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Phase integer ambiguity reliability checking method in GPS positioning technology

A GPS positioning and whole-week ambiguity technology, applied in the field of GPS positioning, can solve the problems of incomplete quadratic independence and non-compliance of ratios.

Inactive Publication Date: 2012-04-25
SOUTHEAST UNIV
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Problems solved by technology

However, since the second smallest and smallest residual quadratic models are not completely independent, their ratio does not obey the F distribution, it is only an approximation, therefore, the F distribution method also has certain limitations

Method used

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  • Phase integer ambiguity reliability checking method in GPS positioning technology
  • Phase integer ambiguity reliability checking method in GPS positioning technology
  • Phase integer ambiguity reliability checking method in GPS positioning technology

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Embodiment Construction

[0051] The method of the present invention is based on the mathematical statistical characteristics of the ambiguity solution. First, the stability of the floating-point solution is checked by the maximum rate of change of the least squares parameter estimation to ensure the statistical characteristics of the floating-point solution. On this basis, the variance post-test is adopted. Secondly, by establishing the functional relationship between the ambiguity integer estimation failure rate and the Ratio test threshold, the Ratio test threshold is determined by using the given reliability index—the ambiguity integer estimation failure rate c , and finally, the traditional Ratio test method is used to realize the reliability test of the integer value of the ambiguity sought. For the specific process, see figure 1 .

[0052] Example: This method is used in the reliability test of ambiguity resolution among Tianjin CORS reference stations. The Tianjin CORS reference station networ...

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Abstract

The invention discloses a phase integer ambiguity reliability checking method in a GPS positioning technology. Based on a mathematical statistic characteristic of an ambiguity resolution, examinations are performed successively to the reliability of an ambiguity floating point solution and an integer solution. The method is characterized by: firstly, examining floating point solution stability through a least square parameter valuation maximum variation rate so as to ensure the statistic characteristic of the floating point solution, on that basis, using a variance posteriori inspection method to examine the reliability of the floating point solution; secondly, based on an ambiguity success rate examination theory, establishing a function relation between an ambiguity integer valuation failure rate and a traditional ratio examination threshold c so that a given reliable index-the ratio examination threshold c determined by the ambiguity integer valuation failure rate is used and the traditional ratio examination threshold is easy to be determined; finally, through the ratio inspection method, realizing the reliability examination of the ambiguity integer valuation and obtaining anambiguity accuracy value.

Description

technical field [0001] The invention relates to a phase integer ambiguity reliability checking method in GPS positioning technology, belonging to the technical field of GPS positioning. Background technique [0002] The key to precise GPS positioning is the determination of 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, wrong ambiguity will directly prolong the initialization time of positioning and reduce positioning accuracy. Therefore, ambiguity reliability testing is an important content in ambiguity resolution. [0003] At present, the traditional ambiguity reliability inspection process can be summarized into three steps: first, the correctness inspection of the ambiguity floating-point solution; second, whether the d...

Claims

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Application Information

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IPC IPC(8): G01S19/44
Inventor 潘树国王庆邓健
Owner SOUTHEAST UNIV
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