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| 題 名 | GPS/Galileo單頻即時動態定位效能分析=A Feasibility Study of GPS/Galileo Single-frequency RTK Positioning |
|---|---|
| 作 者 | 沈力洋; 楊名; 陳鶴欽; | 書刊名 | 地籍測量 |
| 卷 期 | 29:2 2010.06[民99.06] |
| 頁 次 | 頁1-13 |
| 分類號 | 440.98 |
| 關鍵詞 | 即時動態定位; 全球導航衛星系統; 虛擬參考站; 單頻; E-GPS; RTK; GNSS; VRS; Single-frequency; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | GPS即時動態定位(Real-Time Kinematic, RTK)是目前最廣泛被應用在測量工程中的衛星定位技術,相較於傳統雙頻RTK,單頻接收儀的週波值解算效率明顯較差,使得實務應用仍有困難。然而在不久的未來情況將有所改變,歐洲的導航衛星系統Galileo於2013年即將加入運作,預期將有更強的衛星幾何及觀測數量以加速單頻RTK的解算效率,更重要的是單頻接收儀在儀器價格上將有其優勢,因此是極具潛力的RTK設備。為降低基線距離限制,研究中將配合台灣e-GPS系統之虛擬參考站(Virtual Reference Station, VRS)技術進行RTK,藉由整天24小時真實單頻接收儀觀測量與模擬產生的GPS/Galileo觀測量來驗證單頻RTK之效能。實驗將RTK系統分成三種組合:(1)GPS/Galileo雙系統單頻:L1/E1;(2)GPS單系統雙頻:L1/L2;(3)GPS單系統單頻:L1。成果顯示出未來的GPS/Galileo整合系統單頻RTK週波值解算效益將是最高,不僅優於現行的GPS單、雙頻,在定位精度方面也顯示整合系統單頻RTK之3-D RMS為三種系統中最好。隨著多系統GNSS時代的到來,研究成果指出未來使用GPS/Galileo單頻接收儀施測之效益與精度將會超越傳統的GPS雙頻接收儀,配合現行e-GPS系統,將是台灣RTK使用者最有效、最經濟之定位模式。 |
| 英文摘要 | Real-Time Kinematic (RTK) positioning is the most widely used GNSS technique in surveying engineering. The single-frequency receivers have the cost advantage, but single-frequency RTK lacks enough measurements for quick and reliable carrier phase ambiguity resolution. This situation is about to change. The European Galileo constellation is scheduled to be completed by 2013 and it will be interoperable with the existing GPS system. This combined system (GPS/Galileo) will provide twice as many satellites as today’s GPS, and thus it should substantially promote the application of single-frequency RTK. This research is aiming at exploring future single-frequency RTK performance associated with the GPS/Galileo combined system and Taiwan e-GPS system, as compared with today's GPS dual-frequency RTK. The performance of integer phase ambiguity resolution was assessed with 24-h actual GPS data and simulated GPS/Galileo data in three different scenarios: (1) single-frequency GPS/Galileo (GPS L1/Galileo E1), (2) dual-frequency GPS (GPS L1/L2), and (3) single-frequency GPS (GPS L1). Comparison results show that, among the three scenarios, the best ambiguity resolution performance is achieved with single-frequency GPS/Galileo and also have the best 3-D RMS. This indicates that the future dual-system RTK can be practically built with low-cost single-frequency receivers. It should have a great impact on many engineering applications. |
本系統中英文摘要資訊取自各篇刊載內容。