F1 layer

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noun \ˈef-ˈwən-\

Definition of F1 layer

  1. :  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

1933

First Known Use of f1 layer

1933


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to cast off or become cast off

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