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Excitation of Magnetospheric Resonators with HAARP

Excitation of Magnetospheric Resonators with HAARP. Anatoly V. Streltsov Embry-Riddle Aeronautical University. RESONANCE/HAARP November 8, 2011 College Park, MD.

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Excitation of Magnetospheric Resonators with HAARP

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  1. Excitation of Magnetospheric Resonators with HAARP Anatoly V. Streltsov Embry-Riddle Aeronautical University RESONANCE/HAARP November 8, 2011 College Park, MD

  2. HAARP can excite ULF waves inside 1) Global Magnetospheric Resonator and 2) Ionospheric Alfven Resonator Mechanism of the wave generation is changing of the ionospheric conductivity by heating the ionosphere with RF waves when the electric field exists there.

  3. Global Resonator

  4. HAARP Heating Experiment

  5. Simulations of different heating regimes for IFI excitation continues heating single-pulse heating periodic heating [Streltsov et al., 2005]

  6. Different Heating Regimes for IFI Excitation Old approach: heating of the same spot in the ionospehere [Streltsov et al., 2005] New approach: moving the spot with the phase velocity of the wave [Streltsov and Pedersen, 2010]

  7. HAARP Experiment 29 Oct 2008 HAARP HF digisonde (A. Lee Snyder)

  8. HAARP Experiment 29 Oct 2008

  9. HAARP all-sky imager (Todd Pedersen)

  10. UAF/GI magnetometer array (MAGI) Alaska

  11. Alaska

  12. M A G I M A G I

  13. This is how it happens …

  14. Substorms 29 Oct 2008 17 Jun 2010

  15. HAARP 3D

  16. 3D simulations of constant heating(high ionospheric conductivity)

  17. Observations and 3D simulations of effects from the constant heating of F-region

  18. Ionospherc Alfvén Resonator

  19. Wave reflection from the ionosphere: high SP : R = -0.310 low SP : R = 0.032 very low SP:R = 0.510

  20. Night (very low conductivity)

  21. Night (very low conductivity)

  22. Night (very low conductivity)

  23. IAR, very low conductivity, 1.75 Hz

  24. DEMETER - HAARP

  25. Conclusions: HAARP can efficiently generate large-amplitude ULF waves inside the global magnetospheric resonator and inside IAR. The wave generation is most efficient when the ionospheric conductivity is very low (nighttime) and the heating is performed with X-mode waves in a frequency range from 2.8 to 4.5 MHz. The structure of the waves inside IAR does NOT allow to make any conclusions about frequency of the resonator by measuring magnetic signals on the ground. The resonant wave can be determined from measuring electric field on the ground or electric and magnetic field on satellites and/or sounding rockets.

  26. Density cavities in a vicinity of auroral arcs Shepherd et al. [1998]

  27. Density cavities in the downward current channel

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