The International GLONASS Experiment (IGEX-98): Organization, Preliminary Results and Future Plans

James A. Slater, Pascal Willis, Gerhard Beutler, Werner Gurtner, Wlodzimierz Lewandowski, Carey Noll, Robert Weber, Ruth E. Neilan, Guenter Hein

Abstract:	When considering future global navigation satellite systems, the interoperability and seamless use of several constellations is an important aspect. The International GLONASS Experiment (IGEX-98) was organized to address these interoperability issues between GLONASS and GPS. From October 1998 to April 1999, approximately 60 stations in over 25 countries collected GLONASS tracking data in the first global campaign organized to investigate GLONASS. The experiment was made possible through the voluntary cooperation of dozens of organizations that tracked the satellites, supplied equipment, archived and distributed data, and produced the results described here. Observations were made continuously at each station, converted to RINEX format, and transmitted to one of two data centers in France and the United States. These data have been used by numerous organizations to determine precise GLONASS orbits, examine the relationship between the PZ-90 and WGS 84 terrestrial reference frames, compute station positions and GLONASS-GPS time offsets, perform time transfer, evaluate receiver performance, and develop and test new software. The paper summarizes the preliminary results of the campaign and notes the impacts of the experiment on the ability to use GLONASS for scientific and practical applications. Due to the success of the campaign, plans are underway for continuing the global data collection and analysis.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	2293 - 2302
Cite this article:	Slater, James A., Willis, Pascal, Beutler, Gerhard, Gurtner, Werner, Lewandowski, Wlodzimierz, Noll, Carey, Weber, Robert, Neilan, Ruth E., Hein, Guenter, "The International GLONASS Experiment (IGEX-98): Organization, Preliminary Results and Future Plans," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 2293-2302.
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