The IGEX-98- campaign: Highlights and perspective

Starting in October 1998, a large international campaign of GLONASS observations, called IGEX-98, has been conducted during a 6 month period. This campaign has involved a large international cooperation worldwide, including GLONASS, GPS and Laser observations and data processing. The goal of this paper is to present the scientific goals of the IGEX-98 campaign, to describe briefly its organization and also to present the preliminary results obtained for precise orbit determination, terrestrial reference frame and timing issues.