海口电离层变化特征

The Ionosphric Characteristics of Haikou Region

本文对海口地区电离层变化特征进行了综合分析。结果表明：海口地区电离层变化具有明显的地域特点。海口地区电离层参数的日变化、季变化、年变化异常，以及夜间Ｅ层（微粒Ｅ）和夜间扩展Ｆ等变化特征说明除主要的电离源太阳外，还存在着其它影响当地电离层生成的因素。

in this paper, the ionospheric characteristics at Haikou are presented.It shows that the ionospheric variation at HaiKou has an obvious reginal characteristics. Some reasons of formed ionospheric charcteristics are also discussed. The obnormality variations(diurnal. seasnal. yearly variation) of the ionorpheric parameters and the variations of both particle E (Es-k) and spread F show that there are also another ionizing sources affecting the ionosphere except the sun.