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Beidou system positioning precision calculation method

A positioning accuracy and calculation method technology, applied in the field of satellite positioning precision algorithm, can solve the problems that GPS positioning cannot be used indoors, base station positioning accuracy is low, etc.

Inactive Publication Date: 2019-09-27
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

However, the disadvantages of the above-mentioned base station positioning are that the

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  • Beidou system positioning precision calculation method
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  • Beidou system positioning precision calculation method

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0061] Such as figure 1 The schematic diagram of the ranging principle of the second-generation Beidou global positioning system is shown. The second-generation global positioning system of the Beidou is a typical RNSS (Radio Determination Satellite Service, satellite radio determination service) positioning system, which requires at least four synchronous satellites to complete the user coordinates. positioning.

[0062] The Beidou satellite system is connected with the ground center control system through satellite signals. The Beidou ground control center sends the inquiry signal sent by the Beidou operation service center to the Beidou satellite. The Beido...

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Abstract

The invention discloses a Beidou system positioning precision calculation method. The Beidou system positioning precision calculation method comprises the following steps that: step 1, the distance measurement information of m geosynchronous satellites is acquired, and m nonlinear coordinate equations are established; step 2, the nonlinear equations are converted into linear equations through a Taylor series expansion method; and step 3, the least square method is used to solve the least square method solutions of the linear equations, and the least square method solutions are iteratively calculated until the correction quantity of an iteration result is smaller than an error threshold value, and user coordinates can be solved. With the method of the invention adopted, calculation errors can be smaller than a preset threshold value, for example, the errors can be accurately located within a centimeter range; positioning requirements can be met; and the rapid and high-precision positioning of the user coordinates can be realized.

Description

technical field [0001] The invention relates to the field of precise satellite positioning algorithms, in particular to a method for calculating the positioning precision of the Beidou system. Background technique [0002] The currently widely used positioning method is base station positioning. Base station positioning is mainly used in mobile phone users, GPS handheld terminals, etc., such as the dynamic location query service provided by China Mobile M-Zone, the rough positioning in various mobile phone map software such as Google Mobile Maps, and the A-GPS produced by cooperating with GPS, etc. It is realized by base station positioning. However, the disadvantages of the above-mentioned base station positioning are that the accuracy of the base station positioning is low and the GPS positioning cannot be used indoors. [0003] Based on the above, the calculation method based on the precise positioning of the Beidou system can improve the positioning accuracy and achiev...

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Application Information

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IPC IPC(8): G01S19/42
CPCG01S19/425
Inventor 龚震东肖烨辉王和杰郑斌毅
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO