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題名 | 多路徑效應誤差處理於GPS不等觀測時段差分定位增益之研究=Two Approaches to the Mitigation of Multipath Effects for the Enhancement of Differential GPS with Available Data of Various Obervations |
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作者 | 鄒永龍; 黃秋能; | 書刊名 | 地圖:中華民國地圖學會會刊 |
卷期 | 15 民94.07 |
頁次 | 頁63-76 |
分類號 | 440.98 |
關鍵詞 | 多路徑效應估計法; Multipathing estimations; |
語文 | 中文(Chinese) |
中文摘要 | 由於GPS衛星定位作業之便利、快速及精度高已逐步取代傳統測量作業方式,然而在實際應用上,其定位成果確往往受測站作業環境等影響因素而時常遇到計算成果無法達到要求精度之情事。目前,許多高精度需求之定位作業大都採用長時間觀測方式以達到精度標準,此一方式在某些作業區可能徒增觀測時間、作業人力及成本而最後仍無法解決問題。換言之,許多研究解決方向中,實應找出其影響誤差因素消除之並利用有效之衛星觀測資料提昇其定位精度似乎較為可行。然而,在短距離基線之應用上,由測站作業環境所造成多路徑效應,應為現行定位技術亟待解決之主要關鍵問題。本文將以兩種(TEQC及CCQC)電碼多路徑效應估計法進行不同測站作業環境下不等觀測時段誤差評估及處理,進而在有效觀測時段瞭解相關誤差及問題處理前/後之定位表現,以期能縮短GPS觀測作業時間節省人力及成本。實驗例研究成果顯示原定位成果經CCQC誤差改正後其定位成果精度能明顯提昇且能縮短作業時間。 |
英文摘要 | The high accuracy of the GPS positioning performance has done a much better job than the typical surveying system, still its accomplishment has been reduced by the surrounded environment at the GPS operation station. These days, most positioning performances take a long period of time in surveying to get more accurate standard. However it might wast time, human power, and even money without getting any solutions. In a word, all the defected factors should be digged out and be removed; then the accuracy of surveying will be risen from the available data that works. By the way, the multipath error is considered as the main problem of GPS positioning techniques over short baselines. In order to reduce the effect of multipath for the enhancement of GPS positioning results, the investigation on the estimation and the elimination of the related station errors based on two code multipathing approaches (TEQC and CCQC) is conduced with available data of various observations is different environments of GPS operation stations. The final results have shown that the accuracy of GPS positioning and the periods of surveying time are shortened in the test trials over short baselines can be significantly enhanced after the correction of multipath based on the procedure of CCQC. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。