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研究生: 甘士鼎
Kan, Shih-Ting
論文名稱: 台灣地區星基增強系統於電離層模型之研究
Analysis of the Satellite Based Augmentation System in Taiwan with an Emphasis on Ionosphere Modeling
指導教授: 何慶雄
Ho, Ching-Shun
學位類別: 碩士
Master
系所名稱: 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 77
中文關鍵詞: 全球定位系統格點模型電離層誤差修正星基增強系統
外文關鍵詞: GPS, SBAS, grid model, Ionosphere correction
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  •   本論文以雙頻接收器收集台灣地區電離層資料,並且提供三種計算電離層誤差的方法。由這三種方法與內政部以及國外網站所提供的全球定位系統(GPS)參考追蹤站網路的資料,一起架構出二維電離層誤差修正格點模型來相互比較,其格點模型的架構方式是以星基增強系統(SBAS)為基礎所發展出來的模型。換句話說,這個格點模型是類似於星基增強系統(SBAS)的格點模型,因此對於現今星基增強系統(SBAS)的電離層修正模型在台灣的性能,可以做進一步的探討。另外也針對資料處理的過程之中,對於系統取樣數目的分析,來求得最適合的系統取樣。由以上評估作為未來台灣星基增強系統(SBAS)建置之考量。

     This paper uses dual-frequency GPS/WAAS receivers to collect the ionosphere data around Taiwan. Three different methods are applied to compute the ionosphere delay. The computed delay from the three methods will be combined with the ionosphere delay generated by a grid model from a geographically distributed GPS network. The GPS network consists of the tracking sites from the Land Survey Bureau, Minister of the Interior and from the international network. The observation data from this GPS network is used to construct the ionosphere grid model based on the current SBAS algorithm. In other words, this GPS network is simulated as a SBAS network. Thus, the performance of SBAS’s ionosphere correction in Taiwan could be studied. In addition, the sampling rate of the system is analyzed in the data processing. As a result, a suitable rate is yielded. The overall result will be beneficial to the further SBAS implementation in Taiwan.

    論文摘要..............................................................................................I 英文摘要.............................................................................................II 誌謝....................................................................................................III 目錄....................................................................................................IV 表目錄..............................................................................................VII 圖目錄.............................................................................................VIII 第 一 章 緒論......................................................................................01 1-1 研究背景 ......................................................................................01 1-2 研究動機 ......................................................................................04 第 二 章 系統、資料處理與實驗設備介紹......................................06 2-1 全球定位系統(GPS, Global Positioning System)及誤差來源......06 2-2 星基增強系統(SBAS, Satellite Based Augmentation System).......09 2-3 資料處理.......................................................................................11 2-3-1 電離層斜距誤差的計算............................................................11 2-3-2 穿刺點(Pierce Point)的計算.......................................................13 2-3-3 格點模型的形成........................................................................16 2-4 實驗設備.......................................................................................17 2-4-1 主動式天線................................................................................17 2-4-2 NovAtel FlexPak-G2L GPS L1L2雙頻接收器............................17 2-4-3 實驗軟體....................................................................................18 第 三 章 原始資料處理與實驗步驟..................................................19 3-1 原始資料(Raw Data)的處理.........................................................19 3-2 實驗步驟.......................................................................................20 3-2-1 單點測試....................................................................................22 3-2-2 多點測試....................................................................................23 3-2-3 二維模型的建構........................................................................24 3-2-4 航路與電離層格點模型分析....................................................24 第 四 章 實驗結果分析......................................................................26 4-1 衛星仰角的影響...........................................................................26 4-2 單點固定點分析...........................................................................27 4-3 多點分析.......................................................................................28 4-4 平面分析.......................................................................................32 4-5參考追蹤站分析............................................................................37 4-6 寬域分析.......................................................................................39 第 五 章 結論與建議..........................................................................44 5-1 結論...............................................................................................44 5-2 建議...............................................................................................47 參考文獻.............................................................................................51 註解.....................................................................................................54 自述.....................................................................................................77

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