Development of Data Acquisition System for Space Weather Study

空间天气研究数据采集系统的开发

• 批准号: 13554016
• 负责人: YUMOTO Kiyohumi
• 金额: $ 8.58万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13554016/
• 关键词: Space weather; Polar disturbances; Equatorial Magnetometer Network; GPS; Space Environment Research; Circum-pan Pacific Magnetometer Network; Real time; Data acquisition system; 観測記録システムの開発; 全地球的規模の観測; 無停電電源; GPS衛星信号受信; フラッシュメモリカード; 半自動観測記録シス

In this research, we have developed a real-time MAGnetic Data Acquisition System of Circum-pan Pacific Magnetometer Network, i.e. MAGDAS/CPMN system in Kyushu University. On the basis of the results, new fluxgate-type magnetometers and their data acquisition system from overseas sites to Japan will be constructed in the SERC, Kyushu University until the end of 2004. Magnetic field digital data(H+δH, D+δD, Z+δZ, F+δF) are obtained with the sampling rate of 1/16 seconds, and then the averaged data are transferred from the overseas stations to the SERC, Japan in real time. The long-term inclinations(I) of the sensor axes are measured by two tilt-meters with 0.2 arc-sec resolution. The temperature (T) inside the sensor bloc is also measured. The GPS signals are received to adjust the standard time inside the data logger/transfer unit.These data are logging in the Compact Flash Memory Card of 1 GB. Every day, the data logger at an overseas site generates a file containing averaged 1-see magnetic data (H,D,Z,F) and a file containing the averaged 1-minmagnetic data and inclination and temperature data (I,T) of the magnetometer sensor. The file size of the 1-sec data is less than 1.5 MB/day. The file-size of the 1-min data is less than 50KB. If the communication line at the site does not allow a fast-enough connection, the data logger sends only the 1-min file to the SERC every day ; if the connection is fast enough, the data logger sends both the 1-min file and the 1-sec file to the SERC every day. In fact, the data transfer does not have to be on a daily basis : That is, the data-transfer interval can be set to any value between 10 minutes and 1 day, depending on the condition of the following communication lines. The MAGDAS data can be transferred from the overseas stations to the SERC, Japan, by using three possible ways; special line for INTERNET, telephone line and Satellite telephone lines.

在本研究中，我们开发了一个环太平洋磁强计网络的实时地磁数据采集系统，即九州大学的MAGDAS/CPMN系统。根据这些成果，到2004年底，将在九州大学SERC建造新的磁通门型磁力计及其从海外到日本的数据采集系统。以1/16秒的采样率获得磁场数字化数据（H+δH，D+δD，Z+δZ，F+δF），并将其平均后的数据从国外台站真实的传送到日本SERC。传感器轴的长期倾角（I）由两个倾斜仪测量，分辨率为0.2弧秒。还测量传感器块内部的温度（T）。接收GPS信号以调整数据记录器/传输单元内的标准时间。这些数据记录在1 GB的紧凑型闪存卡中。每天，位于海外站点的数据记录仪生成一个包含平均1秒磁测数据（H、D、Z、F）的文件，以及一个包含平均1分钟磁测数据以及磁力计传感器的倾角和温度数据（I、T）的文件。1秒数据的文件大小小于1.5 MB/天。1分钟数据的文件大小小于50 KB。如果现场的通信线路不允许足够快的连接，则数据记录器每天仅向SERC发送1分钟文件;如果连接足够快，则数据记录器每天向SERC发送1分钟文件和1秒文件。事实上，数据传输不必每天进行：也就是说，数据传输间隔可以设置为10分钟到1天之间的任何值，具体取决于以下通信线路的状况。磁数据采集系统的数据可通过三种可能的方式从海外台站传送到日本电监会：因特网专线、电话线和卫星电话线。

项目成果

Ohtani, S.-I., R.Yamaguchi, M.Nose, H.Kawano, M.Engebretson, K.Yumoto: "Quiet-time magnetotail dynamics and their implications for the substorm trigger"J. Geophys. Res.. 107, A2. SMP6-1-SMP6-10 (2002)

Ohtani, S.-I., R.Yamaguchi, M.Nose, H.Kawano, M.Engebretson, K.Yumoto：“安静时间磁尾动力学及其对亚暴触发的影响”J.

Cli, P.J., C.T.Russell, J.Raeder, E.Zesta, K.Yumoto, H.Kawano, K.Kitamura, S.M.Petrinec, V.Angelopoulos.G.Le, M.B.Moldwin: "Propagation of the preliminary reverse impulse of sudden commencements to low latitudes"J.Geophys.Res.. 106,A9. 18,857-18,864 (2001

Cli, P.J., C.T.Russell, J.Raeder, E.Zesta, K.Yumoto, H.Kawano, K.Kitamura, S.M.Petrinec, V.Angelopoulos.G.Le, M.B.Moldwin：“突然的初步反向脉冲的传播

Makarov, G.A., D.G.Baishev, S.I.Solovyev, V.A.Pilipenko, M.Engebretson, K.Yumoto: "Meridional propagation velocity of the geomagnetic sudden impulse in the high-latitude region"J.Geomag.Aeronomy. 41,No.5. 578-582 (2001)

Makarov, G.A.、D.G.Baishev、S.I.Solovyev、V.A.Pilipenko、M.Engebretson、K.Yumoto：“高纬度地区地磁突发脉冲的经向传播速度”J.Geomag.Aeronomy。

Yoshikawa, A., M.Itonaga, M.Shinohara, Y.Obana, K.Yumoto: "The Hall induced shielding effect on the geomagnetic pulsations"Geophys.Res.Lettr.. (in press). (2002)

Yoshikawa, A.、M.Itonaga、M.Shinohara、Y.Obana、K.Yumoto：“霍尔对地磁脉动的感应屏蔽效应”Geophys.Res.Lettr..（出版中）。

Yumoto K., M.Shinohara, K.Nozaki, E.A.Orosco, Fr.V.Badillo, D.Bringas, CPMN, WestPac: "Observation Groups, Simultaneous Ground-based Observations of Electric and Magnetic Field Variations near the Magnetic Equator for Space Weather Study(COSPAR Colloquia

Yumoto K.、M.Shinohara、K.Nozaki、E.A.Orosco、Fr.V.Badillo、D.Bringas、CPMN、WestPac：“空间磁赤道附近电场和磁场变化的同步地面观测