
Electromagnetic shadow zone is an important propagation character which is caused by atmospheric duct. The purpose of this paper is to find a method to predict such shadow zone. Two numerical models are introduced in this paper. The first one is used to predict the top hole in evaporation duct. The other one is to predict the skip zone in surface duct. It is concluded that these two models are effective.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
