INTERACTION BETWEEN THE POWERFUL HIGH-FREQUENCY RADIO WAVE AND THE LOWER TERRESTRIAL IONOSPHERE

The terrestrial ionospheric plasma can be heated by a powerful ground-based high-frequency radio wave, which results in the disturbance of the electron temperature and density. In this paper, a self-consistent model of interaction between the powerful HF radio wave and the lower ionosphere is presented. In this model, the self-absorption effect of radio wave is emphasized. For specific transmitter’s parameters （in this paper, P_ER = 200 MW, f= 7.0 MHz are used, which is at the range of many transmitters）, under the daytime ionospheric background, the calculated results show that the self-absorption effect is obvious, when h ＜ 90 km, but the effect can be ignored for h ＞ 90 km. The results also show that the maximum electron temperature enhancement is at the altitude of 70 km, which is three times of the undisturbed background. With the assumption of a recombination in lower ionosphere, the percentage of electron density enhancement is decreasing with the increase of ionospheric heights. For example, at the altitude of 70km, it is 55% or so, but at 120km altitude, it is about 4%.