本文選題：電離層擾動(dòng) + 多普勒頻率偏移��； 參考：《電波科學(xué)學(xué)報(bào)》2017年03期

【摘要】：地震、臺(tái)風(fēng)、磁暴等天氣事件爆發(fā)時(shí),引發(fā)的電離層擾動(dòng)會(huì)對(duì)無線電波的傳播環(huán)境造成影響,使空間傳播的高頻無線電信號(hào)產(chǎn)生多普勒頻率偏移.針對(duì)此問題,提出了一種新型的高集成度的高頻多普勒探測(cè)系統(tǒng).通過研發(fā)的高集成度的高頻多普勒接收機(jī)接收來源于電離層反射的高頻無線電信號(hào),經(jīng)過信號(hào)處理電路的混頻處理獲得低中頻信號(hào),再通過數(shù)據(jù)采集卡采集信號(hào)并保存在PC機(jī)上,利用上位機(jī)軟件對(duì)保存的數(shù)據(jù)進(jìn)行實(shí)時(shí)處理,得到高頻多普勒頻移的變化曲線,從而研究電離層擾動(dòng)特征.同時(shí)給出了電離層日出效應(yīng)、偶發(fā)E層和行進(jìn)式電離層擾動(dòng)等探測(cè)實(shí)例.實(shí)際觀測(cè)表明:該探測(cè)系統(tǒng)運(yùn)行穩(wěn)定可靠,可以用于電離層環(huán)境的長(zhǎng)期監(jiān)測(cè).
[Abstract]:When earthquakes, typhoons, magnetic storms and other weather events erupt, the ionospheric disturbances will affect the propagation environment of radio waves and cause the Doppler frequency offset of the high frequency radio signals propagated in space.In order to solve this problem, a new high-frequency Doppler detection system with high integration is proposed.A highly integrated high-frequency Doppler receiver was developed to receive high-frequency radio signals from ionospheric reflection, and the low-intermediate frequency signals were obtained by mixing the signal processing circuits.Then the data are collected by data acquisition card and stored on PC. The data stored in PC are processed in real time by the software of upper computer, and the change curve of high frequency Doppler frequency shift is obtained, thus the characteristics of ionospheric disturbance are studied.Examples of ionospheric sunrise effect, occasional E layer and traveling ionospheric disturbance are also given.Practical observations show that the system is stable and reliable and can be used for long term monitoring of ionospheric environment.
【作者單位】： 武漢大學(xué)電子信息學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41374168)
【分類號(hào)】：TN011
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本文編號(hào)：1735646