TEC Extraction with Different Schemes to Model DCB Under Various Ionosphere Conditions

Yan Xiang, Yang Gao, Xingyu Chen, Hongzhou Yang

Peer Reviewed

Abstract:	Difference code biased (DCB) is one of the main errors when extracting total electron content (TEC) from the ionosphere observations. DCB is often assumed to be constant over time, e.g. over a period of two-hours or a day. Considering the variation of DCB during a day, the paper estimates and compare the ionosphere TEC estimates by modeling receiver DCB as a constant during a day and as a Gauss-Markov process under both quiet and disturbed ionospheric conditions. The results show that the DCB estimate can quickly converge to a relative stable value within five hours. Although the residuals under the disturbed ionosphere conditions are larger than under peace conditions, the DCB is little affected. The standard deviation of DCB estimates by modeling DCB as Gauss-Markov is smaller than that by modeling DCB as a constant.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	3608 - 3614
Cite this article:	Xiang, Yan, Gao, Yang, Chen, Xingyu, Yang, Hongzhou, "TEC Extraction with Different Schemes to Model DCB Under Various Ionosphere Conditions," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 3608-3614.
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