Controlled Antenna Changes at GNSS Reference Stations

L. Wanninger, V. Frevert, M. Fettke

Abstract:	Antenna changes at GNSS reference stations frequently produce discontinuities in their coordinate time series, especially in the height component. These coordinate shifts are mainly caused by changes of carrier-phase multipath effects and also, but usually to a smaller extend, by errors in the antenna phase center corrections. A monitoring method was developed and successfully tested, which requires additional GNSS observations from a local, temporary reference station. Changes of carrier-phase measurement errors due to the antenna exchange are determined and stored in L1 and L2 phase maps. The paper deals with the application of this new technique to 13 recent antenna changes in a network of permanently operating reference stations. Based on the modeling results we are able to present a detailed analysis of the effects of the antenna surroundings on discontinuities of station coordinate time series.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	649 - 657
Cite this article:	Wanninger, L., Frevert, V., Fettke, M., "Controlled Antenna Changes at GNSS Reference Stations," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 649-657.
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