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首页> 外文期刊>Annales Geophysicae >Typical disturbances of the daytime equatorial F region observed with a high-resolution HF radar
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Typical disturbances of the daytime equatorial F region observed with a high-resolution HF radar

机译：高分辨率高频雷达观测到的白天赤道F区的典型干扰

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HF radar measurements were performed near themagnetic equator in Africa (Korhogo 9°24'63''N–5°37'38''W) during theInternational Equatorial Electrojet Year (1993–1994). The HF radar is ahigh-resolution zenithal radar. It gives ionograms, Doppler spectra and echoparameters at several frequencies simultaneously. This paper presents acomparative study of the daytime ionospheric structures observed during 3 daysselected as representative of different magnetic conditions, given bymagnetometer measurements. Broad Doppler spectra, large echo width, andamplitude fluctuations revealed small-scale instability processes up to theF-region peak. The height variations measured at different altitudes showedgravity waves and larger-scale disturbances related to solar daytime influenceand equatorial electric fields. The possibility of retrieving the ionosphericelectric fields from these Doppler or height variation measurements in thepresence of the other possible equatorial ionospheric disturbances is discussed.
机译：在国际赤道电喷年（1993-1994）期间，在非洲的电磁赤道附近（Korhogo 9°24'63''N–5°37'38''W）进行了高频雷达测量。 HF雷达是高分辨率天顶雷达。它可以同时提供几个频率的离子图，多普勒频谱和回波参数。本文通过磁强计测量，提供了对3天观测到的白天电离层结构的比较研究，这些结构被选作代表不同的磁条件。宽的多普勒频谱，较大的回波宽度和振幅波动揭示了直至F区峰的小规模不稳定性过程。在不同高度测量的高度变化显示出重力波和与太阳白天影响和赤道电场有关的更大尺度的干扰。讨论了在存在其他可能的赤道电离层扰动的情况下，从这些多普勒或高度变化测量中获取电离层电场的可能性。

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