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[1] “RNAV,”

No.5-017 19 6 727 6 17

[2] International Civil Aviation Organiza-tion. “Global Navigation Satelli te Sys-tem Manual (Doc9849),” 2013.

[3] , “GNSS ,”

GPS/GNSS , 2016. [4] T. Aso, “Assessment of the Ground

Monitoring for Onboard ABAS Perfor-mance,” KGS Conference, 2016.

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[1] A. Saito, S. Fukao, and S. Miyazaki, “Highresolution mapping of TEC perturbations with

the GSI GPS network over Japan,” Geophys.Res. Lett., 25, pp.3079-3082, 1998.

[2] S. Saito, T. Yoshihara, and M. Yamamoto,“Real time ionospheric disturbance analysisand monitoring with GEONET real time data,”Proc. ION ITM 2014, pp.720-724, 2014

[3] G. K. Seemala, M. Yamamoto, A. Saito, and C.-H. Chen, “Three-dimensional GPS ionospherictomography over Japan using constrained leastsquares,” J. Geophys., Res., 119, pp.3044-3052,doi:10.1002/2013JA019582, 2014.

[4] C.-H. Chen, A. Saito, M. Yamamoto, S. Suzuki,and G. K. Seemala, “Medium-scale travelingionospheric disturbances by three-dimensional ionospheric GPS tomography,” Earth Planets and Space, 68:32, doi i0.1186/s40623-016-0412-6, 2016.

[5] S. Saito, S. Suzuki, M. Yamamoto, C.-H. Chen,and A. Saito, “Real-time ionospheremonitoring by three- dimensional tomographyover Japan,” Proc. ION GNSS+ 2016, pp.706-713, 2016.

[6] S. Saito, S. Suzuki, M. Yamamoto, C.-H. Chen,and A. Saito, “Real-time ionospheremonitoring by three- dimensional tomographyover Japan,” Journal of Institute of Navigation,pp.495-504, 2017.

[7] G. Ma, and T. Maruyama, “Derivation of TECand estimation of instrumental biases fromGEONET in Japan,” Annales Geophysicae, 21,pp.2083-2093, 2003.

[8] S. Saito, M. Yamamoto, C.-H. Chen, and A.Saito, “Ionosphere Monitoring and GNSSCorrection by a Real-time IonosphericTomography System in Japan,” Proc. IONGNSS+ 2017, pp.3434-3440, 2017.


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