天体测量技术及应用研究组知识库

II型多功能天文经纬仪是中国科学院云南天文台为了满足利用多台仪器组网监测测站本地铅垂线变化信息的需求所研制的一种地面天体测量仪器。在该仪器的图像采集系统中，使用了三台非制冷CCD作为采集终端，工作在外触发模式，利用望远镜控制系统提供的外触发信号按照观测时序触发相机采集。介绍了望远镜的具体工作模式，对图像采集系统的工作流程给予了说明；介绍了采集系统的硬件构成、软件框架和所涉及的主要编程方法。给出了图像采集系统的软件工作界面和所采集的图像，并对所拍摄恒星像成像质量进行了简单分析。 

The YNAO Multi-Function Astronomical Theodolite II is a ground-based astrometric telescope. Two telescopes have been built in the Yunnan Observatory. They are used to form the observation network with one first generation YNAO Multi-Function Astronomical Theodolite for monitoring the variation of plumb line of observing site. Its main imaging
devices are three digital CCD cameras without cooling, which work in external trigger mode. When the telescope is observing, three sets of triggering signals are generated from the telescope control system, for controlling three digital CCD cameras, respectively. In the paper, we show the detailed information of the telescope operation mode, and give an
introduction to workflow of the image acquisition system. We also give the details of hardware constitution, software framework and main programming methods of software. For demonstrating the effectiveness of the system, we provide a screenshot of the user interface of the software, some images acquired by the cameras, and an analysis of a stellar image recorded by the camera.