Contrasting O/X-mode heater effects on O-mode sounding echo and the generation of magnetic pulsations

Spencer Kuo; Wei Te Cheng; Arnold Snyder; Paul Kossey; James Battis

doi:10.1029/2009GL041471

Contrasting O/X-mode heater effects on O-mode sounding echo and the generation of magnetic pulsations

Spencer Kuo, Wei Te Cheng, Arnold Snyder, Paul Kossey, James Battis

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Article number	L01101
Journal	Geophysical Research Letters
Volume	37
Issue number	1
DOIs	https://doi.org/10.1029/2009GL041471
State	Published - Jan 2010

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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abstract = "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.",

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AU - Kossey, Paul

AU - Battis, James

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