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Computation of precise GLONASS orbits for IGEX-98

  • M. Rothacher
  • T. Springer
  • G. Beutler
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 121)

Abstract

On October 19, 1998, at the beginning of the International GLONASS Experiment (IGEX-98), the Center for Orbit Determination in Europe (CODE) has started to compute precise orbits for all active GLONASS satellites. The campaign was initially scheduled for three months, but the activities still continue in September, 1999. One of the main reasons for this extension was the launch of three new GLONASS satellites at the end of the year 1998.

The processing of the ILEX network is done on a routine basis at CODE and precise eghemerides are made available through the global ILEX Data Centers. The improved GLONASS orbits are referred to the Interna, tional terrestrial Reference System (ITRF96) and to GPS system time. They are therefore fully compatible with GPS orbits and allow a combined processing of both satellite systems.

All GLONASS satellites are equipped with a laser reflector array and the SLR ground network is tracking most of the GLONASS satellites. Comparisons of the GLONASS orbits computed by CODE with the SLR measurements show that the orbit accuracy is better than 20 cm.

Keywords

GLONASS IGEX-98 orbit determination system time difference 

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References

  1. BIPM, (1999). Bureau International des Poids et Mesures, Sevres, France.http://www.bipm.fr/emus/5_Scientific.Google Scholar
  2. CDDIS, (1999). Crustal Dynamics Data Information System, Greenbelt, USA.http://cddisa.gsfc.nasa.gov/glonass_datasum.html Google Scholar
  3. Habrich, H. (1999). Geodetic Applications of the Global Navigation Satellite System (GLONASS)Ph. D. thesis Astronomical Institute University of Berne, In preparation.Google Scholar
  4. Noll, C. (1998). IGEX98 Data Center Information. http://lareg. ensg. ign. fr/IGEX/ix_datac.html.Google Scholar
  5. Rothacher, M., and L. Mervart (1996). Bernese GPS Software, Version 4.0. Printing Office of the University of Berne Google Scholar
  6. Springer, T., G. Beutler, M. Rothacher (1999). Improving the Orbit Estimates of GPS Satellites. Journal of Geodesy, Vol. 73, pp. 147–157.CrossRefGoogle Scholar
  7. Willis, P., G. Beutler, W. Gurtnerr, G. Heirs, R. Neilan, J. Slater (1998). The International Glonass Experiment IGEX-98. http://lareg. ensg.ign. fr/IGEX/goals.html.Google Scholar

Copyright information

© SPringer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • M. Rothacher
  • T. Springer
  • G. Beutler
    • 1
  1. 1.Astronomical InstituteUniversity of BerneBernSwitzerland

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