一种基于TurboEdit改进的GPS双频观测值周跳探测方法
An Improved Cycle Slip Detection Based on Turbo EditMethod for Dual-frequency GPS Receiver
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摘要: 目的 针对TurboEdit方法的局限性,提出了一种改进的GPS双频观测值周跳探测方法———两步法。该方法首先基于MW(Melborne-Wubbena)组合滑动前后向窗口来进行宽巷周跳探测,然后用经过宽巷周跳修正的电离层残差(phase ionospheric residual,PIR)组合观测值,基于一阶差商滑动窗口来探测L1载波上的周跳。实验结果表明,此方法能有效抑制噪声,在小周跳探测方面较TurboEdit方法具有优越性,并且能探测出两个载波上同时发生周跳的情况。Abstract: Objective Considering the limitations of TurboEdit,an improved cycle-slip detection method namedthe two-step method is proposed for dual-frequency GPS receivers.Firstly,the new method detectswide-lane cycle slips based on test values computed from a forward-backward moving window for MW(Melborne-Wubbena)combination observations,and then detects cycle slips in the carrier phase L1based on the check conditions extracted from a moving window of the first-order difference quotient ofPIR(phase ionospheric residual)combination observations which have been removed wide-lane cycleslips.The experimental results show that the new method can effectively suppress noise,and superiorto TurboEdit for detecting small cycle slips.It can also explore when cycle-slips exist in both two car-rier phases.
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