基于CCD提高射电望远镜极轴校准精度及修正  

Precise Adjustment of the Polar Axis of a Radio Telescope Antenna with a CCD Camera

作　　者：张岩[1,2,3] 颜毅华[2,3] 谭程明[2,3] 王威[2,3] 黄亚芳[1,2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院国家天文台,北京100012 [3]中国科学院太阳活动重点实验室(国家天文台),北京100012

出　　处：《天文研究与技术》2011年第1期15-20,共6页Astronomical Research & Technology

基　　金：新一代厘米-分米波射电日像仪(ZDYZ2009-3)资助

摘　　要：射电望远镜极轴的安装定位是否准确直接影响其指向精度和成像质量,通过运用光学CCD原理精确测量射电望远镜极轴偏差角度,用以安装校准极轴,达到提高射电望远镜指向精度和成像质量的效果,并且结合计算机可实现多极轴同时校准,提高工作效率。同时,基于CCD技术可以及时发现天线极轴出现的偏差并进行修正,提高了数据的质量。This paper discusses a method to precisely adjust the polar axis of a radio telescope antenna with a CCD camera. The accuracy of the polar axis is crucial to imaging of a radio telescope, because pointing accuracy and image quality are related to the accuracy. The deviation angle of the polar axis can be precisely measured by a CCD. The measurement method can improve pointing accuracy and image quality. If a computer system is further used, the method can adjust multiple radio antennas at the same time, which increases the efficiency. The detection and correction of the deviation of the polar axis are timely with this method which ensures the improvement of data quality.

关 键 词：日像仪 极轴 CCD 赤纬 分辨率 

分 类 号：TP202.2[自动化与计算机技术—检测技术与自动化装置]