Ground Observations of Artificial E Region Field-Aligned Irregularities Over HAARP

Details Ground Observations of Artificial E Region Field-Aligned Irregularities Over HAARP Ground Observations of Artificial E Region Field-Aligned Irregularities Over HAARP

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa43b1589n&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA43B-1589

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2403 Active Experiments

Scientific paper

Heating experiments were performed at HAARP intended to create E region field aligned plasma irregularities (FAIs) at midday in July of 2008 when the critical frequency of the E layer is a maximum. Field-aligned backscatter was observed using a 30 MHz imaging coherent scatter radar located close to Homer, Alaska. Three experiment modes were used, involving 1) heating alternately at zenith and magnetic zenith, 2) heating using triangular power modulation, and 3) heating slightly above and below the second electron gyroharmonic. Strong echoes were observed in all cases. Radar imaging and other diagnostic methods are used to examine the degree to which irregularities can be observed outside the Spitze angle, the possible effects of predonditioning on thermal parametric instability, and the effects of the double resonance on backscatter intensity and irregularity formation.

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