射电天文台址区域化干扰电平阈值量化及其应用  

Quantization of regional interference level threshold for radioobservatory sites and its application

作　　者：蔡明辉[1,2] 刘奇 董晓玉[1,2] 马凌 王娜 苏晓明 CAI MingHui;LIU Qi;DONG XiaoYu;MA Ling;WANG Na;SU XiaoMing(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China)

机构地区：[1]中国科学院新疆天文台,乌鲁木齐830011 [2]新疆微波技术重点实验室,乌鲁木齐830011

出　　处：《中国科学：物理学、力学、天文学》2024年第1期150-158,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点研发计划(编号:2021YFC2203503);新疆维吾尔自治区自然科学基金(编号:2021D01E07);中国科学院科研仪器设备研制项目(编号:PTYQ2022YZZD01)资助。

摘　　要：为高效分析与评估台址周边辐射源对天文观测的影响,本文提出一种台址区域化干扰电平阈值量化方法.建立台址地形模型并进行网格划分,采用高效网格检索算法实现台址区域任意位置(网格)至望远镜的相对地形数据提取.在此基础上,选取适应于台址地形特征的电波传播算法,计算台址区域任意位置至望远镜的电波传播损耗,依据望远镜馈源口面干扰电平限值及旁瓣增益,实现台址区域干扰电平阈值量化,并应用于QTT台址,为射电望远镜电磁兼容性设计、台址无线电管理、干扰缓解策略提供重要技术支撑.To efficiently analyze and evaluate the effect of radiation sources around the station site on astronomical observations, amethod to quantify the interference level threshold of station site regionalization is proposed. A terrain model of thestation site is established and meshed, and an efficient grid retrieval algorithm is used to extract relative terrain data fromany position (grid) within the station site area. Based on this, a radio propagation algorithm adapted to the topographiccharacteristics of the station site is selected to calculate the radio propagation loss from any location of the station site tothe telescope. Considering the interference level limit and side lobe gain of the telescope feed interface, a thresholdquantization of the interference level in the station site area is implemented. This approach is then applied to the QTT(QiTai Radio Telescope) station site, providing important technical support for electromagnetic compatibilitymeasurement of the radio telescope, radio management of the station site, and interference mitigation strategy.

关 键 词：射电天文 区域网格 干扰电平阈值 

分 类 号：P112[天文地球—天文学]