The IGS Analysis Products and the Consistency of the Combined Solutions

The basic IGS analysis products (orbits, Earth orientation parameters, station coordinates, and clocks) are of very high quality, and should in general be more reliable and at least as accurate (if not more so) than the solutions obtained by the individual analysis centers (ACs). This position paper focuses on the current combination procedures, reporting and feedback. Possible enhancements in precision, consistency, robustness, presentation and feedback of the results are discussed. Furthermore, it addresses a need for additional products in order to meet the needs of IGS users.