Method for jointly detecting and repairing cycle slip by MW combination method and non-geometric phase method

Abstract

The invention discloses a method for jointly detecting and repairing a cycle slip by an MW combination method and a non-geometric phase method. The method comprises the following steps of S1, selecting three-frequency data (B1, B2 and B3) of a Beidou navigation and positioning system to obtain a pseudo-range observation value and a carrier phase observation value; S2, constructing a three-frequency MW combined observation model, establishing a MW equation, and carrying out inter-epoch difference to obtain cycle slip detection amount delta N12 and delta N13; S3, constructing a non-geometric phase observation model; S4, selecting two groups of parameters according to a principle that an ionized layer coefficient and the observation noise of the combined observation data are relatively smallat the same time, calculating the cycle slip of the three frequency points of the two groups of the parameters according to a formula that delta N1 is equal to delta N2 that is equal to delta N3, andselecting a B combination coefficient meeting the actual situation; and S5, combining the delta N12, the delta N13 and the B combination to obtain an equation set, calculating the cycle slip on the three frequency points, and repairing the cycle slip. The method solves the defect that the non-geometric method cannot detect the non-sensitive cycle slip and the MW method cannot detect the equal cycle slip.

Description

technical field [0001] The invention belongs to the technical field of GNSS data processing of a global navigation and positioning system, in particular to a method for jointly detecting and repairing cycle slips by a MW combination method and a non-geometric phase method. Background technique [0002] With the rapid development of the Beidou industry and the continuous expansion of application fields, people have higher requirements for the positioning accuracy of the Beidou satellite navigation system. The premise of the Beidou satellite navigation system to achieve high-precision positioning is to obtain high-quality carrier phase measurements. The accuracy of positioning using carrier phase observations can reach centimeter-level or even sub-millimeter level, which can meet the requirements of higher-precision positioning. However, the peculiar cycle slip phenomenon in the carrier phase observation will have a great influence on the satellite positioning results. Theref...

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Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a method for joint detection and repair of cycle slips by the MW combination method and the geometry-free phase method, which solves the problem that the geometry-free method cannot detect insensitive cycle slips and the MW method cannot detect equal cycles. The defect of jumping; using the triple-frequency data, the excellent characteristics of the triple-frequency data combination can be obtained, and the linear combination with more excellent characteristics than the single- and double-frequency combination

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