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GPS-GLONASS-GALILEO: A Dynamical Comparison

Published online by Cambridge University Press:  22 December 2008

Stelian Cojocaru ,
Eugen Birsan ,
Ghiorghe Batrinca  and
Paulica Arsenie
Stelian Cojocaru*
Affiliation:
(Allied Maritime Component Command, HQNaples, Italy)
Eugen Birsan
Affiliation:
(Maritime University Constantza, Romania)
Ghiorghe Batrinca
Affiliation:
(Maritime University Constantza, Romania)
Paulica Arsenie
Affiliation:
(Maritime University Constantza, Romania)
*
(Email: cojocarus@yahoo.com)
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Abstract

The new millennium brought an asymptotic interest in space technology. Besides existing operational global positioning systems i.e. GPS and GLONASS, another two have already emerged: GALILEO and Compass/Beidou. Alternatives to GPS imposed the GNSS concept, which has crystallized in a short time. The true reasoning of this excessive need for positioning information is beyond the scope of this paper; instead, an analysis of orbital behaviour of GPS, GLONASS and GALILEO is conducted. GNSS orbits have similar characteristics permitting us to encompass them under the term Medium Earth Orbits (MEO). However, small differences between mean orbital elements of the three systems produce a significantly different reaction of their satellites' orbits to the natural perturbing factors. This study analyzes the three space segment characteristics, introduces the analytical method used to evaluate variations of orbital elements under the most significant perturbing influences and offers a broad comparative image of the dynamic behaviour of the three GNSS constellations.

Keywords

GNSSSpace segmentOrbital perturbations
Type
Research Article
Information
The Journal of Navigation , Volume 62 , Issue 1 , January 2009 , pp. 135 - 150
Copyright
Copyright © The Royal Institute of Navigation 2008

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References

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