Development of magnetometer system for measuring variations of global geomagnetic fields Associate

设计和开发了用于部署全球网络的磁强计系统，以研究具有高时间和幅度分辨率的磁层扰动的全球性质。设计了三种类型的系统，分别用于极光带周围的高纬度地区、包括日本岛屿在内的沿着赤道地区和磁倾赤道地区，它们分别被称为A、C和E摩尔。它们的记录系统不同。用数字盒式磁带记录器记录一个月内130 MB（A型）或三周内42 MB（C型）的三个分量磁场数据。E型采用先改装录音机，后改装EEP-ROM记忆卡，以满足长时间免维护的要求。三种型号的灵敏度（和采样率）分别为125 pT（1 Hz）、50 pT（1 Hz）和15 pT（1/3 Hz）。每个模型都在各自的现场运行，这些现场是隔离的、电源不稳定的、非常冷或非常热的。在某些地方，即使是对传感器或电缆的破坏也应该考虑在内。每一种模型都被改进到一个可以接受的水平，作为一个完整的数据采集系统，记录磁带被编译成计算机文件。数据的低采样文件（1分钟）通过互联网发布，供空间科学界查阅。

Magnetometer systems for deploying global networks were designed and developed to study global nature of the magnetospheric disturbances with high time and amplitude resolutions. Three types of systems with a ring core fluxgate magnetometer and a digital data logger were designed for the regions in the high latitudes around the auroral zone, along the meridional area involving Japan islands, and in the magnetic dip equator zone, which are called as moles of A, C and E, respectively. They are different in their recording systems. A type of digital cassette tape recorder was used to record three components of magnetic field data during one month in 130 MB(model A) or three weeks in 42 MB (model C). Model E adopted modified a audio-cassette tape recorder first and EEP-ROM memory card later for the requirement of smile and maintenance free for long time. The respective sensitivity(and sampling rate) of the three models is 125 pT (1 Hz), 50 pT (1Hz) and 15 pT (1/3 Hz). Each model was operated in the respective filed sites where are isolated, unstable in the power supply, very cold or very hot. Even vandalism on the sensor or cable staying outside should be taken into account in some places. Each model have been improved to an acceptable level as a total system of data acquisition that recoded tapes are compiles into computer files. The low sampling files (1 minute) of the data are released and accessible through Inter Net network for the space science community.