误差修正公式,分析了基准点误差问题。仿真结果表明,基准点误差严重影响目标定位精度,在红外数据处理中必须予以修正。

There are datum marks errors in infrared measurement data of certain type theodolite and the influence of the errors on trajectory parameter accuracy are always neglected in data processing. The geometry relation of photography axes of theodolite was extracted in this paper, and the formulae of error correction were deduced by sketch, and the problems of the datum mark errors were analyzed. The simulation results indicate that the datum mark errors influence the trajectory parameter accuracy badly, thus they must be corrected in infrared data processing.