为了提高水平式光电望远镜静态指向精度, 对光电望远镜静态指向修正模型进行了理论分析和实验研究, 建立了水平式望远镜指向模型。首先, 介绍了球谐函数模型和水平式望远镜指向模型, 并对水平式望远镜指向模型加以修改。然后, 对全天区均匀分布的70颗Tycho-2恒星进行实际观测, 获得水平式光电望远镜在L轴和B轴上的指向偏差, 利用最小二乘法对该模型进行拟合, 计算出水平式望远镜指向模型中各待定系数。最后, 采用该指向模型对某型水平式望远镜进行了修正。实验结果表明: 采用水平式望远镜指向模型进行修正后, 望远镜设备总指向精度由修正前的15210″提高到了476″。满足系统总体提出的精度要求, 能够广泛地应用于科研和工程领域。

In order to improve the static pointing accuracy of level mounting optoelectronic telescope, the static pointing models are presented after theoretical analysis and experimental research, and modified model for level mounting optoelectronic telescope is established. First, spherical harmonic function model and modified model for level mounting optoelectronic telescope are introduced. Then 70 stars from Tycho-2 scattered uniformly in the sky were selected to be measured, and the discrete values of the 70 stars′ pointing errors were gained in longitude and latitude dimensions, respectively. Finally, the coefficients in the total pointing error model were obtained by least square fitting method. Experimental results indicate that pointing precision of level mounting optoelectronic telescope can be improved from 15210″ (without modified model) to 476″ (with modified model). The modified model for level mounting optoelectronic telescope can satisfy the requirements in general design, which can be widely applied in science and engineering field.