F1 LAYER


Meaning of F1 LAYER in English

[F1 layer] n (1933): the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface

Merriam-Webster English vocab.      Английский словарь Merriam Webster.