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Method for positioning network RTK based on star-shaped virtual reference station

A technology of virtual reference station and star structure, which is applied in the field of RTK positioning of virtual reference station network based on star structure, which can solve the problems of affecting the accuracy of correction numbers, the reduction of positioning accuracy, and not making full use of redundant observation information of multiple reference stations. Achieve the effect of high precision and reliability, fast fixing speed

Inactive Publication Date: 2011-01-12
SOUTHEAST UNIV
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Problems solved by technology

However, this triangular network structure also has some deficiencies, mainly in: (1) It uses a single baseline calculation mode, which does not make full use of the redundant observation information of multiple reference stations, resulting in ambiguity for long baselines and low elevation angle satellites It takes a long time to fix the degree, which is not conducive to the initialization of large-scale reference station network; (2) the information of independent baselines is less (2 baselines), so the mathematical models available for interpolation calculation are limited (model parameters <= 2) Therefore, the accuracy of the correction number is affected to a certain extent, especially for areas with large elevation differences, the positioning accuracy will be reduced; (3) For areas other than the basic calculation unit, the correction accuracy varies with the distance increase sharply

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  • Method for positioning network RTK based on star-shaped virtual reference station
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  • Method for positioning network RTK based on star-shaped virtual reference station

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Embodiment Construction

[0055] see figure 1 , 2 :

[0056] (1) Establish the basic calculation unit of the star structure:

[0057] 1) Build an irregular triangular network according to the principle of Delaunay triangular network construction for the entire CORS network;

[0058] 2) Select several reference stations in the CORS network as the central reference station. The principle of selection is that the number of baselines formed by the central reference station and other reference stations is the least and the central reference station must be located within the boundary of the Delaunay triangulation network. The rest of the reference stations are used as Auxiliary reference station, forming a star structure basic calculation unit;

[0059] 3) The entire network is divided into several subnets according to the number of central reference stations, and these subnets are constructed in a star topology and named after the central reference station.

[0060] (2) After the star structure network...

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Abstract

The invention discloses a method for positioning a network RTK based on a star-shaped virtual reference station, which comprises the steps of: firstly, establishing a star-shaped basic calculation unit, constructing a baseline calculation way for a star-shaped VRS network RTK and proposing an ambiguity calculation method suitable for the star-shaped VRS network RTK; and then studying the algorithm of the corrections of the ionosphere and the troposphere in the VRS network RTK aiming at the star shape. The method markedly increases the calculation speed on the network ambiguity by about 50% and has higher accuracy and reliability of the generated network correction.

Description

technical field [0001] The present invention relates to a continuous operation reference station (CORS) system inter-station star structure network, a fixed method of the whole cycle ambiguity network and the calculation of network error correction number, especially relates to a star structure based GNSS network differential positioning system Virtual reference station (VRS) network RTK positioning method. Background technique [0002] GNSS network differential positioning technology is currently a popular technology in the field of satellite positioning. It is widely used in surveying and mapping, land and resources survey and other industries. The rise of network differential technology represented by virtual reference station (VRS) technology has enabled the establishment of a base station network GPS service system Become the latest trend in the development of current GPS technology applications. As a GPS real-time dynamic positioning technology in a multi-reference st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/14G01S19/42G01S19/44
Inventor 潘树国王庆沈雪峰王伟亮
Owner SOUTHEAST UNIV
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