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Real-time dynamic positioning method for baselines with different lengths

A real-time dynamic positioning and baseline technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problem of seamless connection of positioning performance of baselines of different lengths, so as to weaken the impact of ionospheric residuals , improve the accuracy and convergence speed, and accelerate the separation effect

Active Publication Date: 2019-01-01
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a real-time dynamic positioning method suitable for baselines of different lengths, so as to solve the problem that the positioning performance of baselines of different lengths cannot be seamlessly connected in the prior art

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  • Real-time dynamic positioning method for baselines with different lengths
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  • Real-time dynamic positioning method for baselines with different lengths

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The purpose of the present invention is to provide a real-time dynamic positioning method suitable for baselines of different lengths, so as to solve the problem in the prior art that the positioning performance of baselines of different lengths cannot be seamlessly connected.

[0041] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below i...

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Abstract

The invention discloses a real-time dynamic positioning method for baselines with different lengths. Elevation angles and observation weights of different satellites are determined to obtain a stochastic model of different combined observation values; a double-difference wide-lane combination equation is formed, a phase wide-lane combination observation equation after double-difference wide-lane whole-cycle ambiguity fixation is used as a virtual pseudo-range observation equation, and a virtual double-difference pseudo-range observation equation and a carrier phase ionospheric-free combinationobservation equation are calculated; and according a fixed double-difference wide lane and narrow-lane whole-cycle ambiguity, real-time dynamic positioning calculation with the ambiguity being an integer solution is carried out to obtain a real-time dynamic positioning coordinate. According to the method disclosed by the invention, with the phase wide-lane combination observation equation after double-difference wide-lane whole-cycle ambiguity fixation as the virtual pseudo-range observation equation, the ionospheric residual influence is weakened and the pseudo-range observation precision isimproved, so that seamless connection of real-time dynamic positioning of baselines with different lengths is realized.

Description

technical field [0001] The invention relates to the technical field of real-time dynamic positioning, in particular to a real-time dynamic positioning method applicable to baselines of different lengths. Background technique [0002] Real Time Kinematic (RTK) is a high-precision satellite navigation positioning method. Users can obtain centimeter-level positioning results in real time, so it is widely used in high-precision engineering fields such as control measurement and deformation monitoring. There are two conventional RTK data processing methods, one is the combination of single-frequency pseudorange and carrier phase, which is suitable for short baseline users; the other is the combination of pseudorange and carrier phase without ionosphere, which is suitable for long baseline users. At present, there is no solution to realize the unified processing of RTK positioning data of baselines of different lengths, and the seamless switching of RTK positioning performance of...

Claims

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Application Information

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IPC IPC(8): G01S19/42G01S19/41
CPCG01S19/41G01S19/42
Inventor 涂锐卢晓春刘金海张鹏飞张睿张兴刚黄小东
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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