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Rapid visible satellite selection method based on multimode GNSS receiver

A fast selection and receiver technology, applied in the field of satellite navigation, can solve the problems of difficult multi-mode GNSS receiver positioning, complex calculation, and low accuracy

Inactive Publication Date: 2014-07-30
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0006] So far, the visible satellite selection methods of multi-mode GNSS receivers mainly use empirical methods or approximate methods to design satellite selection methods. There is no strict mathematical theory derivation basis, and there are deficiencies such as low accuracy and complex calculations, which are difficult to fully apply to multi-mode GNSS Receiver Positioning Requirements

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  • Rapid visible satellite selection method based on multimode GNSS receiver
  • Rapid visible satellite selection method based on multimode GNSS receiver
  • Rapid visible satellite selection method based on multimode GNSS receiver

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] Such as figure 1As shown, the method for quickly selecting visible satellites based on the multi-mode GNSS receiver of the present invention is as follows: firstly, by eliminating the visible satellites whose elevation angle is less than 10 degrees, the available visible satellite set is obtained; then, for the visible satellite set obtained above, Calculate the coefficient matrix and weight coefficient matrix according to the satellite position of the satellite and the approximate position information of the receiver, thereby calculating the GDOP value; then, calculate the contribution value of each visible satellite to the GDOP value, and arrange the composition according to the contribution value from large to small ; Finally, select a number of satellites with a large contribution to the GDOP value, that is, the visible sat...

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Abstract

The invention discloses a rapid visible satellite selection method based on a multimode GNSS receiver. The method comprises the steps that (1) elevation angles, received by the multimode GNSS receiver currently, of all visible satellites are calculated, the satellites with the satellite elevation angles smaller than 10 degrees are eliminated, and a usable visible satellite set S is obtained; (2) according to satellite position information of the satellites and receiver preliminary position information, a coefficient matrix and a weight coefficient matrix are calculated; (3) a GDOP value corresponding to the visible satellite set S is calculated; (4) a contribution value delta Gi of each visible satellite to GDOP is calculated and the contribution values delta Gi are ranked from large to small, so that a set SG is formed; (5) when the multimode GNSS receiver needs to select N visible satellites for navigation and location, the front N satellites in the set SG are selected, and a corresponding visible satellite subset is a selected usable satellite constellation. The method has the advantages of being convenient and quick to operate, simple in implementation, high in accuracy, wide in application range and the like.

Description

technical field [0001] The invention mainly relates to the field of satellite navigation, in particular to a method for quickly selecting visible satellites based on a multi-mode GNSS receiver. Background technique [0002] With the vigorous development of GNSS (Global Navigation Satellite System) industry, countries are paying more and more attention to GNSS. At present, GNSS mainly includes GPS, GLONASS, Galileo under construction in the European Union and China's Beidou Navigation Satellite System BDS (BeiDou Navigation Satellite System, also known as Compass). The development of the GNSS industry is concentrated in the large-scale use of GNSS receivers for navigation and positioning applications in all walks of life, including sea, land, air and space. [0003] The United States is implementing the GPS modernization plan; Russia is undergoing technological innovation and increasing satellites in orbit in order to restore and improve GLONASS's navigation and positioning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/28
CPCG01S19/28G01S19/33
Inventor 何晓峰唐康华李涛胡小平罗兵练军想吴文启王安成范晨冯春妮
Owner NAT UNIV OF DEFENSE TECH
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