Multimode GNSS (Global Navigation Satellite System) satellite selection method and system based on weighted stress balance
A force balance and star selection technology, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc. The effect of reducing the number
Active Publication Date: 2018-11-09
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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[0004] The purpose of the present invention is to provide a multi-mode GNSS star selection method based on weighted force balance, in order to solve the problem that the process of the existing star selection method is relatively complicated
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[0076] Such as figure 1 As shown, a multi-mode GNSS star selection method based on weighted force balance includes the following steps:
[0077] (1) Configure the number of satellites required for navigation and positioning and the satellite elevation angle threshold;
[0078] (2) Determine the visible satellites according to the navigation message and calculate the altitude and azimuth of the visible satellites;
[0079] (3) Obtain the force situation corresponding to each visible satellite;
[0080] (4) Divide the visible satellites into different regions according to the elevation angle and azimuth angle;
[0081] (5) Combine according to the determined number of satellites in different areas required for navigation and positioning, and obtain the resultant force of the force corresponding to the combination of visible satellites according to the force of the obtained visible satellites. Among them, the combination of satellites with the smallest resultant force is naviga...
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The invention relates to a multimode GNSS (Global Navigation Satellite System) satellite selection method and system based on weighted stress balance. The satellite selection method comprises the following steps of: configuring numbers of satellites required for navigation positioning and a satellite elevation angle threshold value; determining visible satellites according to a navigation message,and calculating elevation angles and azimuth angles of the visible satellites; obtaining a stress condition corresponding to each visible satellite; dividing the visible satellites into different regions according to the elevation angles and the azimuth angles; carrying out combination according to the determined numbers of the satellites in different regions, which are required for navigation positioning, obtaining resultant forces of stresses of visible satellite combinations according to the obtained stress conditions of the visible satellites, and determining the satellite combination with the minimum resultant force as a required satellite combination. The satellite combination is selected and solved by utilizing a weighted stress balance method, a high-timeliness high-accuracy positioning result can be obtained, and real-time performance, accuracy and robustness are higher. Moreover, a great amount of matrix operations in a conventional satellite selection algorithm are reduced,few calculation resources are occupied, and real-time performance of the satellite selection algorithm is improved.
Description
technical field [0001] The invention relates to a multi-mode GNSS star selection method and system based on weighted force balance. Background technique [0002] With the rapid development of the global satellite navigation and positioning system, the number of visibility will increase dramatically during navigation and positioning. The traditional GNSS star selection method based on the traversal method to find the combination of the minimum GDOP value requires a large number of matrix operations, which occupies a large amount of computing resources and affects the real-time performance of navigation and positioning. The follow-up improved optimization method still has the problem of many star selection combinations and excessive calculation, while the GNSS star selection algorithm based on the variable weight vector sum reduces a large number of matrix operations according to the force balance idea, and has real-time and accuracy. , robustness and other advantages. [00...
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IPC IPC(8): G01S19/28
CPCG01S19/28
Inventor 陈明剑魏金本李俊毅李万里李广云汪威
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU