| Project/Area Number |
22403011
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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 | 海外学術 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Akinori 京都大学, 理学研究科, 准教授 (10311739)
OOTSUKA Yuichi 名古屋大学, 太陽地球環境研究所, 准教授 (40314025)
HASHIGUCHI Hiroyuki 京都大学, 生存圏研究所, 准教授 (90293943)
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| Co-Investigator(Renkei-kenkyūsha) |
SHIOKAWA Kazuo 名古屋大学, 太陽地球環境研究所, 教授 (80226092)
ISHII Mamoru 独)情報通信研究機構, 電磁波計測研究センター, 推進室長 (20359003)
MARUYAMA Takashi (独)情報通信研究機構, 上席研究員 (80359017)
SAITO Susumu (独)電子航法研究所, 航法システム領域, 主幹研究員 (40392716)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2010: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
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| Keywords | 赤道スプレッド F 現象 / 衛星ビーコン観測 / アジア太平洋 / 国際共同研究 / 赤道スプレッドF現象 / 広域観測網 / ディジタル受信機 |
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| Research Abstract |
Equatorial Spread-F (ESF) is a one of the most intense ionospheric disturbance that causes severe scintillation to the satellite-ground communications, and degradation of the GPS locations. In this study we deployed large -area observation network of the ionosphere from Asia and Pacific regions by means of radars, nightglow imagers, and satellite-ground beacon receivers. We investigated yet-unknown day-to-day variability of ESF , and found that the ESF is generated from the enhanced Large -Scale Wave Structure (LSWS) of the ionosphere. We also found detailed behavior of ESF at post -midnight period that enhances under the low-solar conditions.
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