scholarly journals Wave structure and polarization electric field development in the bottomside F layer leading to postsunset equatorial spread F

2015 ◽  
Vol 120 (8) ◽  
pp. 6930-6940 ◽  
Author(s):  
M. A. Abdu ◽  
J. R. Souza ◽  
E. A. Kherani ◽  
I. S. Batista ◽  
J. W. MacDougall ◽  
...  
Keyword(s):  
Electric Field ◽  
Wave Structure ◽  
Equatorial Spread F ◽  
Field Development ◽  
Spread F ◽  
Polarization Electric Field

Evidence for a large scale electric field gradient at the onset of equatorial spread-F

1984 ◽  
Vol 46 (4) ◽  
pp. 355-362 ◽  
Author(s):  
R Raghavarao ◽  
J.N Desai ◽  
B.G Anandarao ◽  
R Narayanan ◽  
R Sekar ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Field Gradient ◽  
Large Scale ◽  
Equatorial Spread F ◽  
Spread F

scholarly journals Relationships between pre-sunset electrojet strength, pre-reversal enhancement and equatorial spread-F onset

2010 ◽  
Vol 28 (2) ◽  
pp. 449-454 ◽  
Author(s):  
J. Uemoto ◽  
T. Maruyama ◽  
S. Saito ◽  
M. Ishii ◽  
R. Yoshimura
Keyword(s):  
Electric Field ◽  
Equatorial Electrojet ◽  
Layer Height ◽  
Equatorial Spread F ◽  
Magnetic Latitude ◽  
F Region ◽  
Spread F ◽  
Bottom Side ◽  
E Region ◽  
Height Increase

Abstract. The virtual height of the bottom side F-region (h'F) and equatorial spread-F (ESF) onsets at Chumphon (10.7° N, 99.4° E; 3.3° N magnetic latitude) were compared with the behaviour of equatorial electrojet (EEJ) ground strength at Phuket (8.1° N, 98.3° E; 0.1° N magnetic latitude) during the period from November 2007 to October 2008. Increase in the F-layer height and ESF onsets during the evening hours were well connected with the EEJ ground strength before sunset, namely, both the height increase and ESF onsets were suppressed when the integrated EEJ ground strength for the period from 1 to 2 h prior to sunset was negative. The finding suggests observationally that the pre-sunset E-region dynamo current and/or electric field are related to the F-region dynamics and ESF onsets around sunset.

scholarly journals Ionogram signatures of large-scale wave structure and their relation to equatorial spread F

2012 ◽  
Vol 117 (A8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Smitha V. Thampi ◽  
Roland T. Tsunoda ◽  
Lijo Jose ◽  
Tarun Kumar Pant
Keyword(s):  
Large Scale ◽  
Wave Structure ◽  
Equatorial Spread F ◽  
Spread F

First observations of large-scale wave structure and equatorial spread F using CERTO radio beacon on the C/NOFS satellite

2009 ◽  
Vol 36 (18) ◽  
Author(s):  
Smitha V. Thampi ◽  
Mamoru Yamamoto ◽  
Roland T. Tsunoda ◽  
Yuichi Otsuka ◽  
Takuya Tsugawa ◽  
...  
Keyword(s):  
Large Scale ◽  
Wave Structure ◽  
Equatorial Spread F ◽  
Spread F ◽  
Radio Beacon

scholarly journals Thermospheric meridional wind control of equatorial spread F and evening prereversal electric field

2006 ◽  
Vol 33 (7) ◽  
Author(s):  
M. A. Abdu ◽  
K. N. Iyer ◽  
R. T. de Medeiros ◽  
I. S. Batista ◽  
J. H. A. Sobral
Keyword(s):  
Electric Field ◽  
Meridional Wind ◽  
Equatorial Spread F ◽  
Spread F

scholarly journals Observation of a comb-shaped filamentary plasma array under subcritical condition in 303-GHz millimetre-wave air discharge

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Masafumi Fukunari ◽  
Shunsuke Tanaka ◽  
Ryuji Shinbayashi ◽  
Yuusuke Yamaguchi ◽  
Yoshinori Tatematsu ◽  
...  
Keyword(s):  
Electric Field ◽  
Focal Point ◽  
Incident Beam ◽  
Wave Structure ◽  
Field Vector ◽  
Interesting Phenomenon ◽  
Millimetre Wave ◽  
Field Plane ◽  
Subcritical Condition ◽  
Air Discharge

AbstractGas breakdown in the millimetre-wave frequency band is an interesting phenomenon in nonlinear dynamics such as self-organized structure formation. We observed the transition between two types of filamentary plasma arrays in air discharge driven by a 303-GHz millimetre wave. Plasma is ignited at a parabolic mirror’s focal point in the overcritical condition. One array parallel to the electric field vector appears with a spacing of λ/4 at the focal point. Filaments then separate into plasma lumps ~10 μs after ignition. At 20 μs, a new comb-shaped array grows in the subcritical condition. Filaments are parallel to the incident beam with spacing of 0.96 λ and elongate towards the incident beam. This comb-shaped array appears only in the electric field plane; bulk plasma with a sharp vertex forms in the magnetic field plane. This array is created by a standing wave structure generated by waves diffracted from the plasma surface. Filamentary plasma array formations can influence the energy absorption by the plasma, which is important for engineering applications such as beamed energy propulsion.

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