Method and apparatus for detecting Beidou triple frequency cycle slip

Abstract

The invention relates to a method and an apparatus for detecting Beidou triple frequency cycle slip. The method comprises the steps of: establishing a MW combination observation equation using the Beidou B2 and B3 signals, and a first geometry-free phase combination observation equation and a second geometry-free phase combination observation using the Beidou B1, b2, and B3 signals; sequentially obtaining a first, a second and a third cycle slip detection amount by differentiating the ambiguity values between epochs; and determining that the cycle slip is occur when the absolute value of the first cycle detection amount is not equal to zero, the absolute value of the second cycle detection amount is greater than or equal to a first set threshold, and the absolute value of the third cycle detection amount is greater than or equal to a second set threshold. According to the method and the apparatus of the invention, the cycle slip detection is accurate, and the cycle slip of 1 week and above can be effectively detected. The method and the apparatus are suitable for real-time and dynamic cycle slip detection.

Description

technical field [0001] The invention belongs to the field of Beidou navigation and positioning data preprocessing, and in particular relates to a Beidou triple-frequency cycle-slip detection method and device. Background technique [0002] Due to the obstruction of obstacles or the interference of the receiver by the signal during the observation process, the satellite signal will lose lock, and the carrier phase observation value will jump throughout the cycle. The occurrence of cycle jump will affect the high-precision application of Beidou data. my country's Beidou system will complete the global network construction in 2020. The Beidou signal uses a triple-frequency signal, which will make the detection of cycle slips more stable and reliable. As an important part of Beidou system's data preprocessing, cycle slip detection technology plays a vital role in high-precision positioning and navigation applications. [0003] At present, due to the influence of pseudorange obs...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a Beidou three-frequency cycle slip detection method and device, which are used to solve the problem that the existing pseudo-range phase method cannot detect small cycle slips and the accuracy of detecting cycle slips is low, and solve the frequency point when detection Unable to detect cycle slips when the same or similar cycle slips occur

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