The Lacuna Phenomenon of Ionogram over Wuchang, China
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摘要: 本文揭示和研究了武昌上空电离层频高图中的Lacuna现象, 这次现象除具有一般Lacuna现象的主要特征外, 显著的不同之处是出现在地磁活动较低的日子.同时研究了Lacuna出现当天的一些异常情况.几个罕见现象集中于一天之内, 可能有其偶然性, 但由此至少提示了这样一点, 即在磁静日特殊事件易于探测, 容易辨认.Abstract: In this paper, a Lacuna phenomenon over Wuchang, China is revealed and studied. The obvious difference between this Lacuna phenomenon and the common one is that it occurs on a geomagnetieally quiet day.Some other very rare phenomena occurring in that day are also studied. It may by a coincidence that several rare phenomena come together on the same day. But at least it enlightens us on that the special events are liable to recognization on geomagnetieally quiet days.
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