Abstract:
In this study, for the first time, planetary wave signatures in ionospheric Total Electron Content (TEC)
retrieved from global positioning service (GPS), mesospheric wind and temperature at low latitude
station has been identified during January–February 2009. Our investigations revealed that planetary
waves with 3–5 days periodicity characterized as ultrafast Kelvin (UFK) waves caused by stratospheric
warming event during January 2009. The UFK waves are observed to be propagated from lower
atmosphere to ionosphere. The UFK perturbations during SSW event are discussed in the light of current
understanding of role of non linear interaction of planetary waves to modulate low latitude ionosphere.
