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- 3 среднеширотная D-область ионосферы
- 3 характеристики шумов
- 3 характеристики шумів
- 2 both natural and anthropogenic di...
- 2 method the partial reflection
- 2 radio noises
- 2 radio sounding of the lower ionos...
- 2 recording the amplitudes of refle...
- 2 strong thunderstorms
- 2 the concentration of electrons
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