ELF / VLF wave generation via ionospheric HF heating : Experimental comparison of amplitude modulation , beam painting , and geometric modulation

@inproceedings{Cohen2010ELFV,
  title={ELF / VLF wave generation via ionospheric HF heating : Experimental comparison of amplitude modulation , beam painting , and geometric modulation},
  author={Morris B. Cohen and Umran S. Inan and Mark Go and kowski and M. J. McCarrick},
  year={2010}
}
[1] Generation of ELF/VLF radio waves (300 Hz to 10 kHz) is achievable via modulation of natural currents in the lower ionosphere with high‐power HF (2–10 MHz) heating. Recently, Cohen et al. (2008b) put forth an alternative to conventional amplitude HF power modulation, therein referred to as geometric modulation, in which the HF ionospheric heating beam is geometrically steered at the desired ELF/VLF frequency, and found 7– 11 dB enhanced amplitudes, and ∼14 dB directional dependence for the… CONTINUE READING
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