精确
发表于 2025-4-1 03:56:21
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asthma
发表于 2025-4-1 07:33:18
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阻挡
发表于 2025-4-1 11:00:50
Introduction, portions of the path may not present a very serious obstacle to obtaining a reasonable estimate of the behaviour of radio waves in traversing it because some idea of the properties of the unknown regions may be obtained by interpolating between those regions where the characteristics of the ionosphere are known.
不法行为
发表于 2025-4-1 16:20:11
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somnambulism
发表于 2025-4-1 18:48:43
,Spherical Earth Propagation — The Idealized Case,surface of the earth is called a . We need not consider the actual hops at this stage but merely note that the projection of the path on to the surface of the earth (the “trace” of the path) is a great circle.