Testing Bernese Precise Point Positioning Over a Five Year Period

In this presentation we investigate the use of the precise point positioning (PPP) technique within the Bernese GPS software version 5.0. Although this method has normally been associated with the GIPSY OASIS software developed at the Jet Propulsion Laboratory (JPL), the Bernese GPS software is also able to carry out undifferenced analysis of GPS measurements. In previous studies, the PPP capability in Bernese has, however, only been used for evaluations of IGS rapid and final products over days or weeks. To the knowledge of the authors, no results using, e.g. several years of CGPS data, have been published. In recent years, the PPP technique has gained in popularity, partly responsible for this are the continuous improvements in the satellite orbits and clocks, and the related Earth rotation parameters produced and made available by the IGS community. The Bernese PPP processing strategy presented is still in development, but is in principle similar to the strategy applied when using GIPSY OASIS II, in terms of computing a set of transformation parameters from a global network of stations that are then applied during post-processing. We discuss results obtained for the global IGb00 network and a dense network over Europe using both IGS final and rapid products. A comparison with PPP coordinate time series from GIPSY OASIS II is also included.