The Atmospheric Influence on the Results from the Swedish Permanent Network

C.F. Darin, G. Elgered, T.R. Emardson, L.P. Gradinarsky, P.O.J. Jarlemark and J.M. Johansson

Abstract:	The Swedish GPS network has been in continuous operation since August 1993. The network consists of 21 stations and covers a region from latitude 55 to 69 degrees north . One major application is the measurement of crustal motions, for example, those associated with the postglacial isostatic adjustment. In the daily data analysis the total propagation delay due to the atmosphere is obtained. From these data we determine the Integrated Perceptible Water Vapor (IPWV)and the ionospheric Total Electron Content (TEC). This database, obtained from dual-frequency GPS measurements, now contains data from more than 4 years. We use this extensive data set to study the time and space variability of IPWV and TEC of the area and compare to results obtained from othertechniques. At the Onsala Space Observatory a microwave radiometer has been operated more or less continuously side-by-side with the GPS receiver. Comparisons between the GPS estimates and the results inferred from the radiometer show agreements of the order of 1 mm in IPWV.. We evaluate the capability of ground-based GPS networks to accurately monitor atmospheric water vapor and the ionospheric electron content. We have started to investigate the possibility to use the Swedish permanent GPS network in future real-time or near real-time carrier phase-based applications such as Real-Time Kinematic (RTK) GPS observations and weather predictions.
Published in:	Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998) June 1 - 3, 1998 The Adams Mark Hotel Denver, CO
Pages:	349 - 353
Cite this article:	Darin, C.F., Elgered, G., Emardson, T.R., Gradinarsky, L.P., Jarlemark, P.O.J., Johansson, J.M., "The Atmospheric Influence on the Results from the Swedish Permanent Network," Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998), Denver, CO, June 1998, pp. 349-353.
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