65m射电望远镜副反射器调整系统的标校

Accuracy evaluation on sub-reflector adjustment system of65-metre radio telescope in Shanghai

65m射电望远镜是目前亚洲口径最大、精度最高的天线,重约2740t,最高工作频率为43GHz。为保证天线在不同工作姿态下都能获得最佳的观测效率,该望远镜在国内首次采用了副反射器调整系统,用以实时调整不同仰角下主、副面之间的位置关系。文章阐述了副反射器调整系统标校的内容、数学模型、测量方法以及最终结果,并对标校精度进行了分析。通过对副反射器调整系统的标校,为65m射电望远镜高精度工作打下了坚实的基础。

65-metre radio telescope in Shanghai with the maxium frequency of 43 GHz is one of the largest and highest precision telescope, whose weight is 2740t. In order to observe under various work attitudes, is adopted to re-posit the location of reflector and sub-reflector lively. Adjustment system, model, measurement and results are instructed in this paper, and accura- cy evaluation is analyzed. High precision of 65-metre radio telescope in Shanghai can be real- ized after accuracy evaluation of adjustment system.