Latitudinal distribution of auroral kilometric radiation ordinary and extraordinary wave modes observed by KAGUYA

2014 ◽  
Author(s):  
Y. Goto ◽  
K. Uda ◽  
Y. Kasahara ◽  
K. Hashimoto
Keyword(s):  
Extraordinary Wave ◽  
Latitudinal Distribution ◽  
Auroral Kilometric Radiation ◽  
Wave Modes

scholarly journals Extraordinary wave modes in purely imaginary metamaterials beyond the critical angle

2021 ◽  
Author(s):  
Yangyang Fu ◽  
Jiaqing Liu ◽  
Daxing Dong ◽  
Youwen Liu ◽  
Jiaqi Tao
Keyword(s):  
Critical Angle ◽  
Extraordinary Wave ◽  
Wave Modes

scholarly journals A parametric ray tracing study of superluminous auroral kilometric radiation wave modes

2007 ◽  
Vol 112 (A10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Fuliang Xiao ◽  
Lunjin Chen ◽  
Huinan Zheng ◽  
Shui Wang
Keyword(s):  
Ray Tracing ◽  
Auroral Kilometric Radiation ◽  
Radiation Wave ◽  
Wave Modes

Collision frequency of electrons in the F region

1970 ◽  
Vol 48 (6) ◽  
pp. 653-658 ◽  
Author(s):  
C. S. G. K. Setty ◽  
A. R. Jain ◽  
M. K. Vyawahare
Keyword(s):  
Collision Frequency ◽  
Extraordinary Wave ◽  
Early Morning ◽  
Radio Waves ◽  
Height Range ◽  
F Region ◽  
Geographical Latitude ◽  
Late Evening ◽  
Wave Modes

The collision frequency of electrons in the F region of the ionosphere has been measured at Delhi (geographical latitude 28°38′ N, geographical longitude 77°13′ E) using a method similar to that suggested by Appleton. The amplitude and group path of short radio waves vertically incident on the F region of the ionosphere have been measured simultaneously at a suitable frequency (for both the ordinary and extraordinary wave modes) in early morning and late evening hours, corresponding to times of appearance and disappearance of the echo, respectively. Simultaneous changes in amplitude and group path are related to deduce the collision frequency. Some selected records taken near the time of sunrise have been analyzed and the values of collision frequency are found to be (4.2 ± 0.5) × 103 and (3.5 ± 0.5) × 103 s−1 for the ordinary and extraordinary waves, respectively, in the true-height range of 270–310 km.

scholarly journals Finite Larmor Radius Modifications to the Magnetoionic Wave Modes and Their Effects on Electron Cyclotron Maser Emission

1986 ◽  
Vol 39 (3) ◽  
pp. 407
Author(s):  
LT Ball ◽  
RG Hewitt
Keyword(s):  
Maximum Growth ◽  
Electron Cyclotron ◽  
Larmor Radius ◽  
Maser Emission ◽  
Finite Larmor Radius ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser ◽  
Auroral Kilometric Radiation ◽  
Solar Microwave ◽  
Wave Modes

Auroral kilometric radiation, Jupiter's decametric and Saturn's kilometric radio emissions, solar microwave spike bursts and microwave emissions from some flare stars have all been attributed to the electron cyclotron maser instability. The maser instability is usually assumed to involve the generation of magnetoionic waves. We investigate the modifications to the magneto ionic wave modes due to finite Larmor radius (FLR) corrections arising from a 'warm' background electron plasma with a Maxwellian distribution. We then consider the effects of these modifications on maser emission at frequencies near the fundamental of the electron cyclotron frequency fl e. The FLR effects are found to be small; the maximum temporal growth rate generally differs by ~ 10% from that for emission occurring in the magnetoionic modes. Small shifts occur in the frequencies and propagation angles corresponding to the maximum growth rates.

Monitoring of the Electron-Acceleration Region with Auroral Kilometric Radiation

2020 ◽  
Vol 60 (5) ◽  
pp. 538-546
Author(s):  
D. V. Chugunin ◽  
A. A. Chernyshov ◽  
I. L. Moiseenko ◽  
M. E. Viktorov ◽  
M. M. Mogilevsky
Keyword(s):  
Electron Acceleration ◽  
Acceleration Region ◽  
Auroral Kilometric Radiation
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