TEC enhancements during HF ionospheric heating experiments

Details TEC enhancements during HF ionospheric heating experiments TEC enhancements during HF ionospheric heating experiments

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa13a1468f&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA13A-1468

Physics

[2403] Ionosphere / Active Experiments, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2439] Ionosphere / Ionospheric Irregularities, [2467] Ionosphere / Plasma Temperature And Density

Scientific paper

Experimental observations at the HAARP facility near Gakona, Alaska have shown TEC enhancements in association with powerful O-mode HF transmissions. Typical TEC enhancements are 10-20% of a TEC unit. A numerical ionospheric model has been used to simulate these events. HF energy is absorbed by the ionospheric electrons in a narrow range of altitudes below the F-region peak. Subsequent increases in electron temperature and ambipolar diffusion along the geomagnetic field act to redistribute existing ionization to higher altitudes where chemical recombination rates are lower. As a result the model shows TEC increases of about 10-20% of a TEC unit, similar to observations.

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