水平式光电望远镜静态指向误差的修正

李振伟; 杨文波; 张楠

doi:10.3788/CO.20150802.0263

水平式光电望远镜静态指向误差的修正

doi: 10.3788/CO.20150802.0263

中国科学院国家天文台长春人造卫星观测站，吉林长春 130117

基金项目: 中国科学院国家天文台长春人造卫星观测站青年探索基金资助项目(No.1400TS1001);中国科学院院级科研装备研制资助项目(No.YZ201116)

详细信息

通讯作者:
李振伟(1983—)，男，河南安阳人，助理研究员，2005年于东北大学获得学士学位，2008年于中国科学院研究生院获得硕士学位，2014年于中国科学院长春光学精密机械与物理研究所获得博士学位，主要从事空间目标光电观测技术方面的研究。E-mail:lizw@cho.ac.cn

中图分类号: P123.46;V556.5
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出版历程
- 收稿日期: 2014-10-11
- 录用日期: 2014-12-13
- 刊出日期: 2015-04-25

Static pointing error of level mounting optoelectronic telescope

Changchun Observatory,NAO,CAS,Changchun 130033,China

摘要

摘要: 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。
- 光电望远镜 /
- 空间碎片 /
- 静态指向误差
Abstract: 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.
- optoelectronic telescope /
- space objects /
- static pointing error

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图 1 水平坐标系

Figure 1. ALT-ALT coordinate system

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图 2 模型修正前L轴的残差分布图

Figure 2. Distributing of residue in L axis without modified model

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图 3 模型修正前B轴的残差分布图

Figure 3. Distributing of residue in B axis without modified model

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图 4 球谐函数模型修正后L轴的残差分布图

Figure 4. Distributing of residue in L axis with spherical harmonic function model

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图 5 球谐函数模型修正后B轴的残差分布图

Figure 5. Distributing of residue in B axis with spherical harmonic function model

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图 6 水平式望远镜指向模型修正后L轴的残差分布

Figure 6. Distributing of residue in L axis with modified model for level mounting optoelectronic telescope

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图 7 水平式望远镜指向模型修正后B轴的残差分布

Figure 7. Distributing of residue in B axis with modified model for level mounting optoelectronic telescope

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表 1 模型参数具体物理意义

Table 1. Physical meanings of coefficients in the model

参数具体物理意义

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表 2 光电望远镜系统具体参数

Table 2. Parameters of the telescope system

参数数值

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表 3 70颗恒星资料所确定的球谐函数模型系数

Table 3. Coefficients in spherical harmonic function model from data of 70 starts

L axis coefficients Result(″) B axis coefficients Result(″)

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表 4 70颗恒星资料所确定的水平式望远镜指向模型系数

Table 4. Coefficients in modified model for level mounting optoelectronic telescope from data of 70 starts

L axis coefficients Result(″) B axis coefficients Result(″)

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参考文献(11)

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