| 研究課題/領域番号 |
23K19066
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| 研究種目 |
研究活動スタート支援
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| 配分区分 | 基金 |
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| 審査区分 |
0204:天文学、地球惑星科学およびその関連分野
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| 研究機関 | 名古屋大学 |
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研究代表者 |
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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| 研究期間 (年度) |
2023-08-31 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
1,950千円 (直接経費: 1,500千円、間接経費: 450千円)
2024年度: 780千円 (直接経費: 600千円、間接経費: 180千円)
2023年度: 1,170千円 (直接経費: 900千円、間接経費: 270千円)
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| キーワード | Ionospheric disturbance / GNSS TEC / Double-thin-shell model / post-sunset MSTIDs |
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| 研究開始時の研究の概要 |
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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| 研究実績の概要 |
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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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
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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| 今後の研究の推進方策 |
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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