| 阿尔芬波动特征对卫星磁力仪零位标定的影响 |
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| 引用本文： | 潘宗浩,王国强,孟立飞,易忠,张铁龙.阿尔芬波动特征对卫星磁力仪零位标定的影响[J].地球物理学报,2019,62(4):1193-1198. |
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| 作者姓名： | 潘宗浩 王国强 孟立飞 易忠 张铁龙 |
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| 作者单位： | 1. 中国科学技术大学地球和空间科学学院, 合肥 230026;2. 哈尔滨工业大学(深圳), 广东深圳 518055;3. 北京卫星环境工程研究所, 北京 100029;4. 中国科学院比较行星学卓越创新中心, 合肥 230026;5. 奥地利科学院空间研究所, 格拉茨 A-8042 |
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| 基金项目： | 国家自然科学基金（41774171，41804157），深圳启动基金，深圳知识创新计划基础研究（JCYJ20170811154933612），高等学校学科创新引智计划（B18017）联合资助. |
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| 摘 要： | 磁通门磁力仪的零位偏移量在卫星轨道上会因诸多因素而发生改变.为此,基于剪切阿尔芬波动不改变总磁场强度这一特征的Davis-Smith方法被提出用于计算磁力仪的零位补偿.实际上,行星际空间中没有纯粹的阿尔芬波动.本文采用数值模拟分析了存在小的压缩波动情况下,阿尔芬波动的幅度、周期和相位以及数据窗口时间长度等对Davis-Smith方法计算零位补偿的影响.我们发现,只有当阿尔芬波动的周期与压缩波动周期相同时,阿尔芬波动的性质会对零位补偿的计算产生不可忽视的误差.阿尔芬波动的幅度越大,零位补偿的误差越小.磁场各分量零位补偿的误差大小还会受到阿尔芬波动初始相位的影响.此外,数据窗口时间长度越长,则零位补偿误差趋于减小至真实值.
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| 关 键 词： | 磁力仪校准 Davis-Smith方法 阿尔芬波动 补偿 误差特征 |
| 收稿时间： | 2018-10-14 |
Influence of Alfvénic characteristics on calibration of satellite magnetometer |
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| PAN ZongHao,WANG GuoQiang,MENG LiFei,YI Zhong,ZHANG TieLong.Influence of Alfvénic characteristics on calibration of satellite magnetometer[J].Chinese Journal of Geophysics,2019,62(4):1193-1198. |
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| Authors: | PAN ZongHao WANG GuoQiang MENG LiFei YI Zhong ZHANG TieLong |
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| Institution: | 1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;2. Harbin Institute of Technology(Shenzhen), Shenzhen Guangdong 518055, China;3. Beijing Institute of Spacecraft Environment Engineering, Beijing 100029, China;4. Center for Excellence in Comparative Planetology, Chinese Academy of Sciences, Hefei 230026, China;5. Space Research Institute, Austrian Academy of Sciences, A-8042 Graz, Austria |
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| Abstract: | The zero offset of the fluxgate magnetometer in satellite orbit will be changed due to several factors. For this reason, the Davis-Smith method is proposed to calculate the zero compensation of the magnetometer based on the feature that the shear Alfvén waves do not change the total magnetic field strength. In fact, there is no pure Alfvén waves in the interplanetary space. In this paper, numerical simulation is used to analyze the influence of the amplitude, period and phase of the Alfvén waves and the time length of the data window on the zero offset of the magnetometer calculated by the Davis-Smith method in the presence of weak compressional waves. We find that Alfvén waves can produce a non-negligible error in the calculation of zero compensation only when its period is the same as the period of the compressional wave. The greater the amplitude of Alfvén waves, the smaller the error of the zero offset. The error of the zero offset is also affected by the initial phase of the Alfvén wave. In addition, the error of the zero offset tends to decrease to its true value for the longer the data window length. |
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| Keywords: | Magnetometer calibration Davis-Smith method Alfvén wave Offset Error characteristics |
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