| Project/Area Number |
13554016
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Kyushu University |
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Principal Investigator |
YUMOTO Kiyohumi Kyushu University, Faculty of Sciences, Professor, 大学院・理学研究院, 教授 (20125686)
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| Co-Investigator(Kenkyū-buntansha) |
SHIOKAWA Kazuo Nagoya University, Solar Terrestrial Environment Laboratory, Associate Professor, 太陽地球環境研究所, 助教授 (80226092)
KAWANO Hideaki Kyushu University, Faculty of Sciences, Associate Professor, 大学院・理学研究院, 助教授 (60304721)
YOSHIKAWA Akimasa Kyushu University, Faculty of Sciences, Research Associate, 大学院・理学研究院, 助手 (70284479)
OZAWA Kazuo Cosmo Design Inc., President Researcher, 取締役社長(研究職)
SETO Masahiro Tohoku Institute Technology, Professor, 通信工学科, 教授 (60085412)
林 幹治 東京大学, 大学院・理学系研究科, 助教授 (60011730)
巻田 和男 拓殖大学, 工学部, 教授 (40129945)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥13,400,000 (Direct Cost: ¥13,400,000)
Fiscal Year 2003: ¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 2002: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥3,600,000 (Direct Cost: ¥3,600,000)
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| Keywords | 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テム / フラッシュメモリーカード |
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| Research Abstract |
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.
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