Highlights The TID amplitude is determined by relative increment of critical frequency. The TID spatial scale is determined by the shape of the cusp. The TID horizontal drift velocity is determined by the rate of the cusp descent.
Abstract This paper presents a case study when due to the descending additional U-shaped trace on vertical incidence ionograms, increased critical frequency stabilizes. This corresponds to an ionospheric disturbance that moves toward the ionosonde and then stays overhead. Within a 2D model, traveling ionospheric disturbances (TIDs) are superimposed on the inverted background ionosphere. So ray tracing is used to obtain propagation paths through non-stratified ionosphere thus synthesizing the disturbed ionogram traces. Investigated are changes in the cusp shape caused by varying TID parameters. A cusp-fitting method to determine the TID amplitude, spatial scale, and horizontal drift velocity are shown.
Studying characteristics of traveling ionospheric disturbances using U-shaped traces on vertical incidence ionograms
Advances in Space Research ; 67 , 3 ; 1085-1089
2020-11-07
5 pages
Article (Journal)
Electronic Resource
English
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