TM65m射电望远镜副面随动模型及性能评估

• 作 者: 王锦清 虞林峰 赵融冰 董健 左秀婷 苟伟 刘庆会 范庆元
• 机 构: 中国科学院上海天文台,
• 出 处: 中国科学:物理学 力学 天文学
• 发表日期: 2014年11期
• 关键词: 随动 射电望远镜 TM65m 副面 模型 位姿 天线效率 系统温度 俯仰角 主面

天马65 m射电望远镜副面系统的安装可以用来补偿副面支撑和主面的重力变形,在不同的俯仰角度上,副面位姿的调整可以提高天线的效率和指向性能,本文建立了副面位姿随俯仰角变化的模型,测试结果表明副面随动模型可以有效改善65 m望远镜在高低仰角上的效率,分别达到20%和15%,使得在整个俯仰角范围内,X波段的接收效率均到达60%以上;副面随动模型导致的指向偏差与grasp仿真结论符合良好.

The installation of the Pema 65m radio telescope secondary system can be used to compensate the gravity deformation of the secondary support and the primary surface. At different pitch angles, the attitude adjustment of the secondary surface can improve the efficiency and directivity of the antenna. In this paper, The results show that the secondary follow-up model can effectively improve the efficiency of the 65 m telescope at elevation elevation of 20% and 15%, respectively, so that in the whole pitch angle range, the X-band The receiving efficiency reached above 60%; the deviation caused by the secondary side follow-up model was in good agreement with the simulation conclusion.