Low-frequency hiss-like whistler-mode waves generated by nonlinear three-wave interactions outside the plasmasphere

2019 ◽  
Vol 26 (12) ◽  
pp. 122901 ◽  
Author(s):  
Zhonglei Gao ◽  
Zhengyang Zou ◽  
Pingbing Zuo ◽  
Yi Wang ◽  
Zhaoguo He ◽  
...  
Keyword(s):  
Low Frequency ◽  
Wave Interactions ◽  
Whistler Mode ◽  
Whistler Mode Waves

Modulation of Whistler Mode Waves by Ultra‐Low Frequency Wave in a Macroscale Magnetic Hole: MMS Observations

2021 ◽  
Author(s):  
He Zhang ◽  
Zhihong Zhong ◽  
Rongxin Tang ◽  
Xiaohua Deng ◽  
Haimeng Li ◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Wave ◽  
Whistler Mode ◽  
Whistler Mode Waves

scholarly journals Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study

2015 ◽  
Vol 42 (18) ◽  
pp. 7273-7281 ◽  
Author(s):  
C. A. Cattell ◽  
A. W. Breneman ◽  
S. A. Thaller ◽  
J. R. Wygant ◽  
C. A. Kletzing ◽  
...  
Keyword(s):  
Statistical Study ◽  
Low Frequency ◽  
Magnetic Storms ◽  
Whistler Mode ◽  
Van Allen Probes ◽  
Whistler Mode Waves

On the upper frequency limit of whistler mode waves observed by low-altitude spacecraft

2020 ◽  
Author(s):  
Frantisek Nemec ◽  
Ondřej Santolík ◽  
Michel Parrot
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Waves ◽  
Low Frequency ◽  
Realistic Model ◽  
Wave Intensity ◽  
Frequency Limit ◽  
Whistler Mode ◽  
The Earth ◽  
Whistler Mode Waves ◽  
Low Altitude

<p>Frequency-latitude plots of electromagnetic wave intensity in the very low frequency range (VLF, up to about 20 kHz) observed by the low altitude DEMETER spacecraft are analyzed. Apart from electromagnetic waves generated by plasma instabilities in the magnetosphere, a significant portion of the detected wave intensity comes from ground-based lightning activity and VLF military transmitters. These whistler mode waves are observed not only close to source locations, but also close to their geomagnetically conjugated points. There appears to be an upper frequency limit of such emissions, where the wave intensity substantially decreases. Its frequency roughly corresponds to half of the equatorial electron cyclotron frequency at a respective magnetic field line, suggesting a relation to wave ducting in ducts with enhanced density. However, it seems to exhibit a non-negligible longitudinal dependence and it is different during the day than during the night. We use a realistic model of the Earth’s magnetic field to explain the observed variations. We interpret the observations in terms of ducted/unducted wave propagation, and we compare the wave intensities in the source hemisphere with those measured in the hemisphere geomagnetically conjugated.</p>

scholarly journals Radio waves and whistler-mode waves in solar wind and their interactions with energetic electrons

2020 ◽  
Author(s):  
Cynthia Cattell ◽  
Aaron Breneman ◽  
Lindsay Glesener ◽  
Ben Leiran ◽  
Ben Short ◽  
...  
Keyword(s):  
Solar Wind ◽  
Radio Waves ◽  
Whistler Mode ◽  
Energetic Electrons ◽  
Whistler Mode Waves
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