地平式望远镜AGU标校模型与仿真试验  

Calibration Models and Their Simulations for an AGU of an Altazimuth Telescope

作　　者：卢晓猛[1] 王建峰[1] 王汇娟[1] 米琳莹[1] 

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《天文研究与技术》2013年第2期142-146,共5页Astronomical Research & Technology

基　　金：国家自然科学基金(10978010)资助

摘　　要：地平式望远镜中自动导星单元(Automatic Guiding Unit,AGU)用于导引主视场观测恒星,其视场仅约1'。控制软件需要控制AGU在二维运动,确保选择的参考星能够进入AGU视场;并且当参考星离开原来位置时能够给出偏差值以修正望远镜指向,从而实现主视场对恒星的凝视观测。基于球面投影坐标系分别为AGU的中心指向和像场旋转建立齐次方程修正模型,使得AGU可以按照赤道坐标指向恒星,并且当恒星偏离时能够给出误差值。An Auto Guiding Unit （AGU） of an Altazimuth telescope is used to guide the primary field of view, but the field of view itself is only about 1 arc minute. The two-dimensional motion of an AGU needs to be controlled through certain software to ensure a selected star appearing in its field of view. The controlling software also needs to give the bias error when there is a drift of the pointing of the AGU so as to correct the telescope pointing and make tracking observation of the star. In this paper we use homogeneous equations based on the celestial projection coordinate system to build two models to correct the pointing and calculate the orientation accuracy of the AGU. Using these models an AGU can be used to point to a Star （ represented in the equatorial coordinates） and give the bias error of pointing.

关 键 词：偏置导星 天体力学 坐标系 望远镜 

分 类 号：P111.2[天文地球—天文学]