A Decentralized Scheme to Generate High Resolution Ionospheric Map in Real-Time

K.H. Choi, H.S. Kim, J.Y. Lee, J.H. Lim, H.K. Lee

Abstract:	A novel decentralized scheme is proposed to generate the ionospheric delay information over a large regional area in real-time with high resolution. The regional ionospheric delay information is reconstructed in the form of a TEC (Total Electron Contents) map. For the implementation of the proposed scheme, only networked CORSs (Continuously Operating Reference Stations) providing basic GPS measurements are required. In the proposed decentralized scheme, DCB (Differential Code Bias) and TECs are estimated simultaneously for each CORS by a Kalman filter. As a result, dense TEC estimates are generated in real-time with high temporal resolution without the restriction on the number of participating reference stations. To evaluate the feasibility of the proposed method, three experiments were performed. The first set of experiments focus on the accuracy in discriminating SDCBs (Satellite DCB) and RDCBs (Receiver DCBs) from CDCB (Combined receiver and satellite DCB) observables. The second set of experiments focus on the accuracy in discriminating TECs and DCBs based on basic GPS (Global Positioning System) measurements from a single reference station. The third set of experiments focus on the computational burden and spatial resolution of ionospheric map generation.
Published in:	Proceedings of the ION 2013 Pacific PNT Meeting April 23 - 25, 2013 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	1061 - 1066
Cite this article:	Choi, K.H., Kim, H.S., Lee, J.Y., Lim, J.H., Lee, H.K., "A Decentralized Scheme to Generate High Resolution Ionospheric Map in Real-Time," Proceedings of the ION 2013 Pacific PNT Meeting, Honolulu, Hawaii, April 2013, pp. 1061-1066.
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