Alternate Definitions for lowest usable frequency

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Term: lowest usable frequency
Definition:

The lowest frequency that allows reliable long-range HF radio communication by ionospheric refraction.
NOAA SWPC SpWx Glossary Planetary Astrophysics Heliophysics LUF
Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
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https://n2t.net/ark:/99152/h9908