Fig. 7From: Statistical study of medium-scale traveling ionospheric disturbances in low-latitude ionosphere using an automatic algorithmComparison of occurrences of EsL observed by FORMOSAT-3/COSMIC and MSTIDs. a The occurrence rate of EsL detected by FORMOSAT-3/COSMIC RO over Taiwan and the conjugate region of Taiwan in nighttime during 2013–2015. b The propagation direction of MSTIDs over Taiwan in nighttime during 2013–2015. c The occurrence rate of southward MSTIDs over Taiwan in nighttime during 2013–2015. d The occurrence rate of northward MSTIDs over Taiwan in nighttime during 2013–2015. The black lines indicate the dusk terminatorBack to article page