相位绕转误差对实时动态PPP数据预处理的影响分析
Influences of Wind-up on Data Preprocessing in Real-time Dynamic PPP
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摘要: 分析了相位绕转误差对Melbourne-Wubbena(MW)和Geometry-Free(GF)组合观测值的影响。结果表明,相位绕转误差对MW组合观测值没有影响,但会影响GF组合观测值,可能会导致GF组合周跳探测发生误判。因此提出在实时动态PPP数据预处理时,采用星间单差GF组合来辅助非差GF组合探测周跳。实验结果表明,该方法可以消除相位绕转误差对周跳探测的影响。Abstract: Melbourne-Wubbena(MW) and Geometry-Free(GF) combinations are usually used for cycleslip detection in real-time dynamic PPP,but wind-up error caused by the rotating of receiver's antenna,is usually ignored.We discuss the influences of wind-up error on MW and GF combinations.The analysis and experimental results show that wind-up error has no influence on MW combinations while it will affect GF combinations.Sometimes it may even cause a false cycle-slip detection by using GF combinations.Considering the influences of wind-up error on GF combinations,this essay proposes that with both undifferenced GF combinations and the differenced combinations between satellites a new method can be sused to detect the cycle-slip in real-time dynamic PPP and it shows the new method can successfully eliminate the effect of wind-up error.
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