青岛地区电离层Es特征统计分析

Statistical analysis on characteristics of Es in Qingdao region

利用青岛电波环境观测站电离层测高仪2001年至2011年共11年的观测数据,对Es层的季节变化和日变化特征进行了统计分析.统计结果表明:Es层发生概率与临频的季节变化和日变化为单峰结构,夏季和中午是Es发生最频繁和最强的时间;虚高的季节变化和日变化为双峰结构,季节上以4月份和9月份为主次峰,日变化上以7点和17点为主次峰;Es类型的发生次数从高到低依次为平型、低型、高型和尖型.

Using the observation data of ionosonde from year 2001 to 2011 at Qingdao radio environment observatory,a statistical analysis for seansonal and daily variation of sporadic E(Es)is performed.The main results show that,the seasonal and daily variation of occurrence probability are single-peak structure,which summer and midnoon are the most frequent and strong time.The seasonal and daily variation of height are dual-peak structure,which April and September are the primary and secondary peaks in season,while hour 7 and 17 are the peaks in day.The order of occurrence times of Es type from high to low is F,C,L,H.