On the Specific Aspects of Precise Tropospheric Path Delay Estimation in GPS Analysis

Abstract

The Zenith Total Delay (ZTD) parame- ters estimated in theGPS analyses are rather sensitive to the applied processing strategy. In this paper, we are focusing on the specific as- pects of the post-processed (PP) and near real-time (NRT) GPS ZTD monitoring. We are studying the sensitivity of estimated ZTD to the network design, to the ambiguity handling and to the use of Earth Ro- tation Parameters (ERP) for the orbit modelling. The results were obtained using the NRT and PP analyses at the Geodetic Observa- tory Pecn´ y (GOP) in the frame of COST– 716 action (the European Co-operation in the Field of Scientific and Technical Research, http://www.oso.chalmers.se/geo/cost716.html). Keywords.