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

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.

Increasing number of observation opportunities in the Earth's ionosphere and upper atmosphere advances the research of the ionospheric weather in the recent two decades.  In the ground segment, global deployment of ground-based GNSS receivers and newly installed/planned radars and airglow imagers greatly extend the observation coverage.  In the space segment, the Swarm mission and the upcoming missions that are scheduled for launch in 2017, including NASA-ICON, NASA-GOLD and FORMOSAT-7/COSMIC-2, provide a variety of observation worldwide.  With the large amount and diversity of datasets, sophisticated theoretical and empirical models can be validated, and implemented or inclusion of newly discovered thermospheric and ionospheric structures.  Additionally, advances in application of data assimilation technique on the ionospheric forecast model have also been made.  These recent advances in observations and models are important to move forward the status of the ionospheric space weather forecast.  It is the purpose of this session to solicit studies providing observations as well as theoretical, empirical and data assimilation modeling on the multiple scales of ionosphere plasma structures, from global morphology to irregularities and traveling ionospheric disturbances.  Studies on both magnetically quiescent and disturbed conditions will also be addressed. 

JpGU-AGU Joint Meeting 2017

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

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