Global variation of meteor trail plasma turbulence
نویسندگان
چکیده
منابع مشابه
Meteor trail diffusion: 2. Analytical theory
A meteoroid penetrating the Earth’s atmosphere leaves behind a trail of dense plasma embedded in the lower E/upper D region ionosphere. While radar measurements of meteor trail evolution have been collected and used to infer meteor and atmospheric properties since the 1950s, no accurate quantitative model of trail fields and diffusion exists. This paper describes a 2-D analytical theory of mete...
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Fading times of radar echoes from underdense meteor trails in the upper mesosphere/lower thermosphere are commonly used to determine ambipolar diffusivities and hence ambient temperature. Diffusivities are generally expected to increase exponentially with height through the region from which the meteor trail echoes are obtained, viz., typically 70–110 km altitude for a ∼30-MHz radar. In practic...
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Critical physical issues can be specifically tackled with the global full-f gyrokinetic code GYSELA. Three main results are presented. First, the selfconsistent treatment of equilibrium and fluctuations highlights the competition between two compensation mechanisms for the curvature driven vertical charge separation, namely, parallel flow and polarization. The impact of the latter on the turbul...
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The use of meteor ionisation trails as ‘cheap satellites’ to reflect radio waves between two points on the earth's surface is an established technique, called Meteor Burst Communications (MBC). For MBC systems to take advantage of the different amplitude and duration patterns of different trail types it is necessary to predict these patterns from features of initial signals reflected from the t...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2011
ISSN: 1432-0576
DOI: 10.5194/angeo-29-2277-2011