Characterization of Tropospheric Spatial Decorrelation Errors Over a 5-km Short Baseline

Jidong Huang, Curtis Cohenour and Frank van Graas

Abstract:	A new DGPS data collection system is specifically designed to characterize the tropospheric spatial decorrelation error (TSDE) over a 5-km baseline near Athens, OH. In this setup, multipath-limiting antennas (MLA) are used at both locations to limit the multipath errors in both the pseudorange (PR) and carrier phase (CP) measurements. The new antenna configuration combined with ionospheric corrections is able to reduce the TSDE processing error to a maximum of approx. 9 cm. Weather instruments are set up for collecting and comparing meteorological data at the two receiver sites. Using this new configuration, continuous GPS and meteorological data are collected from the two sites. Approx. 80 days of GPS data collected at the two receiver sites during the summer of 2006 were processed. For this baseline of 5-km near Athens, OH, TSDEs up to 0.41 m were observed. The largest TSDE observed was on a satellite (SV) with a 5-degree elevation angle. As expected, good correlation was found between large TSDEs and severe weather conditions.
Published in:	Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007) April 23 - 25, 2007 Royal Sonesta Hotel Cambridge, MA
Pages:	397 - 412
Cite this article:	Huang, Jidong, Cohenour, Curtis, van Graas, Frank, "Characterization of Tropospheric Spatial Decorrelation Errors Over a 5-km Short Baseline," Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007), Cambridge, MA, April 2007, pp. 397-412.
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