Abstract: Carrier phase observables is the basis of high-precision satellite navigation and positioning and its related applications. The correct resolution of the integer ambiguity is the key to achieve centimeter-level navigation, positioning and nano-level timing. Cycle slip detection and repair will directly affect the performance of integer ambiguity resolution, especially for the core infrastructure of high-precision location service such as CORS (continuous operation of reference station) networks. Ensuring continuous and reliable ambiguity resolution is important to achieve high-precision location service. The reference station receiver has the characteristics of high accuracy, static, and a high sampling frequency (generally 1 Hz), et al. In a short time interval, the errors of ionospheric delay, tropospheric delay, and hardware delay have a strong correlation. Based on the above characteristics, this paper applies the inter-epoch difference method to the reference station cycle slip detection and repair. Refer to the characteristics of the reference station stationary, a cycle slip detection and repair method suitable for the reference station is proposed. This method does not require multi-frequency combination of observations while avoids the influence of pseudorange noise. It has high detection accuracy, and can detect each frequency of a single station separately. In the process of cycle slip repair, It considers the non-integer gross error and removes it. Experiments show that this method can accurately detect and repair the whole week cycle slip of 1 week, and can detect the non-integer gross error with decimal deviation more than 0.1 week.

Key words: reference station, non-combination, cycle slip detection, cycle slip repair, non-integer gross error