海南地区电离层F2层参数变化特性分析  

Variation characteristics of ionospheric parameters in F2 layer in Hainan

作　　者：王胜国 史建魁 王国军 孙海洋 WANG Shengguo;SHI Jiankui;WANG Guojun;Sun Haiyang(Bejing Institute of Applied Meteorology,Beijing 100029,China;National Space Science Center,Chinese Academy of Sciences,Bejjing 100190,China)

机构地区：[1]北京应用气象研究所,北京100029 [2]中国科学院国家空间科学中心,北京100190

出　　处：《测绘科学与工程》2020年第3期74-78,共5页Geomatics Science and Engineering

摘　　要：利用海南电离层DPS-4垂测数据详细分析了中国低纬地区的电离层F2层参数hmF2和foF2的变化特性,初步揭示了海南地区电离层F2层主要参数在太阳活动下降期的日变化、季节变化和随太阳活动性的变化特性。观测和分析结果表明:①在太阳高年的春秋季(二分点附近),foF2在午夜附近会重新增大达到新的极大值,且这个极大值很强,甚至会超过白天正午附近形成的极大值,这是太阳活动高年的特有现象;②foF2太阳活动高年明显不同于太阳活动中低年,在太阳活动高年,foF2达到日间极大值后,在冬季和春秋季会长时间维持至夜间;③日间电离层F2层的高度在春秋季最高,夏季其次,冬季最低;除太阳高年的春秋季外,在春秋季和冬季hmF2的日间极值要高于夜间极值,而夏季在整个太阳下降期hmF2的最大值都是出现在夜间。The data measured with DPS-4 digisonde at Hainan station is used to analyze the variation characteristics of ionospheric parameters(foF2,hmF2)in detail.The characteristics of diumal variation,seasonal variation and variation with solar activity of ionospheric parameters in F2 layer during solar activity descent period are revealed.The results indicate that:(a)during the solar maximum year,the value of foF2 can reach maximum value at midnight in equinox,even exceeding the value in the noon,which is a peculiar phenomenon in solar maximum year;(b)in the solar maximum year,if the value of foF2 reaches the maximum in the day,it can be kept till the night in winter and spring for a long time;(c)the height of hmF2 in daytime is the highest in spring and autum,second-highest in summer,and lowest in winter;except in the spring and autumn of a solar maximum year,the extreme value of hmF2 in daytime is higher than that in nighttime,and the maximum value of hmF2 in summer will appear at night in the whole solar activity descent period.

关 键 词：电离层参数 日变化 季节变化 太阳活动性 F2层峰值高度 

分 类 号：P352[天文地球—空间物理学]