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Plasma wave radiation in the main ionospheric trough in the region of the terminator from the APEX satellite data |
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| Authors: | N I Izhovkina I S Prutensky S A Pulinets Z Klos H Rothkaehl |
| Institution: | (1) Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia;(2) Space Research Center, Polish Academy of Sciences, Bartycka 18a, 00-716 Warsaw, Poland |
| Abstract: | The data of measurements of broadband wave radiation in the main ionospheric trough in the subauroral zone of the topside ionosphere in the region of the day-night terminator (APEX satellite experiment) are presented. It is shown that the observed attenuation of electrostatic radiation in a broad frequency band and fluctuations (variations) in the cutoff frequency of the electrostatic mode spectrum at the level of the local plasma or upper hybrid frequency are related to plasma heating by damping electrostatic oscillations in the ionospheric trough. Waveguide channels for propagation of electromagnetic whistler-mode waves observed on the satellite can be generated during the propagation of a gravity-thermal disturbance from the terminator. |
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