Loading ...
Sorry, an error occurred while loading the content.

GENERATION OF ELF/VLF WAVES WITH MULTIPLE-SITE EXCITATION

Expand Messages
  • humlobotomist
    GENERATION OF VLF WAVES IN THE IONOSPHERE WITH CO-HERENT MULTIPLE-SITE EXCITATION HIPAS and HAARP are two radiating facilities in the Arctic region. The
    Message 1 of 1 , Aug 2, 2006
    • 0 Attachment
      GENERATION OF VLF WAVES IN THE IONOSPHERE WITH CO-HERENT
      MULTIPLE-SITE EXCITATION


      HIPAS and HAARP are two radiating facilities in the Arctic region.
      The distance between these two radiating facilities is 287 km, which
      is on the order of the ELF/VLF wavelengths. The electrojet in the E
      region of the ionosphere above each facility can be modulated to
      radiate ELF/VLF waves via HF heating.

      These two facilities are link together to transmit HF heating power
      in a manner that can enhance the efficiency of excitation of ELF/VLF
      by both low frequency modulations and high frequency beam
      interactions. The electrojet radiates electromagnetic waves at its
      modulation frequency in the ELF/VLF band and thus becomes a wave
      source. When both HIPAS and HAARP are radiating with amplitude
      modulation (AM) at the same ELF/VLF frequency, the wave sources
      formed above the two sites become coherent.

      Coherent excitations by these two facilities can create constructive
      interference which is sensitive to the phase difference between these
      two sources. Density irregularities, or striations, generated by high
      power radio frequency heating, can be modeled as a vertical
      conducting surface in ionospheric region directly above each
      radiating facility.

      Since a conducting surface reflects electromagnetic waves, ELF/VLF
      waves will be reflected and will propagate within the ionospheric
      region between HIPAS and HAARP in a manner dependant upon the
      reflection coefficient of the surfaces. The multiple reflections
      between these two wave sources above HIPAS and HAARP create the
      equivalent of a large antenna source for ELF/VLF signals.
      Generalization of this result to N sites for ELF/VLF excitation could
      imply that it is more advantageous to distribute a given amount of
      power among N sites as opposed to a single site concentration.

      http://strike.colorado.edu/~sjg/URSI/data/wong9141.pdf
    Your message has been successfully submitted and would be delivered to recipients shortly.