Simulation Study of Low Latitude Ionospheric Effects on SBAS with a Three-dimensional Ionospheric Delay Model

Susumu Saito, T. Sakai, and Pierre Louve

Abstract:	A framework of simulation studies of ionospheric anomaly effects for SBAS was developed based on a three-dimensional ionospheric delay model in which plasma bubble effects were taken into account.The simulation framework was evaluated in terms of the spatial ionospheric threat model. For the MTSAT satellite-based augmentation system (MSAS) configuration,the reproduced ionospheric spatial threat model for moderate solar activity was in reasonable agreement with the current MSAS model, while larger threat space was reproduced for higher solar activity. The simulation framework was applied to a virtual SBAS at the equator. Spatial variability in ionospheric delay associated with the equatorial anomaly dominated in the simulated spatial threat models, and plasma bubble effects were seemingly small. This could be because the scale size of the plasma bubble was too small and the sampling in time and space in the simulations were not enough. Further simulations are necessary with higher sampling rate, different plasma bubble parameters, and more number of simultaneously existing plasma bubbles.This simulation framework was shown to be useful for evaluating ionospheric impacts on SBAS in arbitrary locations with arbitrary SBAS ground reference station configurations, especially in low magnetic latitude to equatorial regions.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	2526 - 2531
Cite this article:	Saito, Susumu, Sakai, T., Louve, Pierre, "Simulation Study of Low Latitude Ionospheric Effects on SBAS with a Three-dimensional Ionospheric Delay Model," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 2526-2531.
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