导航卫星信号对天马65 m射电望远镜的干扰分析  

Interference analysis of navigation satellite signals using the Tianma 65-m radio telescope

作　　者：孙正雄[1] 王锦清[1,2,3] 虞林峰 陈校非[4] 苟伟 王广利[1,5] SUN ZhengXiong;WANG JinQing;YU LinFeng;CHEN XiaoFei;GOU Wei;WANG GuangLi(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China;Shanghai Key Laboratory of Space Navigation and Position Techniques,Shanghai 200030,China;National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100094,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院射电天文重点实验室,南京210008 [3]上海市空间导航与定位技术重点实验室,上海200030 [4]中国科学院国家授时中心,西安710600 [5]中国科学院大学,北京100094

出　　处：《中国科学：物理学、力学、天文学》2022年第3期116-125,共10页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11903068,11873015);国家重点研发计划(编号:2018YFA0404702)资助项目。

摘　　要：本文主要论述了卫星无线电导航业务与射电天文业务的兼容性,以及根据天马65 m射电望远镜对导航卫星干扰信号的响应情况进行了仿真和实测分析.首先介绍了CN频段的卫星导航与射电天文业务的频率划分,接着估算了射电天文观测的灵敏度和干扰电平阈值.主要描述了天线方向图、干扰仿真计算方法和天马65 m射电望远镜的性能优势.另外,本文对干扰测量过程中采用的解算方法进行了详细的介绍,最后给出测量结果,并且详细分析了仿真和实测的差异.结果表明,天马65 m射电望远镜旁瓣接收导航卫星干扰信号时,天线增加的噪声温度低于系统噪声温度的1/10.This article mainly discusses the compatibility of satellite navigation and radio astronomy services as well as the simulation and measurement analysis based on the Tianma 65-m radio telescope’s response to the interference signals from a navigation satellite. First, the frequency division of satellite navigation and radio astronomy services are introduced in the CNfrequency band. Then, the sensitivity and interference thresholds of radio astronomy observation are estimated. This paper mainly describes the antenna pattern, interference simulation calculation method, and the performance advantages of the Tianma 65-m radio telescope. The solution methods are introduced in detail. Finally, the measurement results show that the noise temperature generated by the sidelobe response of the Tianma 65-m radio telescope to the interference signals from the navigation satellite is <1/10 of the antenna system noise temperature.Furthermore, the differences between the simulation and measurement are thoroughly examined.

关 键 词：干扰 灵敏度 射电望远镜 仿真 测量 

分 类 号：P111[天文地球—天文学]