[P-EM17] [EE] Recent Advances in Ionosphere Observation and Modeling for Monitoring and Forecast

[PEM17-P01] Observations of medium scale traveling ionospheric disturbances (MSTIDs) using the ground-based GNSS networks around Taiwan

*Charles Lin¹、Chia-Hung Chen¹、Yu-Ting Chou¹、Jia-Ting Lin¹、P. K. Rajesh¹ (1.Department of Earth Science, National Cheng Kung University)

キーワード：ionosphere, GNSS observations, Medium scale travel ionospheric disturbances

Using a network of ground-based GNSS receivers, medium-scale travelling ionospheric disturbances (MSTIDs) at the low-latitude equatorial ionization anomaly region is studied during 2013-2015. An algorithm using two-dimensional fast Fourier transform is developed to automatically identify the appearance of MSTIDs. Results show that the northward propagation of MSTID is predominated in daytime hours during April-July and in nighttime during March-August. On the other hand, southward MSTIDs are dominated in January-February and November-December in both daytime and nighttime. The statistical analysis of northward and southward propagations of MSTIDs at low-latitude reported here will be useful to understand its underlying physics.