Journal article

Precision analysis of troposphere sensing using GPS single-frequency signals

K Wang, A Khodabandeh, PJG Teunissen



Various studies have been performed to investigate the accuracy of troposphere zenith wet delays (ZWDs) determined from GPS. Most of these studies use dual-frequency GPS data of large-scale networks with long baselines to determine the absolute ZWDs. For small-scale networks the estimability of the absolute ZWDs deteriorates due to high correlation between the solutions of the ZWDs and satellite-specific parameters as satellite clocks. However, as relative ZWDs (rZWDs) can always be estimated, irrespective of the size of the network, it is of interest to understand how the large-scale network rZWD-performance of dual-frequency GPS using an ionosphere-float model compares to the small-scale n..

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University of Melbourne Researchers


Awarded by Australian Research Council (ARC) Federation Fellowship

Funding Acknowledgements

We would like to thank the IGS for providing the final orbit products, which were obtained through the online archives of the Crustal Dynamics Data Information System (CDDIS), NASA Goddard Space Flight Center, Greenbelt, MD, USA. We would also like to thank Geoscience Australia (GA) and RTKnetwest for providing the GNSS observation data, and Septentrio for providing the receiver at station UWAO as well as Dr. Sascha Schediwy from the University of Western Australia for hosting this station. Thanks are also given to Australian Bureau of Meteorology, Space Weather Services for putting the TEC map on the server. The station coordinates were processed via the online GPS processing Service AUSPOS provided by GA, and the rainfall data were collected from Bureau of Meteorology. In addition to that, we would also like to thank our colleagues in the GNSS Research Centre, Curtin University, for their development of the Curtin PPP-RTK Software. PJG Teunissen is recipient of an Australian Research Council (ARC) Federation Fellowship (project number FF0883188).