Cross-calibration on the electromagnetic field detection payloads of the China Seismo-Electromagnetic Satellite  

作　　者：ZHIMA Zeren ZHOU Bin ZHAO ShuFan WANG Qiao HUANG JianPing ZENG Li LEI JunGang CHEN Yu LI Cheng YANG DeHe SUN XiaoYing MIAO YuanQing ZHU XingHong SHEN XuHui 

机构地区：[1]National Institute of Natural Hazards,Ministry of Emergency Management,Beijing 100081 China [2]National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China [3]School of Space and Environment,Beihang University,Beijing 100191,China [4]Lanzhou Institute of Physics,China Aerospace Science and Technology,Gansu 730000,China [5]Aerospace Dongfanghong Satellite Co.,Ltd.,Beijing 572699,China

出　　处：《Science China(Technological Sciences)》2022年第6期1415-1426,共12页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41874174 and 41574139);the National Key R&D Program of China(Grant No.2018YFC1503501);the APSCO Earthquake Research Project PhaseⅡand ISSI-BJ project;Southern Yunnan Observatory for Cross-block Dynamic Process,Yuxi Yunnan,China。

摘　　要：The China Seismo-Electromagnetic Satellite(CSES)deploys three payloads to detect the electromagnetic environment in the ionosphere.The tri-axial fluxgate magnetometers(FGM),as part of the high precision magnetometer(HPM),measures the Earth magnetic vector field in a frequency range from direct current(DC)to 15 Hz.The tri-axial search coil magnetometer(SCM)detects the alternating current(AC)related magnetic field in a frequency range from several Hz to 20 k Hz,and the electric field detector(EFD)measures the spatial electric field in a broad frequency band from DC to 3.5 MHz.This work mainly crosscalibrates the consistency of these three payloads in their overlapped detection frequency range and firstly evaluates CSES’s timing system and the sampling time differences between EFD and SCM.A sampling time synchronization method for EFD and SCM waveform data is put forward.The consistency between FGM and SCM in the ultra-low-frequency(ULF)range is validated by using the magnetic torque(MT)signal as a reference.A natural quasiperiodic electromagnetic wave event verifies SCM and EFD’s consistency in extremely low-frequency and very low-frequency(ELF/VLF)bands.This cross-calibration work is helpful to upgrade the data quality of CSES and brings valuable insights to similar electromagnetic detection solutions by low earth orbit satellites.

关 键 词：CSES CROSS-CALIBRATION HPM EFD SCM sampling time synchronization detection consistency ULF/ELF/VLF 

分 类 号：P318.6[天文地球—固体地球物理学]