Geometric precision factor calculation method for dual-constellation integrated navigation system

A technology of geometric precision factor and integrated navigation system, applied in the field of satellite navigation, can solve problems such as large amount of calculation, achieve accurate calculation, overcome the divergence of calculation process, and overcome the effect of large amount of calculation

Inactive Publication Date: 2016-05-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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[0010] The purpose of the present invention is: in order to solve the problems of large amount of calculation in the prior art, the pr

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  • Geometric precision factor calculation method for dual-constellation integrated navigation system
  • Geometric precision factor calculation method for dual-constellation integrated navigation system
  • Geometric precision factor calculation method for dual-constellation integrated navigation system

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[0038] In order to make the objectives, technical solutions, and advantages of the present invention clearer and more comprehensible, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0039] A method for calculating the geometric precision factor of a dual-constellation integrated navigation system. The geometric precision factor calculation formula is:

[0040]

[0041] Among them, GDOP is the geometric precision factor, and the geometric matrix h i Represents the direction cosine vector related to the initial position of the receiver and the satellite coordinates, i=1,...,(α+β), α and β represent the number of satellites in the dual-constellation integrated navigation system, tr(·) represents the matrix trace, W Is the weighting matrix, H T Is the transposed matrix; when the g...

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Abstract

The invention discloses a geometric precision factor calculation method for a dual-constellation integrated navigation system. According to a calculation formula for calculating the geometric precision factor of the dual-constellation integrated navigation system, when a geometric matrix H is in the form of a square matrix, the calculation formula for calculating the geometric precision factor is converted. Through calculating a det(HHTW) and a tr[adj(HHTW)], the geometric precision factor of the dual-constellation integrated navigation system can be obtained. According to the technical scheme of the invention, the conventional calculation formula is converted and the det(HHTW) and the tr[adj(HHTW)] are respectively calculated. In this way, the defect that the traditional calculation method is large in calculation amount and divergent in calculation process can be overcome. Meanwhile, the rapid and accurate calculation of the geometric precision factor of the dual-constellation integrated navigation system is realized.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, and in particular relates to a calculation method for a geometric precision factor of a dual-constellation integrated navigation system. Background technique [0002] Global Navigation Satellite System (Global Navigation Satellite System, GNSS) is widely used in many fields such as carrier navigation, positioning and timing. With the continuous improvement and development of satellite navigation systems, combining two single constellations to form a dual-constellation integrated navigation system (such as GPS / GLONASS system, GPS / Galileo system, etc.), can effectively improve system positioning accuracy, continuity, availability and Integrity, thereby improving navigation and positioning performance. [0003] In satellite navigation systems, Geometric Dilution of Precision (GDOP) is of great significance for satellite selection, positioning accuracy evaluation, and system pathologica...

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Application Information

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IPC IPC(8): G01S19/01
CPCG01S19/01
Inventor 滕云龙黄琦井实李坚卢有亮
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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