Comparison Of Availability Of Galileo, Gps And A Combined Galileo/Gps Navigation Systems

Wang, Jiexian; Keller, Wolfgang; Sharifi, Mohammad

doi:10.2478/v10018-007-0001-9

Abstract

Galileo satellites have been planned to be launched in 2006 by the European Union. Launching these satellites will double the number of positioning satellites currently accessible to users. As a consequence, accuracy and reliability will be improved dramatically. Besides accuracy and reliability, availability is also used for quantification of a Global Navigation Satellite System performance. This paper briefly describes the constellation of space segment of the proposed Galileo navigation system in comparison with the well-known Global Positioning System (GPS). Availability of GPS, Galileo and Galileo/GPS satellites are then formulated in terms of Satellite Appearance Distribution Function (SADF). Achievable accuracy in horizonal and vertical positions and timing are expressed using the respective Dilution of Precisions based on the derived mathematical formulation.

References

Geiger A. (1988). Simulating disturbances in GPS by continuous satellite distribution, Journal of Surveying Engineering, 114, 182-194.10.1061/(ASCE)0733-9453(1988)114:4(182)
Search in Google Scholar
Keller W. (2001). Geodetic coordinate systems, Lecture notes, Department of geodesy and geoInformatics, University of Stuttgart.
Search in Google Scholar
Krakiwsky E. J., D. B. Thomson (1974) Geodetic position computations, Lecture notes, No. 39, Department of geodesy and geomatics engineering, University of New Brunswick, Fredericton.
Search in Google Scholar
McCarthy D. (1996). IERS conventions (1996), IERS technical notes No. 21, International Earth Rotation Service.
Search in Google Scholar
Meng X., C. Noakes, A. H. Dodson and G. W. Roberts (2003). GPS satellite geometry and its implications for structural deformation monitoring, ION 2003 proceedings, 9-12.
Search in Google Scholar
O'Keefe K., S. G. Ryan and G. Lachapelle (2002). Global availability and reliability assessment of the GPS and Galileo global navigation satellite systems, Canadian Aeronautics and Space J., 48, 123-132.
Search in Google Scholar
Santerre R. (1991). Impact of GPS satellite sky distribution, manuscripta geodetica, 16, 28-53.
Search in Google Scholar
Seeber G. (2003). Satellite Geodesy: Foundations, Methods & Applications, Walter de Gruyter, Berlin.10.1515/9783110200089
Search in Google Scholar
U.S. Department of Transportation and U. S. Department of Defense (2001). Federal Radionavigation Systems, Final Report, DOT/VNTSC/RSPA/01-3.1/DoD-4650.5.
Search in Google Scholar
Wang J., H. I. Bki and L. Caiping (2002). Dependency of GPS positioning precision on station location, GPS Solutions, 6, 91-95.10.1007/s10291-002-0021-7
Search in Google Scholar
Wells D. (1994). Functional analysis applied to least squares in geomatics, Lecture notes, Department of geodesy and geomatics engineering, University of New Brunswick, Fredericton.
Search in Google Scholar
Wolfrum J., and H. Trautenberg (2000). Galileo - a technical concept for the European satellite navigation system, Int. J. Satell. Commun., 18, 243-258.
Search in Google Scholar
Yarlagadda R., I. Ali, N. Al-Dhahir and J. Hershey (2000). GPS GDOP metric, IEE Proceedings on Radar, Sonar, and Navigation, 259-264.10.1049/ip-rsn:20000554
Search in Google Scholar

Comparison Of Availability Of Galileo, Gps And A Combined Galileo/Gps Navigation Systems

Abstract

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