高集成度的高频多普勒探测系统的设计

地震、台风、磁暴等天气事件爆发时，引发的电离层扰动会对无线电波的传播环境造成影响，使空间传播的高频无线电信号产生多普勒频率偏移.针对此问题，提出了一种新型的高集成度的高频多普勒探测系统.通过研发的高集成度的高频多普勒接收机接收来源于电离层反射的高频无线电信号，经过信号处理电路的混频处理获得低中频信号，再通过数据采集卡采集信号并保存在PC机上，利用上位机软件对保存的数据进行实时处理，得到高频多普勒频移的变化曲线，从而研究电离层扰动特征.同时给出了电离层日出效应、偶发E层和行进式电离层扰动等探测实例.实际观测表明:该探测系统运行稳定可靠，可以用于电离层环境的长期监测.

Design of a highly integrated high-frequency Doppler detection system

When strong weather events occur,such as earthquake,typhoon or magnetic storm,the propagation of radio waves can be influenced by the ionospheric disturbances caused by those weather events,leading to a Doppler Frequency Shift of the high-frequency (HF) radio wave.This paper proposes a new type of high integrated HF Doppler detection equipment.After receiving the reflected HF radio wave signal by the HF Doppler receiver,and then mixing the signal by the signal processing circuit to get the low intermediate frequency signal,we use the data acquisition card to sample the low intermediate frequency signal and save the data in PC.Finally,we can obtain the variation of the Doppler frequency shift by processing the saved data in specific software,thus research the features of the ionospheric disturbance.Several typical events of ionospheric disturbances measured by the highly integrated HF Doppler detection system are presented,including sunrise effect,sporadic E-layer and travelling ionospheric disturbances.Experimental results demonstrate that the HF Doppler detection system can run reliably and be used for the long term monitoring of the ionosphere environment.