منابع مشابه
Radar observations of meteor trails
Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract A Fresnel Transform technique has been developed at Adelaide to analyse radar meteor echoes detected in the transverse mode. The genesis for this technique was the study of the structure of the scattering ionization immediately behind the head of the trai...
متن کاملInterpretation of non-specular radar meteor trails
[1] Radar data of non-specular meteor trails shows two clear and consistent features: (1) non–specular meteor trails are observed from a narrower altitude range than are head echoes and (2) an approximately 20 ms delay between meteor head echoes and trail radar scatter. This paper shows that both features can result from meteor trail plasma instability. Simulations have demonstrated that trails...
متن کاملPlasma instabilities in meteor trails: Linear theory
[1] Ablation of micrometeoroids between 70 and 130 km altitude in the atmosphere creates plasma columns with densities exceeding the ambient ionospheric electron density by many orders of magnitude. Density gradients at the edges of these trails can create ambipolar electric fields with amplitudes in excess of 100 mV/m. These fields combine with diamagnetic drifts to drive electrons at speeds e...
متن کاملThe phenomena of meteor-burst propagation using reflections from ionized meteor trails is described in Recommendation
The ITU Radiocommunication Assembly, considering a) that experiments have already shown the practicability of utilizing the frequency band between 30 and 50 MHz for transmission by meteor-burst propagation to distances well beyond the horizon; b) that systems using this mode of propagation are already in service for burst data transmission, recommends 1. that Annex 1 be used as guidance for the...
متن کاملOn forward scatter of radio waves from meteor trails
In this paper, a new approach to forward scatter of radio waves from meteor trails is exposed. The attention is drawn to some macroscopic characteristics of a meteor plasma and it is shown that electron-ion collision frequency is not negligible, as commonly thought. A simple formula for calculations of radio waves maximum attenuation after the forward scattering is also pre-
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1970
ISSN: 0031-9171
DOI: 10.1063/1.1692803