賴允斌,趙春梅,李子申
(1.山東科技大學測繪科學與工程學院,山東 青島 266590;
2.中國測繪科學研究院大地測量與地球動力學研究所,北京 100830;
3.中國科學院光電研究院,北京 100094)
數據中斷對實時精密單點定位的影響分析
賴允斌1, 2,趙春梅1,2,李子申3
(1.山東科技大學測繪科學與工程學院,山東 青島 266590;
2.中國測繪科學研究院大地測量與地球動力學研究所,北京 100830;
3.中國科學院光電研究院,北京 100094)
摘要:實時精密單點定位的應用日趨廣泛,而收斂速度是其優(yōu)劣的一個重要指標,在定位作業(yè)時要盡量避免多次重新收斂。利用自主研發(fā)的軟件,分析了實時觀測數據中斷對實時精密單點定位的影響。采用基于廣播星歷的實時SSR改正數據的精密軌道和鐘差進行實時精密單點定位。結果表明:連續(xù)60 s的數據中斷會導致實時精密單點定位需要重新收斂;而頻繁短時間中斷但不連續(xù)中斷的數據對實時精密單點定位影響不明顯,不會導致重新收斂。
關鍵詞:實時精密單點定位;SSR改正信息;收斂
doi:10.13442/j.gnss.1008-9268.2015.03.005
中圖分類號:P228.4
文獻標志碼:A
文章編號:號: 1008-9268(2015)03-0021-04
收稿日期:2015-03-13
作者簡介
Abstract:The application of real-time precise point positioning is becoming more and more widely, and the convergence speed is an important index of its quality. People should try to avoid multiple re-convergence in the positioning work.Utilizing the self-developed software,The paper analyzed the effect on real-time precise point positioning when the real-time data were disrupted.The precise orbit and clock in real-time precise point positioning were SSR correction data which were based on broadcast ephemeris.The results show that the disruption of continuous 60 s data would lead to real-time precise point positioning converge again,but,disrupted frequently but discontinuously data had no obvious effect on real-time precise point positioning,it needs no once more convergence.
0引言
目前,實時精密單點定位(RT-PPP)的應用越來越廣泛。實時精密單點定位具有實時性、單臺接收機實現點位的三維位置的確定、定位不受距離限制、作業(yè)靈活等優(yōu)點[1],許多學者和研究機構對其進行了相關的研究,取得了一系列成果[2]。武漢大學尹倩倩等通過PANDA軟件,利用國際GNSS服務(IGS)組織實時精密軌道鐘差產品進行實時靜態(tài)模擬動態(tài)精密單點定位,取得了厘米級的實驗結果[3]。……