anthropologist
发表于 2025-3-28 17:42:53
Negative Ions and the Ionospheric D Region, beginning of ionospheric investigations by radio wave propagation methods because of the influence exerted on the reflection and absorption of high-frequency radio waves by ionization at these altitudes. Nevertheless, the D region is today the least investigated of all ionospheric regions.
漫步
发表于 2025-3-28 21:44:22
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