Abstract:

Cycle slip is a common error source in GNSS’s carrier phase measurements. Detecting and repairing cycle slip is a extremely important and difficult step in GNSS pre-processing. All GNSS software have to implement it before processing baselines. In this article, we introduce a few algorithms to detect cycle slip in case of using single GNSS reiceiver.The experimental results show that, the phase-code comparison method can only detect cycle slip when it occurred in higher level (a few dozen cycles), the phase – phase ionospheric residual method has possibility to detect cycle slip with lower level (a few cylces). Depending on specific circumtances, we can use different algorithms to detect cycle slip