基于GPS掩星观测的全球扩展F形态学研究  

Research on the global morphological features of spread F based on GPS occultation observations

作　　者：卢海梁[1] 邹玉华[2] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2011年第6期508-512,共5页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(41064003)

摘　　要：为研究全球扩展F的形态学特征,利用COSMIC系统提供的2009年12月至2010年12月的GPS掩星观测数据,通过分析电离层F层高度范围内C/A码信噪比扰动情况。研究结果表明:2010年春季(3月、4月和5月)和秋季(9月、10月和11月)期间,存在较强信噪比扰动的掩星事件出现次数较多,扰动强度较大;存在较强信噪比扰动的掩星事件主要发生在磁纬±20°之间和高纬地区,且强扰动主要发生在距地面200～400km高度范围;存在较强信噪比扰动的掩星事件主要发生在地方时夜间,在午夜前后出现次数较多。统计结果与已知的全球扩展F形态学特征较一致,说明利用GPS掩星观测技术可以有效地监测全球扩展F的形态学特征。The GPS occultation observation data during the period December 2009-December 2010 provided by COSMIC was used to study the global morphological features of spread F by analyzing C/A code SNR（Signal-to-Noise Ratio） fluctuations at the ionosphere F-region altitudes.The results show that the occultation events with larger SNR fluctuations took place more frequently in the spring（March-May） and autumn（September-November） of 2010,and their fluctuation intensities were greater.The occultation events with larger SNR fluctuations occurred mainly in the regions of ±20° geomagnetic latitude and at high latitudes,and strong fluctuations took place mainly in the altitude range of 200-400 km.The occultation events with larger SNR fluctuations occurred mainly at night,especially near local midnight.The present statistical results are in consistent with the known global morphological features of Spread F,which indicates that GPS radio occultation technique is effective to monitor the global morphological features of Spread F.

关 键 词：扩展F GPS GPS-COSMIC无线电掩星 

分 类 号：P352.7[天文地球—空间物理学]