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Quick satellite selection method for combined satellite navigation system

A satellite navigation system and fast technology, applied in the field of satellite navigation, can solve problems such as difficult calculation of volume, slow speed of star selection, and difficulty in realization, and achieve the effect of less positioning accuracy, fast star selection, and large amount of calculation

Inactive Publication Date: 2008-03-26
BEIHANG UNIV
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Problems solved by technology

Due to the large number of satellites involved in the maximum volume method, the volume is difficult to calculate and the calculation amount is also large, and the speed of star selection is very slow. It can be seen that it is difficult to realize the traditional satellite selection method for combined system satellite selection.

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  • Quick satellite selection method for combined satellite navigation system
  • Quick satellite selection method for combined satellite navigation system
  • Quick satellite selection method for combined satellite navigation system

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Embodiment Construction

[0026] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0027] The present invention provides a fast satellite selection method for an integrated satellite navigation system. The process of the method is shown in Fig. 1, and is specifically implemented by the following steps:

[0028] Step 1: Determine the number m of required positioning satellites according to the positioning accuracy requirements of the integrated satellite navigation system. Firstly, all satellites in the selected system are numbered, and the numbers of visible stars in the system satellites are obtained, and each visible star is distinguished according to its own number. Suppose the total number of visible stars in the combined system at this time is K. Under the condition that the ranging error is determined, the GDOP value reflects the size of the positioning accuracy, that is, the smaller the GDOP value, the higher the positioning ac...

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Abstract

This invention provides a quick satellites choosing method for together fitted satellites system. It chooses satellites indirectly in this way: first, confirm the number of satellites in need. Then calculate the quadrant elevation and azimuth angle of visible satellites, set them to different parts and choose a group of satellites which has a medium quadrant elevation. Disposal the azimuth angle of the choosing satellites, combine the quadrant elevation information to remove some improper satellites. This satellite choosing method is quick, convenience and needs less calculation than the traditional one. Even it is not as precise as before, but it makes the navigational computer working more easily and guarantee the precision of together fitted navigation.

Description

Technical field [0001] The invention belongs to the field of satellite navigation, and specifically relates to a satellite selection method of an integrated satellite navigation system. Background technique [0002] With the implementation of the Central European Galileo Plan, satellite navigation will change from the GPS era to the GNSS (Global Satellite Navigation System) era. Because GNSS has the advantages of high accuracy, global coverage, and all-weather, it forms GPS, GALILEO and other systems (such as GLONASS, BD). In the situation where multiple systems coexist, the combined navigation of multiple satellite navigation systems will become an inevitable trend. When multi-satellite navigation system integrated navigation, the number of visible stars has increased greatly, positioning accuracy and system reliability have been greatly improved, but the calculation amount of navigation and positioning has also doubled, and the processing of user receivers in engineering The sp...

Claims

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Application Information

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IPC IPC(8): G01S1/02G01S5/02G01S5/14
Inventor 李锐金玲黄智刚张军赵昀马颖莉
Owner BEIHANG UNIV
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