The 2D features of tropical cyclone Usagi's effects on the ionospheric total electron content

The effects of the tropical cyclone Usagi on ionospheric total electron content (TEC) during September 16-24, 2013 are investigated based on the high spatial and temporal resolution TEC data. The Spectral Whitening Method (SWM), a new method to identify aperiodic disturbances, is applied to process the TEC map to ionospheric disturbances map. It is found that the ionosphere is most disturbed along the track of tropical cyclones (TC), and could change its behavior while the typhoon approaching the continent (as well as big island). It is the first result about the 2D features of the ionospheric responses to a tropical cyclone using SWM derived index Js.