太阳活动高峰年山东区域电离层时空变化研究

Study of ionospheric spatial-temporal variation in Shandong region in solar activity years

2012年为太阳活动高峰年份,为了研究太阳活动高年区域电离层的变化特征,该文选取了山东区域内的SDCORS站点,构建了山东区域垂直电子含量(VTEC)球谐格网模型,对该年山东区域电离层时空变化规律进行分析。实验研究表明,在空间变化上山东区域电离层表现出较强的纬度相关性,出现了明显的分层现象。同时给出了山东电离层在时间上呈现出的时段变化、日变化、月变化、季节变化,发现VTEC受太阳活动影响较大,除了存在明显的单峰和双峰结构外,该年还发生了半年度异常现象。

The peak year of solar activity appeared in 2012.In order to study the variation of the regional ionosphere in high solar activity years,we modeled the spheric harmonic model of vertical total electron content（VTEC）over Shandong by solving the one-year GPS observation data of SDCORS in 2012,and analyzed the spatial-temporal characteristics of Shandong regional ionosphere.The results show that the VTEC value is greatly influenced by latitude,and occurs obvious stratification in in different periods.The regularity of the session change,daily variation,monthly change and seasonal variation of the regional ionosphere is further given.It is found that the VTEC value is closely related to the solar activity.The ionosphere has the phenomenon of Semi-annual anomaly as well as the appearance of peak and bimodal structure.