2003/2004 Analysis Coordinator Report Gerd Gendt and Thomas Nischan GeoForschungsZentrum Potsdam (GFZ), Department Geodesy & Remote Sensing, Telegrafenberg A17, D-14473 Potsdam, Germany, E-Mail:
[email protected] 1 Introduction Similar to the years before this report completes the report 'Analysis Activities' published in the IGS Annual Report 2003/2004 (Gendt, 2005). A summary of the most important changes during 2003/2004 will be presented and the status of the product quality will be given. Many figures summarizing combination statistics on orbits, clocks and Earth Rotation Parameters (ERP) are shown, where most of the plots can be retrieved from the IGS Analysis Coordinator web-page at http://gfz-potsdam.de/igsacc. The IGS Workshop and Symposium held in March 2004 in Bern (Meindl, 2004) passed a series of recommendations, which strived to consolidate and improve the quality of the IGS products. Among them was also the quality monitoring of the Precise Point Positioning (PPP) realization of the ITRF using the IGS Final and Rapid products, which demanded for larger additional activities in the combination process (see Section 7). 2 IGS products – Overview The International GNSS Service is committed to provide the highest quality GPS&GLONASS observation data and products as the standard for global navigation satellite systems (GNSS) in support of scientific activities such as improving and extending the International Terrestrial Reference Frame, monitoring deformations of the solid Earth, variations in the liquid Earth (sea level,