Doppler shift pulsations on whistler mode signals from a VLF transmitter
نویسندگان
چکیده
منابع مشابه
Multistation 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 کاملPreferential amplification of rising versus falling frequency whistler mode signals
Analysis of ground-based ELF/VLF observations of injected whistler mode waves from the 1986 Siple Station experiment demonstrates the preferential magnetospheric amplification of rising over descending frequency-time ramps. From examining conjugate region receptions of ±1 kHz/s frequency-time ramps, we find that rising ramps generate an average total power 1.9 times higher than that of falling ...
متن کاملThe Rotation of Hydromagnetic Waves by the Ionosphere
We show that the Doppler shift on whistler mode signals from VLF transmitters may be used to infer the magnetic field of an hydromagnetic wave above the ionosphere in the magnetosphere. This inferred field can then be compared with that measured on the ground. We examine one event in detail and show the data imply that a it/2 rotation of the orientation of the wave ellipse has occurred between ...
متن کاملTransmitter-induced modulation of subionospheric VLF signals: Ionospheric heating rather than electron precipitation
[1] The controlled keying of ground-based VLF transmitters with periodic on/off sequences allows the detection of weak but measurable cross-modulation effects on other subionospheric VLF probe signals used for VLF remote sensing. In this paper, we reexamine previously published and additional cases of such events and determine that the initial interpretations of such cross modulation as being d...
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UNLABELLED Background- Power motion-mode transcranial Doppler (TCD) (PMD) is a new, multigated technique that may simplify and enhance detection of embolus. We developed criteria for emboli detection using PMD. Then, we performed a blinded comparison of transcranial PMD with single-gate spectral TCD in TCD bubble study patients. METHODS Patients with right-to-left shunt as detected with stand...
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ژورنال
عنوان ژورنال: Journal of Atmospheric and Terrestrial Physics
سال: 1996
ISSN: 0021-9169
DOI: 10.1016/0021-9169(95)00184-0