Ionospheric Doppler measurements by means of HF-radar techniques
Ionospheric Doppler measurements by means of HF-radar techniques
复制标题
通过高频雷达技术进行电离层多普勒测量
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. Altadill
中科院分区：
文献类型：
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作者：
C. Bianchi;D. Altadill
电离层动力学及其相关现象的研究主要基于多普勒漂移测量。利用高频雷达可以观测到等离子体密度、热层风等的时间变化（电离/复合）。多普勒漂移测量技术是一项相当复杂的技术，现在通过先进的电离层测深仪可以负担得起。垂直测深与干涉多普勒探测相结合，揭示了多普勒声源。回波信号包含被反射信号的每个点源对载波施加的频率多普勒频移。其他现象，如环境噪声和测量的固有误差，加上折射率的时间变化，以各种方式影响测量，阻碍了更好地量化结果。
Studies of the dynamics of the ionosphere and its related phenomena are mainly based on Doppler Drift meas- urements. The time variation (ionisation/recombination) of plasma density, thermospheric wind and others can be observed by means of HF-radars. The technique of Doppler Drift measurements is a quite complex technique that is now affordable by means of an advanced ionospheric sounder. The combination of vertical sounding and interferometric Doppler detection discloses the Doppler sources. The echo signal contains the Doppler shift in frequency imposed on the wave carrier by each point source where the signal is reflected. Other phenomena like environmental noise and the intrinsic error of the measurements that, together with the change in time of the re- fractive index, affect the measurements in various ways impeding to better quantify the results.