大型射电望远镜电磁环境频谱监测

Site spectrum monitoring of electromagnetic environment for large radio telescopes

射电天文的发展需要更宽的观测频率,但是随着通讯的不断发展,射频无线电干扰(Radio Frequency Interference,RFI)对射电观测的影响日益加重,射电望远镜需要选择电磁环境优良的站址并进行保护.文中描述了目前国内在建和预研阶段的望远镜的电磁环境的测试过程,阐述了数据分析和处理方法.通过对我国射电望远镜台址选择和保护进行的电磁环境测试,优选出适合建立大型射电望远镜的台址.

The development of radio astronomic observations requires increasingly wide frequency band.However,with the continuous development of radio communication system,the radio frequency interference(RFI)has also become a curial factor which requires the sites for radio telescopes to be checked carefully for the RFI.In this paper,a method of data analysis and processing for the electromagnetic environments test is built,with which the results are presented for those telescopes that are under construction and those are in the preparatory phase.Lots of campaigns have been carried out to find excellent electromagnetic environment for the telescope site,it concludes that those sites with good electromagnetic environment conditions should be well protected.