Self-heating of the partial reflection experiment

Physics

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Collision Rates, D Region, Ionospheric Electron Density, Ionospheric Heating, Signal Reflection, Electron Density Profiles, Electron Energy, Ionospheric Propagation, Radio Echoes, Radio Frequency Heating

Scientific paper

Recent improvements in the D-region partial reflection experiment include higher power transmitters and higher gain antennas, both of which contribute to an increased effective radiated power. It is well known from artificial ionospheric heating experiments that high radiated powers can modify the ionosphere in the form of an increase in electron collision frequency; hence the partial reflection experiment is susceptible to self-perturbation. This paper presents, first, a theoretical examination of this self-heating effect based on a volume model of partial reflections and, second, actual observations of the effects of power on the data of the partial reflection experiment. The theoretical model is simulated on a digital computer with results presented for 2.66 MHz and 4.50 MHz for two different assumed electron density profiles. The actual data were taken at 4.50 MHz.

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