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 Edit Method for Dual-frequency GPS Receiver

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。

Considering the limitations of TurboEdit, an improved cycle-slip detection method named the two-step method is proposed for dual-frequency GPS receivers. Firstly, the new method detects wide-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 L1 based on the check conditions extracted from a moving window of the first-order difference quotient of PIR （phase ionospheric residual） combination observations which have been removed wide-lane cycle slips. The experimental results show that the new method can effectively suppress noise, and superior to TurboEdit for detecting small cycle slips. It can also explore when cycle-slips exist in both two carrier phases.