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Rapid satellite selection method for global navigation satellite system

A technology for global navigation satellites and satellite systems, which is applied in the field of rapid satellite selection of global navigation satellite systems, can solve problems such as unrealistic and increase the calculation amount of positioning solution, so as to reduce the burden, reduce the number of satellite tracking channels, and solve the calculation problems. large amount of effect

Inactive Publication Date: 2009-11-04
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

Because the calculation amount of positioning solution is directly multiplied by the number of positioning satellites used, this increases the calculation amount of subsequent positioning solution, especially for high dynamic users, which is also unrealistic

Method used

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  • Rapid satellite selection method for global navigation satellite system
  • Rapid satellite selection method for global navigation satellite system
  • Rapid satellite selection method for global navigation satellite system

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Embodiment Construction

[0045] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0046] The present invention provides a kind of fast star selection method of global navigation satellite system, and the flow chart of said method is as follows figure 1 shown.

[0047] In a certain observation epoch, the receiver can observe multiple satellites in multiple combined constellations at the same time, and now it is necessary to select a few satellites that meet the positioning requirements for positioning calculation.

[0048] Step 1: Configure parameters.

[0049] According to the positioning needs and receiver performance and the number of combined constellations, configure the maximum number of positioning satellites to be selected, the initial limit requirements of the constellation GDOP value and the masking angle MA.

[0050] Regarding the maximum number of positioning satellites that need to be selected, it is generally not mor...

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Abstract

The invention discloses a rapid satellite selection method for a global navigation satellite system. The rapid satellite selection method carries out the satellite selection on the basis of meeting the navigation positioning requirements, so as to achieve the purposes of reducing the calculation amount of satellite selection and reducing the calculation amount of navigation positioning. Firstly, visible satellites are divided into three regions of high elevation angle, middle elevation angle and low elevation angle according to the size of the elevation angle, the satellite with the largest elevation angle is selected, and then the satellite selection is carried out in the high elevation angle satellites according to the size of the elevation angle of the satellite with the biggest elevation angle. Then an appropriate number of positioning satellites are selected from the middle and the low regions according to the equalization principle of the satellites in constellations. Finally, the satellite selection result is verified according to geometric dilution of precision, and the satellite selection result is amended according to the verification result, thereby leading the satellite selection result to meet the positioning requirements. The method can effectively solves the problem of great calculation amount of the traditional satellite selection method and can realize the simple and rapid satellite selection and is applicable to real-time satellite selection demands under static and dynamic conditions.

Description

technical field [0001] The invention belongs to the field of satellite navigation, and in particular relates to a fast satellite selection method for a global navigation satellite system. Background technique [0002] For decades, the United States' Navigation Satellite Timing And Ranging / Global Positioning System (GPS) and Russia's GLObal NAvigation Satellite System (GLONASS) have developed into The second-generation satellite navigation and positioning system, the EU's Galileo (GALILEO) system and China's BeiDou-2 satellite navigation and positioning system (BeiDou-2, referred to as BD2) are actively preparing for construction. According to reports, the Beidou second-generation satellite navigation system will launch 12 satellites around 2009 to provide basic services for China and surrounding areas. In the near future, these systems will jointly form the Global Navigation Satellite System (Global Navigation Satellite System, referred to as GNSS). By then, there will be ...

Claims

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Application Information

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IPC IPC(8): G01S1/02G01S5/02G01S5/14
Inventor 张晓林陈灿辉霍航宇
Owner BEIHANG UNIV
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