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A Single Epoch Resolution Method for GNSS Carrier Phase Integer Ambiguity

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

Active Publication Date: 2017-07-11
XIAMEN UNIV OF TECH
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Problems solved by technology

On the one hand, the above two types of methods are difficult to guarantee a 100% success rate in ambiguity single epoch resolution. On the other hand, these methods are mainly for a single satellite navigation and positioning system, such as GPS or Beidou, and for the combined application of multiple satellite navigation and positioning systems. , its effectiveness and reliability need further research

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  • A Single Epoch Resolution Method for GNSS Carrier Phase Integer Ambiguity

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[0053] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, the present invention provides a single epoch solution method for GNSS carrier phase integer ambiguity, which is different from the conventional overall solution algorithm for ambiguity, and includes the following steps:

[0055] (1) Use the three-frequency observation data in the Beidou satellite navigation system to construct the optimal combination of observations, and then fix the ultra-wide lane / wide lane and the basic carrier ambiguity in a single epoch; specifically include the following:

[0056] 11) Basic equation of combined observations

[0057] Assume that the three carrier frequencies of Beidou are f 1 , f 2 , f 3 , through the linear combination of frequency observations, the double-difference carrier phase combination observations can be obtained and double-differ...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/44G01S19/42
CPCG01S19/425G01S19/44
Inventor 邓健王胜利
Owner XIAMEN UNIV OF TECH
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