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アイテム
無線信号、周波数操作、衛星間通信ネットワークに基づく大気中の水蒸気量の導出に関する研究
https://doi.org/10.18997/0002000366
https://doi.org/10.18997/00020003663a312992-7ef3-4a6f-9408-d94a3e1dc563
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
kou_k_583.pdf (7.7 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-02-14 | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
| 資源タイプ | doctoral thesis | |||||||
| タイトル | ||||||||
| タイトル | Derivation of Atmospheric Water Vapor Based on Radio Signals, Frequency Manipulation and Intersatellite Communication Network. | |||||||
| 言語 | en | |||||||
| タイトル | ||||||||
| タイトル | 無線信号、周波数操作、衛星間通信ネットワークに基づく大気中の水蒸気量の導出に関する研究 | |||||||
| 言語 | ja | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 著者 |
Nyamukondiwa, Ramson Munyaradzi
× Nyamukondiwa, Ramson Munyaradzi
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | The atmospheric total water vapor content (TWVC) affects climate change, weather patterns, and radio signal propagation. Recent techniques such as global navigation satellite systems (GNSS) are used to measure TWVC but with either compromised accuracy, temporal resolution, or spatial coverage. This study demonstrates the feasibility of predicting, mapping, and measuring TWVC using spread spectrum (SS) radio signals and software-defined radio (SDR) technology on low Earth-orbiting (LEO) satellites. An intersatellite link (ISL) communication network from a constellation of small satellites is proposed to achieve three-dimensional (3D) mapping of TWVC. However, the calculation of TWVC from satellites in LEO contains contribution from the ionospheric total electron content (TEC). The TWVC and TEC contribution are determined based on the signal propagation time delay and the satellites’ positions in orbit. Since TEC is frequency dependent unlike TWVC, frequency reconfiguration algorithms have been implemented to distinguish TWVC. The novel aspects of this research are the implementation of time stamps to deduce time delay, the unique derivation of TWVC from a constellation setup, the use of algorithms to remotely tune frequencies in real time, and ISL demonstration using SDRs. This mission could contribute to atmospheric science, and the measurements could be incorporated into the global atmospheric databases for climate and weather prediction models. | |||||||
| 言語 | en | |||||||
| 目次 | ||||||||
| 内容記述タイプ | TableOfContents | |||||||
| 内容記述 | 1 Introduction | 2 Literature Review | 3 Satellite and Ground Systems Design Configuration | 4 Intersatellite Link Ranging and Constellation Management | 5 Water Vapor Measurement Concept, Frequency Manipulation and Mission Determination Based on Time Delay Evaluations 6 | Discussions, Conclusion and Future Work | |||||||
| 言語 | en | |||||||
| 備考 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 九州⼯業⼤学博⼠学位論⽂ 学位記番号：工博甲第583号 学位授与年⽉⽇: 令和5年12⽉27⽇ | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Atmospheric Water Vapor Content | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Total Electron Content | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Intersatellite Link | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Frequency Manipulation | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Software Defined Radio | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Small Satellites | |||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲第583号 | |||||||
| 学位名 | ||||||||
| 学位名 | 博士（工学） | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2023-12-27 | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 17104 | |||||||
| 学位授与機関名 | 九州⼯業大学 | |||||||
| 学位授与年度 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 令和5年度 | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.18997/0002000366 | |||||||
| ID登録タイプ | JaLC | |||||||
