Simulation study of the modification of the high-latitude ionosphere by powerful high-frequency radio waves

摘要

A mathematical model of thehigh-latitude ionosphere, developed earlier in the Polar Geophysical Institute,is utilized to calculate three-dimensional distributions of ionosphericparameters, modified by the action of the ionospheric heater. The model takesinto account the convection of the ionospheric plasma, strong magnetization ofthe plasma at F-layer altitudes, and geomagnetic field declination. Thecalculations were made for two cases. Firstly, we simulated the distributionsof the ionospheric parameters under natural conditions without a powerfulhigh-frequency wave effect. Secondly, the distributions of the ionosphericparameters were calculated on condition that an ionospheric heater, situated atthe point with geographic coordinates of the HF heating facility near Tromso,Scandinavia, has been operated, with the ionospheric heater being located onthe night side of the Earth. The results of the numerical simulation indicatethat artificial heating of the ionosphere by powerful high-frequency wavesought to influence noticeably on the spatial structure of the nighttimehigh-latitude F-region ionosphere in the vicinity of the ionospheric heater.