DOI: 10.1002/grl.50391
论文题名: High time resolution observations of HF cross-modulation within the D region ionosphere
作者: Langston J. ; Moore R.C.
刊名: Geophysical Research Letters
ISSN: 0094-9006
EISSN: 1944-8737
出版年: 2013
卷: 40, 期: 10 起始页码: 1912
结束页码: 1916
语种: 英语
英文关键词: Doppler shift
; HAARP
; HF cross-modulation
; ionospheric heating
Scopus关键词: Cross modulations
; HAARP
; High-frequency active auroral research programs
; High-time-resolution observations
; Ionospheric conductivity
; Ionospheric heating
; Ionospheric irregularities
; Steady-state condition
; Doppler effect
; Experiments
; Ionospheric measurement
; Modulation
; Probes
; D region
; Doppler effect
; frequency analysis
; heating
; ionosphere
; observational method
; resolution
; steady-state equilibrium
英文摘要: High-frequency cross-modulation is employed to probe the D region ionosphere during HF heating experiments at the High-frequency Active Auroral Research Program (HAARP) observatory. We have adapted Fejer's well-known cross-modulation probing method to determine the extent of ionospheric conductivity modification in the D region ionosphere with high (5 μsec) time resolution. We demonstrate that the method can be used to analyze D region conductivity changes produced by HF heating both during the initial stages of heating and under steady state conditions. The sequence of CW probe pulses used allow the separation of cross-modulation effects that occur as the probe pulse propagates upward and downward through the heated region. We discuss how this probing technique can be applied to benefit ELF/VLF wave generation experiments and ionospheric irregularities experiments at higher altitudes. We demonstrate that large phase changes equivalent to Doppler shift velocities >60 km/s can be imposed on HF waves propagating through the heated D region ionosphere. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879991707&doi=10.1002%2fgrl.50391&partnerID=40&md5=75b69f0b1aa22cb678afa596efdb5ca5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6270
Appears in Collections: 气候减缓与适应
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作者单位: Department of Electrical and Computer Engineering, University of Florida, 570 NEB, PO Box 116130, Gainesville, FL 32611, United States
Recommended Citation:
Langston J.,Moore R.C.. High time resolution observations of HF cross-modulation within the D region ionosphere[J]. Geophysical Research Letters,2013-01-01,40(10).