为了对跟踪高轨目标无跟踪盲区的水平式经纬仪的指向进行修正，对经纬仪指向修正模型进行了理论分析和实验研究。介绍了球谐函数、支架、水平式3种指向修正模型，并对水平式模型做了修改。利用实测恒星数据进行matlab回归对比分析，最后采用内符合和外符合两种方法对3种模型的回归精度进行符合对比，得出了适合水平式经纬仪指向修正的模型。应用该水平式修正模型对某型水平式经纬仪的实际指向进行了修正，实验结果表明，其经轴L修正精度为0.467 2″，纬轴B修正精度为0.422 7″。对3种模型回归精度的对比分析显示，用支架和水平式模型修正水平式光电经纬仪指向精度时，效果均远优于球谐函数模型，支架模型略优于水平式模型，从而得出球谐函数模型不适合修正水平式经纬仪指向的结论。

In order to correct the static pointing of the level theodolite which is used to track high orbit targets without blind areas,this paper analyses and researches usual pointing correction models.Three kinds of pointing correction models,spherical harmonic function,Strom lo and horizontal models,are introduced and the last one is modified.Then, MATLAB regression analysis is used to analyze these static pointing models with measured star data and the inner conformity and the outer conformity methods are used to contrast the precisions of three kind static pointing models.Finally,a modified pointing model suitable for an actual level mounting theodolite is obtained.The modified pointing model is used to correct an actual pointing of the level mounting theodolite.Experimental results indicate that the correction precision of the L-axis is 0.445 3″,and that of the B-axis is 0.395 4″.Furthermore,the contrast analysis demonstrates that the pointing accuracies corrected by Strom lo and level models are much better than that by the spherical function mode and the pointing accuracy from the Strom lo mode is a little better than that of the level model.Obtained results show that the spherical function mode is not suitable to correct the static pointing of the level mounting theodolite.