武汉地区Es回波多普勒特性的观测与分析  

Observation and Analysis of Doppler Characteristic of Es Echo in Wuhan

作　　者：朱正平[1] 李震宇 Zhu Zhengping;Li Zhenyu(College of Electronics and Information Engineering,South-Central University for Nationalities,Wuhan 430074,Chin)

机构地区：[1]中南民族大学电子信息工程学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2018年第2期85-89,共5页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(41474135;41474134)

摘　　要：利用最新研制的高频多普勒接收机对10MHz BPM授时信号进行了长时间监测,应用数字信号处理技术,获取连续高精度的多普勒频移,结合PDI-2数字测高仪观测到的电离层频高图数据,实现了对Es层反射回波特性的研究.构建了电离层不规则体反射电波理论模型,仿真出在该模型下电离层反射回波的多普勒谱特性,并结合高频多普勒接收机的实测数据,绘制了Es回波的多普勒频移曲线,结果表明:仿真结果与实测结果很好地吻合,并基于此估算出了Es层不规则体的运动速度.This paper has a long time observation of the 10 MHz BPM timing signal by the newly developed high-frequency Doppler receiver,which uses digital signal processing technology to obtain continuous high-precision Doppler shift,and combines with the ionograms recorded by PDI-2 digisonde to achieve Es layer reflection echo characteristics. In this paper,a theoretical model of radio wave reflection from ionospheric irregularities is constructed and the Doppler spectral characteristics of the ionospheric echo is simulated,and combined with the measured data of the high frequency Doppler receiver,the Doppler shift curve of the Es echo is drawn. Results show that the simulation results accord with experiment results very well. Based on these,the velocity of ionospheric irregularities in Es layer is estimated.

关 键 词：Es回波 高频多普勒频移 电离层不规则体 

分 类 号：P352[天文地球—空间物理学]