Ground calibration of the Mars orbiter magnetometer onboard Tianwen-1

查看全文 作　　者：ManMing [1,2]Chen;Kai [1,2]Liu;XiaoWen [1]Hu;YiRen [1,2]Li;XinJun [1,2]Hao;ZongHao [1,2]Pan 机构地区：[1]School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;[2]Chinese Academy of Sciences Center for Excellence in Comparative Planetology,University of Science and Technology of China,Hefei 230026,China 出　　处：《Earth and Planetary Physics》索引2023年第7卷第3期,共7页 基　　金：This work was financially supported by the Chinese National Space Administration(CNSA),the Strategic Priority Program(Grant No.XDB41000000);the Key Research Program of Frontier Sciences(No.QYZDB-SSW-DQC015);the Strategic Priority Program(Grant No.XDB41030100)of the Chinese Academy of Sciences.Thanks are extended to the entire MOMAG team at the University of Science and Technology of China. 摘　　要：Ground calibration experiments of the Mars orbiter magnetometer(MOMAG)onboard the orbiter of Tianwen-1 were performed to determine the sensitivity,misalignment angle,and offset of the sensors.The linearity of the applied calibrated magnetic fields and the output from the sensors were confirmed to be better than 10^(-4),and the sensor axes were orthogonal to each other within 0.5 degrees.The temperature dependencies of the sensitivity and misalignment angle were examined,but no clear signatures of temperature dependencies could be seen.Sensor offset and the stability of sensor offset drift with a temperature change were also determined by the rotation method.The stability of the sensor offset drift was less than 0.01 nT/℃.The ground calibration of MOMAG determines all the calibration parameters of the sensors for accurate magnetic field measurements in orbit with the appropriate corrections. 关 键 词：Mars orbiter magnetometer Tianwen-1 ground calibration