The BepiColombo-Mio Magnetometer en Route to Mercury
The BepiColombo-Mio Magnetometer en Route to Mercury
复制标题
BepiColombo-Mio 磁力计正在前往水星的途中
DOI：
10.1007/s11214-020-00754-y
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发表时间：
2020
影响因子：
10.3
通讯作者：
Baumjohann W
中科院分区：
文献类型：
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作者：
Baumjohann W
介绍了BepiColombo使命的Mio航天器上的磁通门磁力计MGF及其科学目标、仪器设计、校准报告和科学期望。MGF仪器由两个三轴磁通门磁力计组成。这两个传感器都安装在一个4.8米长的桅杆上，测量水星周围的磁场，从近表面（初始近中心高度为590公里）到6个行星半径（11640公里）。MGF的两个传感器以完全冗余的方式运行，每个传感器都有自己的电子设备，数据处理和电源单元。MGF仪器以高达128 Hz的速率对磁场进行采样，以揭示快速演变的磁层动力学，其中包括磁重联引起的亚暴样扰动、场向电流和超低频波。MGF的高时间分辨率也有助于研究日光层内部的太阳风过程（通过测量行星际磁场）。MGF仪器通过进行多点观测来确定更高多极级的行星内部场，并将时间波动与空间变化分开，从而有力地证实了其同伴MPO磁力计的测量结果。
The fluxgate magnetometer MGF on board the Mio spacecraft of the BepiColombo mission is introduced with its science targets, instrument design, calibration report, and scientific expectations. The MGF instrument consists of two tri-axial fluxgate magnetometers. Both sensors are mounted on a 4.8-m long mast to measure the magnetic field around Mercury at distances from near surface (initial peri-center altitude is 590 km) to 6 planetary radii (11640 km). The two sensors of MGF are operated in a fully redundant way, each with its own electronics, data processing and power supply units. The MGF instrument samples the magnetic field at a rate of up to 128 Hz to reveal rapidly-evolving magnetospheric dynamics, among them magnetic reconnection causing substorm-like disturbances, field-aligned currents, and ultra-low-frequency waves. The high time resolution of MGF is also helpful to study solar wind processes (through measurements of the interplanetary magnetic field) in the inner heliosphere. The MGF instrument firmly corroborates measurements of its companion, the MPO magnetometer, by performing multi-point observations to determine the planetary internal field at higher multi-pole orders and to separate temporal fluctuations from spatial variations.