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Satellite selection method and satellite navigation positioning method applying the satellite selection method

A satellite navigation and positioning method technology, applied in the field of satellite navigation and positioning, can solve the problems of long time consumption, slow satellite navigation and positioning, and inability to meet fast satellite navigation and positioning, so as to improve selection efficiency, low calculation amount, fast and high Effect of Precision Horizontal Positioning

Inactive Publication Date: 2013-10-23
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Due to the long time spent in the star selection process, the satellite navigation and positioning are slow, which cannot meet the requirements of fast satellite navigation and positioning

Method used

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  • Satellite selection method and satellite navigation positioning method applying the satellite selection method
  • Satellite selection method and satellite navigation positioning method applying the satellite selection method
  • Satellite selection method and satellite navigation positioning method applying the satellite selection method

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Embodiment Construction

[0015] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments and with reference to the accompanying drawings.

[0016] It should be noted that in the drawings or description of the specification, similar or identical parts use the same drawing numbers. In addition, in the drawings, the shape or thickness of the embodiments can be enlarged, and are simplified or marked for convenience. Furthermore, elements or implementations that are not shown or described in the drawings are in the form known to those of ordinary skill in the art. In addition, although this article may provide an example of a parameter containing a specific value, it should be understood that the parameter does not need to be exactly equal to the corresponding value, but can be approximated to the corresponding value within acceptable error tolerances or design...

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Abstract

The invention discloses a satellite selection method and a satellite navigation positioning method applying the satellite selection method. The satellite selection method comprises: calculating the elevation angles and azimuth angles of searched visible satellites; sequencing the visible satellites in an increase order in terms of the elevation angle and selecting at least five top invisible satellites as candidate satellites; obtaining, from the selected candidate satellites, all the combinations by taking three satellites as a group; and selecting the group with the highest uniformity in terms of azimuth angle sequencing from all the combinations as the three satellites for the use for satellite navigation positioning. The satellite selection method provided by the invention has a smaller calculation amount than that of a GDOP-based satellite selection method so that the fast satellite navigation positioning is realized.

Description

Technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a satellite selection method and a satellite navigation and positioning method using the satellite selection method. Background technique [0002] In the satellite navigation and positioning system, the estimation accuracy of the user terminal position depends on the geometric distribution of the measurement and the pseudorange measurement error. The Dilution of Precision (DOP) provides a simple description of the user terminal-satellite geometric distribution. The larger the DOP, the more dispersed the position estimation error. [0003] Considering the number of receiving channels and real-time signal processing capabilities, especially the navigation modules built in mobile phones, automobiles and spacecraft, it is necessary to select four satellites with the best geometric distribution from all visible satellites to quickly obtain the best positioning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/28G01S19/38
Inventor 季海福马利华艾国祥
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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