| Project/Area Number |
23K19066
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0204:Astronomy, earth and planetary science, and related fields
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| Research Institution | Nagoya University |
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Principal Investigator |
傅 維正 名古屋大学, 宇宙地球環境研究所, 研究員 (70983766)
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| Project Period (FY) |
2023-08-31 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2024: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | Ionospheric disturbance / GNSS TEC / Double-thin-shell model / post-sunset MSTIDs |
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| Outline of Research at the Start |
Medium-scale traveling ionospheric disturbances (MSTIDs) are prevalent irregularities that affect radio signals traversing the ionosphere. This research delves into the underlying mechanisms of these disturbances, aiming to enhance applications like GNSS and astronomical observations.
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| Outline of Annual Research Achievements |
Medium-scale traveling ionospheric disturbances (MSTIDs) are commonly observed ionospheric irregularities at mid-latitudes, impacting radio signals as they traverse the ionosphere. Based on the ultra-dense GNSS observations over Japan, this research focuses on investigating the generation and development mechanisms of post-sunset MSTIDs.
In fiscal year 2023, the double-thin-shell model used for studying ionospheric disturbances at different altitudes has been enhanced, increasing its spatiotemporal resolution by more than twice its previous capacity. In such a case, this enhancement enables the capability to analyze post-sunset MSTIDs even under complex background conditions.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The objective of this project is to study the mechanisms of generation and development of ionospheric disturbances on the basis of observations. Improving the spatiotemporal resolution and confidence of modeling has been a major focus of the research, and significant progress has been made in this regard.
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| Strategy for Future Research Activity |
A comprehensive analysis of the factors contributing to ionospheric disturbances necessitates measurements of electric and magnetic fields, neutral winds, and other relevant factors from various instruments, in addition to the distribution of ionospheric electron density perturbations. Clearly, the inclusion of measurements beyond GNSS is imperative to accomplish this task. In this fiscal year, the enhanced model will be coupled with multi-source data (e.g., from ionosondes, radars, satellites) to comprehensively investigate and quantify the neutral and electrodynamic effects in the atmosphere and ionosphere pertaining to MSTIDs at different conditions.
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