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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Statistical study of medium-scale traveling ionospheric disturbances in low-latitude ionosphere using an automatic algorithm

Fig. 3

Local time and seasonal variations of the MSTID obtained from 3D-FFT and SVM analysis over Taiwan during 2013–2015. It is divided into 10 days and half an hour per grid for calculating the occurrence rate of southward MSTIDs in a 2013, b 2014, c 2015 year and northward MSTIDs in d 2013, e 2014, f 2015 year. The propagation direction of MSTIDs is compared to the dusk terminator (black line) in g 2013, h 2014, i 2015 year

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