磁场压缩波动幅度对卫星磁强计零位标定影响的数值仿真
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摘要
文章通过数值仿真分析了在不同压缩波动相对幅度条件下用Davis-Smith方法计算磁强计零位补偿的误差特征。结果表明,随着压缩波动相对幅度的减小,零位补偿的误差有减小的趋势;如果磁场某一分量中存在和压缩波动频率相同的波动,且幅度与压缩波动幅度相当,则该分量的零位补偿误差相对较大。因此,建议磁场波动与压缩波动的平均波动幅度之比的参考值在5～10之间,且参考值取得越大,零位补偿误差越小。
In this paper, the error characteristics of the zero compensation for the magnetometer are numerically analyzed by the Davis-Smith method under different relative amplitudes of compressional fluctuations. Our results show that as the relative amplitude of the compressional fluctuation decreases, the error of the zero compensation value for the magnetometer would decrease. When there is a wave in a certain component of the magnetic field with the same frequency as the compressional fluctuation, and the amplitude comparable to that of the compressional fluctuation, the zero compensation error of this magnetic field component will be relatively large. So we suggest that the reference value of the ratio of the average fluctuation amplitude of the magnetic field fluctuation to that of the compressional fluctuation ranges between 5 and 10;wherein the larger the reference value, the smaller the zero compensation error will be.
In this paper, the error characteristics of the zero compensation for the magnetometer are numerically analyzed by the Davis-Smith method under different relative amplitudes of compressional fluctuations. Our results show that as the relative amplitude of the compressional fluctuation decreases, the error of the zero compensation value for the magnetometer would decrease. When there is a wave in a certain component of the magnetic field with the same frequency as the compressional fluctuation, and the amplitude comparable to that of the compressional fluctuation, the zero compensation error of this magnetic field component will be relatively large. So we suggest that the reference value of the ratio of the average fluctuation amplitude of the magnetic field fluctuation to that of the compressional fluctuation ranges between 5 and 10;wherein the larger the reference value, the smaller the zero compensation error will be.
引文
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[2]ZHANG T L,LU Q M,BAUMJOHANN W,et al.Magnetic reconnection in the near venusian magnetotail[J].Science,2012,336(6081):567-570
[3]WANG G Q,VOLWERK M,NAKAMURA R,et al.Flapping current sheet with superposed waves seen in space and on the ground[J].J Geophys Res Space Physics,2014,119:10078-10091
[4]WANG G Q,ZHANG T L,VOLWERK M,et al.Mirror mode structures ahead of dipolarization front near the neutral sheet observed by Cluster[J].Geophys Res Lett,2016,43:8853-8858
[5]WANG G Q,VOLWERK M,ZHANG T L,et al.Highlatitude Pi2 pulsations associated with kink-like neutral sheet oscillations[J].J Geophys Res Space Physics,2017,122:2889-2899
[6]XIAO S,ZHANG T,GE Y,et al.Statistical study on the shape and position of the magnetotail neutral sheet[J].Ann Geophys,2016,34:303-311
[7]ACU?A M H.Space based magnetometers[J].Rev Sci Instrum,2002,73:3717-3736
[8]CARR C,BROWN P,ZHANG T L,et al.The double star magnetic field investigation:instrument design,performance and highlights of the first year’s observations[J].Ann Geophys,2005,23:2713-2732
[9]POPE S A,ZHANG T L,BALIKHIN M A,et al.Exploring planetary magnetic environments using magnetically unclean spacecraft:a systems approach to VEX MAG data analysis[J].Ann Geophys,2011,29:639-647
[10]BALOGH A.Planetary magnetic field measurements:missions and instrumentation[J].Space Sci Rev,2010,152:23-97
[11]PUDNEY M A,CARRL C M,SCHWARTZL S J,et al.Automatic parameterization for magnetometer zero offset determination[J].Geosci Instrum Method Data Syst,2012(1):103-109
[12]NESS N F,BEHANNON K W,LEPPING R P,et al.Use of two magnetometers for magnetic field measurements on a spacecraft[J].J Geophys Res,1971,76:3564
[13]WANG G Q,ZHANG T L,GE Y S.Spatial distribution of magnetic fluctuation power with period 40 to 600 s in the magnetosphere observed by THEMIS[J].J Geophys Res Space Physics,2015,120:9281-9293
[14]WANG G Q,ZHANG T L,VOLWERK M.Statistical study on ultralow-frequency waves in the magnetotail lobe observed by Cluster[J].J Geophys Res Space Physics,2016,121:5319-5332
[15]WANG G Q,GE Y S,ZHANG T L,et al.A statistical analysis of Pi2-band waves in the plasma sheet and their relation to magnetospheric drivers[J].J Geophys Res Space Physics,2015,120:6167-6175
[16]BELCHER J W.A variation of the Davis-Smith method for in-flight determination of spacecraft magnetic fields[J].J Geophys Res,1973,78(28):6480-6490
[17]HEDGECOCK P C.A correlation technique for magnetometer zero level determination[J].Space Sci Instrum,1975,1:83-90
[18]DAVIS L,SMITH E J.The in-flight determination of spacecraft magnetic field zeros[J].EOS Trans AGU,1968,49:257
[19]LEINWEBER H K,RUSSELL C T,TORKAR K,et al.An advanced approach to finding magnetometer zero levels in the interplanetary magnetic field[J].Meas Sci Technol,2008,19(5).doi:10.1088/0957-0233/19/5/055104
[20]孟立飞,潘宗浩,易忠,等.基于Davis-Smith方法计算卫星磁强计零位补偿的误差特征研究[J].地球物理学报,2018,61(9):3545-3551MENG L F,PAN Z H,YI Z,et al.Error properties of the fluxgate magnetometer offset based on Davis-Smith method[J].Chinese J Geophys,2018,61(9):3545-3551
[21]潘宗浩,王国强,孟立飞,等.阿尔芬波动特征对卫星磁强计零位标定的影响[J].地球物理学报,2019,62(4):1193-1198PAN Z H,WANG G Q,MENG L F,et al.Influence of Alfvénic characteristics on calibration of satellite magnetometer[J].Chinese J Geophys,2019,62(4):1193-1198