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題 名 | 瞬間定位技術在長距離即時定位之探討=The Single Epoch Ambiguity Function Technique over Long Baselines |
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作 者 | 鄒永龍; | 書刊名 | 測量工程 |
卷 期 | 42:4 2000.12[民89.12] |
頁 次 | 頁59-66 |
分類號 | 440.98 |
關鍵詞 | 即時定位; 瞬間定位技術; 起始作業; 再起始作業; RTK; Single epoch ambiguity function technique; Initialization; Re-initialization; |
語 文 | 中文(Chinese) |
中文摘要 | 現今,許多即時定位技術已可達公分級之定位精度,然而僅侷限於短距離之應用。在定位作業期間,大多數之技術能仍須幾十秒之起始作業時間以及持續鎖定衛星訊號。尤其,當衛星訊號受阻中斷時,起始作業須重新開始,此一限制對於某些應用是全然無法接受的。瞬間定位技術為一無須起始作業時間之定位技術,具有超越現有其它技術提供瞬間定位之優越性。此一技術經過兩階段之研究,在短距離(小於十公里)及良好之作業環境下已可達公分級及定位精度。為擴展其在長距離定位之應用,本文將對此一技術及其潛在之問題在各不同長度基線作一深入探討。 |
英文摘要 | Currently, many Real Time Kinematic (RTK) techniques can be achieved at centimeter level of positioning accuracy, but however limited to short distance applications. For most of current RTK techniques, an initialization process of about a few tens of seconds and continuous phase lock on satellites are required during the operation of GPS positioning. In particular, the process of re-initialization is necessary as the signals are interrupted during a RTK survey and this is not acceptable for some GPS applications. Without any process of initialization, an algorithm called the single epoch Ambiguity Function Technique has the greatest advantage of providing instantaneous positioning, which is a benefit beyond the capability of other current RTK techniques. After two stages of researches, this technique is available at centimeter level of positioning accuracy over short baselines (<10km) in a benign environment. In order to extend the use of this technique for long distances, the investigation on the AFT performance and the inherent problems over various long baselines will be discussed in this paper. |
本系統中英文摘要資訊取自各篇刊載內容。