Dualâ•'beam ELF wave generation as a function of power, frequency

Dec 8, 2012 - transmit simultaneously: one amplitude modulated (AM) HF beam modulates the conductivity of the lower ionosphere at ELF frequencies whil...

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(power, gain, HF frequency, and modulation fre- quency) and the applicable model of the ambient ionosphere the conductivity modulation is first computed as a function of altitude. This allows for the calculation of the modulated current altitude prof

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May 25, 2012 - waves have been generated via heating of the lower ionosphere. (50–100 km altitude) with High Frequency (HF, 3–10 MHz) radio waves. Because HF heating of the lower ionosphere changes the conductivity, on/off modulation of the HF he

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