查询词典 F layer

Ionosphere can be divided into D layer, E layer and F layer.

电离层又可细分为 D层、E层和F层。

At the low point of the solar cycle, EUV radiation from the sun is weak and the density of charged particles in the F layer of the ionosphere is least.

在太阳周期的低点， EUV 辐射从太阳是微弱的并且密度荷电粒子在电离层的F 层数是最少。

The F layer is of most importance for HF communications as it is present during day and night, it is located at the greatest height, and it reflects the highest frequencies in the HF band.

F 层数是多数重要为HF 通信照原样存在在日夜期间，它位于在最了不起的高度，并且它反射最高的频率在HF 带。

HF communication generally depends on the reflection of signals from the higher F layer and such signals must travel through the D layer at least twice.

HF 通信一般取决于信号的反射从更高的F 层数并且这样信号必须游遍D 层数至少两次。

Sporadic E occurs at a lower height than the F layer and this tends to limit the distance over which propagation is possible in a single hop.

分散E 比F 层数和这倾向于限制传播是可能的在一棵唯一蛇麻草的距离发生在更低的高度。

Hundreds of kilometers in altitude, according to the distribution of electron density with height, usually divided into D layer, E layer and F layer (F layer during the day is divided into F1 layer and F2 layer).

在数百公里高度以下，根据电子密度随高度分布，通常分为D层、E层和F层（F层白天分为 F1层和F2层）。

It is concluded, that the E2 layer is a normal layer, controled purely by solar ultraviolet radiation; the annual variation of the solar height at the time of first ionization of the E2 layer is irregular, whereas this solar height of the F layer has a regular annual variation.

可以确认，E2层是一个純受太阳紫外輻射所控制的正常层次；該层每天开始电离时的太阳高度年变化是沒有規律的，而F层每天开始电离时的太阳高度却具有有規律的年变化。

The results showed that the concentration of dissolved organic carbon in leachate from fresh litter fall was lower and that from F layer was higher for both plantations. In Castanopsis plantation, DOC concentration declined with the increasing number of leaching times, whereas that in China fir plantation increased at first then decreased.

光谱特征。结果表明，格氏栲和杉木人工林新近凋落物淋出液的DOC浓度较低，F层淋出液的DOC浓度较高；格氏栲凋落物淋出液的DOC浓度基本上随淋溶次数的增加而降低，杉木的则先升后降。

During years of exceptionally high sunspot activity, as was the case in 1990 and 1991, the F-layer of the ionosphere is capable of refracting signals above 54 MHz.

在几年格外高黑点活动期间，象案件1990 年和1991 年，电离层的F 层数是能折射信号在54 兆赫之上。

If the more intense of these rays travel up through the E-layer they will encounter the F-layer with the distinct possibility of localised ionisation.

如果强烈这些光芒游遍E 层数他们将遇到F 层数以地方化的电离的分明可能性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。