Construction of trapezoidal channel as a part of temporary drain at zone f
The ionosphere f region is one of the most important region in the ionosphere . the night - time irregularities in this region can affect nearly all - frequency radio waves propagation through them
The study results support the treatment of reducing lunathyrium ningshenense to the synonymy of d . coreanum . they reveal that dryoathyrium erecta should be athyriopsis erecta ( similar to the outcome of molecular tree )
Ionospheric scintillation can be observated frequently in low - latitude of china , so it is very important to know the physical mechanism of night - time f region plasma instability and irregularities in it
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