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

Jidong Huang, Frank van Graas, and Curtis Cohenour

Peer Reviewed

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 approximately 12 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. Approximately 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 deg elevation angle. As expected, good correlation was found between large TSDEs and severe weather conditions.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 55, Number 1
Pages:	39 - 53
Cite this article:	Huang, Jidong, van Graas, Frank, Cohenour, Curtis, "Characterization of Tropospheric Spatial Decorrelation Errors Over a 5-km Baseline", NAVIGATION: Journal of The Institute of Navigation, Vol. 55, No. 1, Spring 2008, pp. 39-53.
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