中国典型区域Es特性研究  

Investigation on Es Properties in Representative Region of China

作　　者：孔庆颜[1] 陈跃[1] 柳文[1] 凡俊梅[1] 

机构地区：[1]中国电波传播研究所,青岛266107

出　　处：《空间科学学报》2012年第4期506-512,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(61032011)

摘　　要：利用中国海口、长春和拉萨三个站1976—1986年一个太阳周的观测数据,对中国典型区域的Es特性进行了研究.分析了不同强度Es(f_0E_s>3,5,7,9 MHz)出现概率随本地时、季节以及太阳活动的变化规律,并对电离层Es遮蔽情况(包括全遮蔽和半遮蔽)进行了系统分析.研究结果表明,各种强度的Es出现概率均是白天大于夜间,夏季高于其他季节,随太阳活动性变化规律不明显,地区差异较大,大部分情况拉萨站Es出现概率最高;对于全遮蔽和半遮蔽特性,不同站也表现出不同的分布规律.In this paper, the characteristics of sporadic E layer （Es） is discussed, using data mea- sured from China vertical stations of Haikou （20.02°N, l10.20°E）, Lhasa （29.39°N, 91.08°E） and Changchun （43.54°N, 125.19°E） for one solar cycle between January 1976 and December 1986. The diurnal, seasonal and solar activity variations of Es occurrence probability with critical frequencies greater than several special values （foEs 〉 3, 5, 7, 9MHz） are discussed. The obscure property is also analyzed. The results show that the most significant occurrence probability presented during daytime in summer months, and it does not depend significantly on solar activity. The distribution regularity is of great difference with different stations, and in most cases, Lhasa has the biggest occurrence probability. As to the blanketing property, three stations also have different distribution characteristics, except for that the obscure probability in summer is bigger than other seasons and is bigger in solar minimum than solar maximum too.

关 键 词：突发E层 foE_s 电离层遮蔽 E_s出现概率 

分 类 号：P352[天文地球—空间物理学]