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New Characteristics of Geometric Dilution of Precision (GDOP) for Multi-GNSS Constellations

Published online by Cambridge University Press:  15 July 2014

Yunlong Teng  and
Jinling Wang
Yunlong Teng*
Affiliation:
(School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, 611731, PR China)
Jinling Wang
Affiliation:
(School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia)
*
(E-mail: ylteng@uestc.edu.cn)
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Abstract

For multi-Global Navigation Satellite System (GNSS) constellations, the Geometric Dilution of Precision (GDOP) is an important parameter utilised for the selection of satellites. This paper has derived new formulae to describe the change of GDOP. The result shows that, for GNSS single point positioning solutions, if one more satellite belonging to the existing tracked multi-GNSS constellation used in the single point positioning solution is added, the GDOP always decreases with the number of the added satellites. On the other hand, when the constellation of the added satellite is not from the tracked existing constellations, the different numbers of the added satellites have different influences on the change of GDOP. Generally, adding one satellite from another constellation into the existing multi-GNSS constellations will increase the GDOP, but adding two satellites will decrease the GDOP compared with adding one from another constellation. Additionally, the GDOP also increases in the cases of adding two satellites from two different constellations into the tracked existing constellations.

Keywords

Satellite NavigationGNSSConstellationDilution of Precision
Type
Research Article
Information
The Journal of Navigation , Volume 67 , Issue 6 , November 2014 , pp. 1018 - 1028
Copyright
Copyright © The Royal Institute of Navigation 2014 

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