𝐍𝐨𝐜𝐭𝐮𝐫𝐧𝐚𝐥 𝐓𝐫𝐚𝐧𝐬𝐦𝐢𝐬𝐬𝐢𝐨𝐧 🌕
At night, once the sun begins to set, the electrons and ions in the D region recombine rapidly – leaving more room for the radio waves to travel a little farther up. Above the D region, the F1 and F2 regions are also recombining, but much more slowly than the D region. When the radio waves hit those regions of the ionosphere, they have a chance to be reflected or bent back toward the earth.