摘要
真实的ＴＩＤ一类大尺度电离层扰动是非平稳和色散的，而且是统计非单一的．本文首先给出了描述这种真实扰动场的数学模型，进而导出了联系台阵探测可测量与扰动场传播参量的观测方程，在此基础上提出了求解观测方程的时频分析方法．这一台阵探测数据分析的新方法，既能分离出非单一电离层扰动场中各种准单一扰动成分，又能获得准单一扰动成分传播参量随时间的演变和随频率的色散．分析实例表明，本文方法分辨率好，精度高，结果可靠，是适用于ＴＩＤ一类大尺度电离层扰动台阵探测数据分析的有效方法．
Large scale ionospheric disturbances such as TIDs are generally unstationary,dispersive,and nonuniform.Firstly,this paper gives the observation equations relating observable quantities of array observation with propagating parameters of disturbance field.Then,the time-frequency analysis method for the observation equations is introduced.This newly developed method can both differentiate various quasi-uniform components from nonuniform ionospheric disturbances,and obtain the evolution of propagating parameters of quasi-uniform components versus time as well as dispersion versus frequency.Instance Analysis shows that this method,with fine resolution,high precision,and reliable result,is effective on array observation analysis of large scale ionospheric disturbances.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1996年第1期17-25,共9页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
电离层扰动
非单一场
时频分析
台阵探测
Ionospheric disturbances,Nonuniform field,Time-frequency analysis,Temporal evolution,Dispersion.
