Galileo Orbit and Clock Quality of the IGS Multi-GNSS Experiment

DOI
Publisher DOI
Abstract
The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) aims at the data collection and analysis of all available satellite navigation systems. In particular the new global and regional satellite navigation systems are of interest, i.e., the European Galileo, the Chinese BeiDou, the Japanese QZSS as well as satellite based augmentation systems. This article analyzes the orbit and clock quality of the Galileo products of four MGEX analysis centers for a common time period of 20 weeks. Orbit comparisons of the individual analysis centers have a consistency at the 5–30 cm level. Day boundary discontinuities range from 4 to 28 cm whereas 2-day orbit fit RMS values vary between 1 and 7 cm. The accuracy evaluated by satellite laser ranging residuals is on the one decimeter level with a systematic bias of about −5 cm for all analysis centers. In addition, systematic errors on the decimeter level related to solar radiation pressure mismodeling are present in all orbit products. Due to the correlation of radial orbit errors with the clock parameters, these errors are also visible as a bump in the Allan deviation of the Galileo satellite clocks at the orbital frequency.
Date Issued
2015-01
Publication Type
Article
Subject(s)
Language(s)
en
Author(s)
Steigenberger, Peter
Loyer, Sylvain
Perosanz, Felix
Uhlemann, Maik
Gendt, Gerd
Montenbruck, Oliver
Additional Credits
Journal
Advances in space research
Publisher
Pergamon
ISSN
0273-1177
Access(Rights)
restricted
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