GNSS carrier phase integral cycle ambiguity single epoch solution method

A technology of whole cycle ambiguity and carrier phase, applied in the field of global satellite navigation and positioning, it can solve the problem of difficulty in ensuring the success rate of single epoch solution of ambiguity, and achieve the effect of accurate solution
CN105223598AActive Publication Date: 2016-01-06XIAMEN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN UNIV OF TECH
Publication Date
2016-01-06

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Abstract

The invention discloses a GNSS carrier phase integral cycle ambiguity single epoch solution method. The method comprises the steps that three-frequency observation data in a Beidou satellite navigation system are used to build optimal combination observation; single epoch fixation is carried out on ultra-wide lane / wide lane and base carrier ambiguity in order; a Beidou satellite with high fixed ambiguity reliability is preferably selected to inverse atmospheric delay information; the information is used as priori information to enhance a GPS / GLONASS ionosphere-free combination ambiguity solution model; correlation between the zenith and troposphere and ambiguity parameters is reduced; the morbidity of the model is weakened; a robust estimation theory is introduced; and through the influence of the bias of a right election iterative boycott model or outliers, ambiguity single epoch accurate solution in a GPS / GLONASS dual-frequency navigation system is realized. The solution method is suitable for a short distance relative positioning mode. The advantage of the three-frequency observation data of the Beidou navigation system is used to constrain and assist the ambiguity solution of other satellite navigation systems. The robust estimation theory is introduced, which improves the reliability of ambiguity solution.
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Description

technical field

[0001] The invention belongs to the technical field of global satellite navigation and positioning, in particular to a single epoch solution method for carrier phase integer ambiguity in short-distance relative positioning of GNSS global satellite navigation systems (including Beidou BDS, GPS, and GLONASS). Background technique

[0002] The key to precise positioning using the Global Navigation Satellite System (GNSS) is the determination of the carrier phase integer ambiguity. Accurate and fast resolution of the ambiguity of the entire circumference is very important, whether it is to shorten the observation time, ensure the positioning accuracy, or to open up new fields of high-precision dynamic positioning applications. In practical applications, the wrong ambiguity will directly prolong the initialization time of positioning and reduce the positioning accuracy. Therefore, fast and accurate resolution of ambiguity is a key issue in realizing high-precision...

Claims

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