2010 Fiscal Year Final Research Report
Research for Seismic Electromagnetic Phenomena in VHF and MF Bands
| Project/Area Number |
20560362
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Hiroshima City University |
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Principal Investigator |
YOSHIDA Teruaki Hiroshima City University, 情報科学研究科, 教授 (50316139)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHI Masahiro 広島市立大学, 情報科学研究科, 准教授 (30316137)
SHIN Koichi 広島市立大学, 情報科学研究科, 助教 (10509053)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 通信方式(無線,有線,衛星,光,移動) / 電波伝搬 / VHF帯 / MF帯 |
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| Research Abstract |
Received levels of non-line-of-sight in VHF and MF bands have been continuously observed in day and night. Observation results as follows: The received levels in MF band fluctuated with good correlation at sunrise and sunset. The received levels in VHF band frequently increased about 20 dB in midnight. It was confirmed that the phenomenon was due to fluctuation of aerological atmospheric refractivity. Tohoku-Pacific Ocean Earthquake occurred on 11th March 2011. It was confirmed that the electromagnetic phenomenon associated with the earthquake was feebler than that with aerological atmospheric refractivity.
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