中国南京地区L波段电离层闪烁初步统计分析

Preliminary Statistic Analysis of L-band Ionospheric Scintillation Over Nanjing Region in China

利用南京地区2008年11月至2009年l0月电离层闪烁监测数据,统计分析了该地区一年间L波段电离层幅度闪烁发生率的逐日变化、逐月变化、地方时变化和空间分布等特征.统计结果表明,在此期间,南京地区L波段电离层幅度闪烁活动比较平静,主要以0.1<S_4<0.2的闪烁为主,S_4>0.2的闪烁很少发生.不同强度幅度闪烁表现出一致的时间变化和空间分布特征,2008年11月为最小,2009年6月、8至10月闪烁发生率都有明显的增强,在10月达到最大,在8月和10月的S_4>0.2的闪烁主要出现于正午到日落前这段时间;对于闪烁的空间分布,单站一年数据统计显示,测站北向闪烁的发生频率高于南向,但该统计结果需要更多的数据样本进行进一步的验证.

Data recorded by a GPS ionospheric scintillation monitor installed in Nanjing has been used to study the day-to-day, month-to-month, local time and special variation characteristics of L-band ionospheric amplitude scintillation during the period between November 2008 and October 2009, which lays the foundation for grasping disciplines of the ionospheric scintillation in future. The preliminary statistical analysis shows that the amplitude scintillations were quite quiet and the scintillation activities with S4 〉 0.2 occurred infrequently. Different intensities of amplitude scintillation have a common spatiotemporal variation characteristics. The occurrence rate in Jun., Aug., Sept. and Oct. is higher than that in other months, and the highest occurrence rate took place in October and the lowest in November. The occurrence rate in northern direction is higher than that in the southern direction. But the results are not approved fully. So it is necessary to analyze and certify them in future.