Translations:Dictionary:F-layer/1/zh-cn

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1. 电离层中的一层电离空气;其可反射高达50mMHz的无线电波。在白天,F-层 细分为两层, 较低的一层 (F1) 通常为175至250公里高并且其只在白天可被发现。较高的 F2层大约在250至400公里并且同时出现在夜间和白天其为夜间HF无线电波的主要反射体。见图A-22. 2. 一个在地球外核与内核之间的转换层。见图E-1.