Unique concurrent observations of whistler mode hiss, chorus, and triggered emissions
نویسندگان
چکیده
منابع مشابه
Unique concurrent observations of whistler mode hiss, chorus, and triggered emissions
We present a unique 2 h ground-based observation of concurrent magnetospheric hiss, chorus, VLF triggered emissions as well as ELF/VLF signals generated locally by the High Frequency Active Auroral Research Program (HAARP) facility. Eccentricity of observed wave polarization is used as a criteria to identify magnetospheric emissions and estimate their ionospheric exit points. The observations o...
متن کاملMultistation observations of ELF/VLF whistler mode chorus
[1] An array of seven ELF/VLF receivers in Alaska is utilized for direction finding and determination of ionospheric exit point of whistler mode chorus waves from the Earth’s magnetosphere. Each receiver records both orthogonal horizontal magnetic components of the chorus waves. All sites use GPS-synchronized sampling, allowing for the localization of ionospheric exit points utilizing both arri...
متن کاملDependence of the Sweep Rate of Whistler-mode Chorus Emissions on the Plasma Density
Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is loca...
متن کاملRay tracing of whistler-mode chorus elements: implications for generation mechanisms of rising and falling tone emissions
Using a well-established magnetospheric verylow-frequency (VLF) ray tracing method, in this work we trace the propagation of individual risingand fallingfrequency elements of VLF chorus from their generation point in the equatorial region of the magnetosphere through to at least one reflection at the lower-hybrid resonance point. Unlike recent work by Bortnik and co-workers, whose emphasis was ...
متن کاملAn observation linking the origin of plasmaspheric hiss to discrete chorus emissions.
A long-standing problem in the field of space physics has been the origin of plasmaspheric hiss, a naturally occurring electromagnetic wave in the high-density plasmasphere (roughly within 20,000 kilometers of Earth) that is known to remove the high-energy Van Allen Belt electrons that pose a threat to satellites and astronauts. A recent theory tied the origin of plasmaspheric hiss to a seeming...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2017
ISSN: 2169-9380,2169-9402
DOI: 10.1002/2017ja024072