Physics – Plasma Physics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3701101k&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 1, CiteID L01101
Physics
Plasma Physics
1
Ionosphere: Active Experiments, Ionosphere: Ionospheric Irregularities, Space Plasma Physics: Active Perturbation Experiments
Scientific paper
The effects on the ionosphere of powerful O-mode and X-mode HF pump waves, modulated 3 minutes on and 1 minute off, were explored. The experiments were monitored using the digisonde and magnetometer located at the HAARP facility. The results show that the virtual heights of the O-mode sounding echoes shifted down/up as the O/X mode heater was turned on; the ionosphere also moved downward/upward accordingly. Enhanced spread-F was also observed in O-mode heater-on periods. Heater-induced magnetic pulsation was observed. Its intensity increased progressively in the heater on/off sequence and X-mode heater was more effective than O-mode heater in the generation of magnetic pulsation. In the last X-mode heater-on period, when the magnetic pulsation reached the highest level, pc 3 pulsations, with increasing intensity were also observed.
Battis James
Cheng Wei-Te
Kossey Paul
Kuo Spencer
Snyder Arnold
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