SuperDARN observations of ionospheric heater-induced upper hybrid waves

J. M. Hughes; W. A. Bristow; R. T. Parris; E. Lundell

doi:10.1029/2003GL018772

SuperDARN observations of ionospheric heater-induced upper hybrid waves

J. M. Hughes, W. A. Bristow, R. T. Parris, E. Lundell

Meteorology and Atmospheric Science

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19 Scopus citations

Abstract

Observations are reported of an undocumented HF scattering mode detected by the Kodiak SuperDARN radar during an O-mode heating experiment recently conducted at the HAARP facility near Gakona, AK. The main features of these observations include enhancements to the Kodiak radar spectrum at frequencies equal to the radar plus the heater frequencies (f_r + f_H) as well as somewhat weaker enhancements at (f_r + f_H) ± 85 and (f_r + f_H) ± 108 kHz. Observations were recorded for ∼20 minutes and enhanced spectra from the heated volume above HAARP were consistently observed by the Kodiak radar during times when the HAARP heater was transmitting. We suggest that the spectral enhancements indicate the presence of perpendicularly propagating upper hybrid (UH) waves which are believed to exist near the UH resonance layer.

Original language	English (US)
Pages (from-to)	SSC 13-1 - SSC 13-4
Journal	Geophysical Research Letters
Volume	30
Issue number	24
DOIs	https://doi.org/10.1029/2003GL018772
State	Published - Dec 15 2003

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

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10.1029/2003GL018772

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title = "SuperDARN observations of ionospheric heater-induced upper hybrid waves",

abstract = "Observations are reported of an undocumented HF scattering mode detected by the Kodiak SuperDARN radar during an O-mode heating experiment recently conducted at the HAARP facility near Gakona, AK. The main features of these observations include enhancements to the Kodiak radar spectrum at frequencies equal to the radar plus the heater frequencies (fr + fH) as well as somewhat weaker enhancements at (fr + fH) ± 85 and (fr + fH) ± 108 kHz. Observations were recorded for ∼20 minutes and enhanced spectra from the heated volume above HAARP were consistently observed by the Kodiak radar during times when the HAARP heater was transmitting. We suggest that the spectral enhancements indicate the presence of perpendicularly propagating upper hybrid (UH) waves which are believed to exist near the UH resonance layer.",

author = "Hughes, {J. M.} and Bristow, {W. A.} and Parris, {R. T.} and E. Lundell",

year = "2003",

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pages = "SSC 13--1 -- SSC 13--4",

journal = "Geophysical Research Letters",

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T1 - SuperDARN observations of ionospheric heater-induced upper hybrid waves

AU - Hughes, J. M.

AU - Bristow, W. A.

AU - Parris, R. T.

AU - Lundell, E.

PY - 2003/12/15

Y1 - 2003/12/15

N2 - Observations are reported of an undocumented HF scattering mode detected by the Kodiak SuperDARN radar during an O-mode heating experiment recently conducted at the HAARP facility near Gakona, AK. The main features of these observations include enhancements to the Kodiak radar spectrum at frequencies equal to the radar plus the heater frequencies (fr + fH) as well as somewhat weaker enhancements at (fr + fH) ± 85 and (fr + fH) ± 108 kHz. Observations were recorded for ∼20 minutes and enhanced spectra from the heated volume above HAARP were consistently observed by the Kodiak radar during times when the HAARP heater was transmitting. We suggest that the spectral enhancements indicate the presence of perpendicularly propagating upper hybrid (UH) waves which are believed to exist near the UH resonance layer.

AB - Observations are reported of an undocumented HF scattering mode detected by the Kodiak SuperDARN radar during an O-mode heating experiment recently conducted at the HAARP facility near Gakona, AK. The main features of these observations include enhancements to the Kodiak radar spectrum at frequencies equal to the radar plus the heater frequencies (fr + fH) as well as somewhat weaker enhancements at (fr + fH) ± 85 and (fr + fH) ± 108 kHz. Observations were recorded for ∼20 minutes and enhanced spectra from the heated volume above HAARP were consistently observed by the Kodiak radar during times when the HAARP heater was transmitting. We suggest that the spectral enhancements indicate the presence of perpendicularly propagating upper hybrid (UH) waves which are believed to exist near the UH resonance layer.

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SuperDARN observations of ionospheric heater-induced upper hybrid waves

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