The electromagnetic wave experiment for CSES mission: Search coil magnetometer

查看全文 作　　者：CAO [1]JinBin;ZENG [1]Li;ZHAN [2]Feng;WANG [1]ZuoGui;WANG [1]Yan;CHEN [1]Yu;MENG [3]QingChun;JI [2]ZhanQiang;WANG [1]PengFei;LIU [2]ZhongWei;MA [2]LingYu

机构地区：[1]School of Space and Environment, Beihang University, Beijing 100191, China;[2]Shandong Institute of Space Electronic Technology, Yantai 264670, China;[3]School of Astronautics, Beihang University, Beijing 100191, China

出　　处：《Science China(Technological Sciences)》索引2018年第61卷第5期,共6页

基　　金：supported by the National Natural Science Foundation of China(Grant No.41431071) 摘　　要：The seismic activities on the Earth can produce a disturbance of the electromagnetic field and particles in the ionosphere. The search coil magnetometer(SCM) mounted on China Seismo-Electromagnetic satellite(CSES) is designed to measure the magnetic field fluctuation of low frequency electromagnetic waves in the frequency range of 10 Hz–20 k Hz. The SCM comprises a three-axis search coil sensor mounted on a 4.5 m boom and an electronic box inside satellite module. The sampling rate of the SCM is 51.2 k Hz and the time resolution of the power spectrum density(PSD) is 2 s. The frequency resolution is 12.5 Hz.There are three operation modes: survey, detailed survey and calibration. In the survey mode, the SCM can provide a PSD in the whole frequency range of 10 Hz–20 k Hz and wave forms in the low frequency range below 2 k Hz while in the detailed survey mode the SCM can provide both PSD and wave forms in the whole frequency range of 10 Hz–20 k Hz. The sensitivity of the SCM instrument is 5.0×10^(-4) n T Hz^(-1/2) at 10 Hz, 5.0×10^(–5) n T Hz^(-1/2) at 200 Hz, 3.4×10^(-5) n T Hz^(-1/2) at 2 k Hz and 1.1×10^(-4) n T Hz^(-1/2) at 20 k Hz. The telemetry rate is ~0.85 Mbps in the survey mode and ~3.0 Mbps in the detailed survey mode. The phase difference between three axes can be made generally with a precision of less than 1.0°. The dynamic range of the SCM instrument is over 100 d B. The orthogonality of three mechanical axes of search coil senor is better than 0.13°. The performance of SCM can satisfy the requirement of scientific objectives of CSES mission. 关键词：电磁波磁强计频率范围实验 SCM 磁场变化光谱密度操作模式

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The electromagnetic wave experiment for CSES mission: Search coil magnetometer

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