The diurnal variation of Elayer is relatively smooth.
电离层E层的变化相对平缓。
2
If a layer is 3D you can use AA to show the Material Options, E shows any Effects applied, and UU displays all the modified properties for the layer selected.
如果是3D图层，可以使用AA显示材质选项，E是应用过的特效，UU显示选中图层修改过的参数。
3
The major work in this paper has been carried out in the following three aspects: The first part deals with theoretic model of the mid-latitude ionospheric Elayer.