基于空间矢量天线的太阳低频射电爆发探测研究  

Study of Very Low Frequency Solar Radio Emission Detection with Space Vector Antenna

作　　者：陈林杰[1] 颜毅华[1,2] 谭宝林 CHEN Linjie;YAN Yihua;TAN Baolin(CAS Key Laboratory of Solar Activity,National Astronomical Observatories of Chinese Academy of Sciences,Beijing 100101,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100047,China)

机构地区：[1]中国科学院国家天文台太阳活动重点实验室,北京100101 [2]中国科学院大学天文学与空间科学学院,北京100047

出　　处：《深空探测学报（中英文）》2021年第1期100-108,共9页Journal Of Deep Space Exploration

基　　金：嫦娥四号任务有效载荷科研工程研制项目:中荷–低频射电探测器(NCLE);国家自然科学基金资助项目(11573043,11433006,11790305,11941003);中科院战略性先导科技专项高频段高精度频谱测量与定标(XDA15020203)。

摘　　要：目前已有空间探测器对太阳的甚低频射电爆发进行的探测主要是频谱观测,针对太阳低频射电爆发的成像观测仍然是空白,利用空间矢量天线可以对太阳低频射电爆发(包括Ⅱ型和Ⅲ型暴)进行空间定位和一定的成像观测。研究针对空间(甚)低频射电探测器对太阳射电爆发的探测,提出了利用三极子矢量天线对太阳爆发进行定位的算法;基于部分空间甚低频设备的观测数据,在不同条件下对算法进行了仿真,同时针对"嫦娥四号"上的甚低频射电探测器(同样采用了三极子矢量天线),分析了其探测太阳低频射电爆发的能力。结果表明:当信号的信噪比达到10 dB以上时,矢量天线可以实现度量级的定位精度,并进一步分析了空间低频探测器探测太阳低频射电爆发的能力。Solar winds,Coronal Mass Ejections(CME),interplanetary shock waves and high-energy particle events,induced by the solar radio bursts,are called as solar electromagnetic storms. The propagation,acceleration,and evolution of the CMEs,solar winds,interplanetary shock waves and high-energy particle phenomena mainly happen at the frequency range from tens of kHz to tens of MHz,which is generally considered as the frequency band of Very Low Frequency(VLF). Though,there are already few space instruments that have investigated the VLF solar radio emissions,most of the observations are spectral measurements,and only occupied part of the whole VLF band,while the imaging observations of the VLF solar radio bursts are still blank. Based on the characteristics of the vector antenna,it can estimate the Direction Of Arrival(DOA)of the incoming waves,which can be used to locate and image the solar radio bursts(Type Ⅱ&Ⅲ). So all the latest space VLF radio instruments adopt the tripole antenna can do the observations. In this paper,in order to investigate the detection of the solar radio bursts with the space VLF radio explorer,different algorithms are proposed to detect the solar radio bursts with a tripole vector antenna,and simulations have been done with some space VLF radio observations for these algorithms under different conditions. The simulation results show that the vector antenna can locate the radio bursts with a degree-level accuracy. The capability of detecting the solar radio bursts is also analyzed in further for the space VLF radio explorer.

关 键 词：甚低频 空间探测器 太阳射电爆发 矢量天线 

分 类 号：P182[天文地球—天文学] P162.11