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

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Presentation transcript:

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

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.

Global Resonator

HAARP Heating Experiment

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

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]

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

HAARP all-sky imager (Todd Pedersen)

UAF/GI magnetometer array (MAGI) Alaska

M A G I M A G I

This is how it happens …

Substorms 29 Oct Jun 2010

HAARP 3D

3D simulations of constant heating (high ionospheric conductivity)

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

Ionospherc Alfvén Resonator

Wave reflection from the ionosphere: high  P : R = low  P : R = very low  P : R = 0.510

Night (very low conductivity)

IAR, very low conductivity, 1.75 Hz

DEMETER - HAARP

Conclusions: 1.HAARP can efficiently generate large-amplitude ULF waves inside the global magnetospheric resonator and inside IAR. 2.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. 3.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. 4.The resonant wave can be determined from measuring electric field on the ground or electric and magnetic field on satellites and/or sounding rockets.

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

Density cavities in the downward current channel