AURORAL ZONE IONOSPHERIC CONSIDERATIONS FOR WADGPS

Susan Skone and M. Elizabeth Cannon

Peer Reviewed

Abstract:	Dual-frequency GPS receivers enable the estimation of absolute ionospheric delay and total electron content (TEC) along the signal path. By using a number of reference stations, each equipped with a dual-frequency receiver, it is possible to estimate values of the vertical ionospheric delay at a set of designated grid points. This type of ionosphere delay modeling is employed in Wide Area Differential GPS (WADGPS) networks, where grid accuracies generally depend on the temporallspatial correlations of TEC. These models can suffer degraded performance in regions, such as the high-latitude aurora1 zone, where spatial gradients and temporal variations of electron density may differ significantly from assumptions. In this paper, TEC variations in the aurora1 zone are investigated during periods of enhanced ionospheric activity. Accuracies of corresponding wide area ionospheric grid corrections are also investigated for various grid spacings.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 45, Number 2
Pages:	117 - 128
Cite this article:	Skone, Susan, Cannon, M. Elizabeth, "AURORAL ZONE IONOSPHERIC CONSIDERATIONS FOR WADGPS", NAVIGATION: Journal of The Institute of Navigation, Vol. 45, No. 2, Summer 1998, pp. 117-128.
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