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电离层折射与电波传播延迟
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电离层折射与电波传播延迟
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电离层折射与电波传播延迟
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ionospheric refraction and radio wave propagation delay
电离层折射与电波传播延迟
海拔高度60公里左右以上的地球大气圈,是由自由电子、正离子、负离子、分子和原子组成的处于部分电离或完全电离的部分。电波穿过电离层的传播过程中,在传播路径上等离子体不同的密度的折射和色散本领不同,折射使得电波传播偏离行进方向,色散效应导致电磁波传播的相速度高于真空中传播速度、群速度低于真空中传播速度,引起传播的延迟效应。
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