中文摘要：

星体作为定标标准源具有位置、辐射出射度稳定等优势,为得到其长期数据,研究了一套地基观星系统,实现对星体的长时间连续跟踪扫描。首先通过星体轨道预算模型推算其各时刻所处位置,确定赤道仪跟踪轨迹,使跟踪目标长期处在跟踪平台内的光谱仪视场。通过光谱仪观测待测星体,将测得数据进行处理,得到观测结果。实验允许跟踪精度最大误差为0.01°,经外场实验验证仪器跟踪精度为0.004°,验证了系统的稳定性、精确性完全满足实验需求,设备能够以较高精度实现对星体的跟踪观测,论证了该方法的可行性。最后,对实验的误差源进行了分析。

英文摘要：

The star as calibrate source has advantages of stable position and stable radiation. To get the long period data,an earth-based observing star system was designed,and it can realize the long period tracking and scanning for star. The position of star is gotten by calculating the star＇s trajectory; the tracking trajectory of the equatorial is determined to promise that the target star is always in the view of the optical spectrometer. Observing the target star by the optical spectrometer,the result of observation can be gotten. The maximum error which the experiment requires is0. 01°,while the tracking accuracy of the system gotten in the outfield experiment is 0. 004°. This proves that the stability and the accuracy of the system can meet the requirement of the experiment,and the facility can track and observe star in high-accuracy. Finally,the error sources of the environment are analyzed.