MUF

MUF may refer to:MUF (programming language), or "Multi-User Forth", a Forth derivative used in TinyMUCK and descendantsMaximum usable frequency, the highest usable frequency in ionosphere-reflected radio transmissions, at some point in timeModerata Ungdomsförbundet, or Moderate Youth League, the Swedish Moderate Party's youth organizationMUF, the station code of the Manchester United FC Halt railway station
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adj. musty, fusty, stale, addled, not fresh, mouldy, moldy

Abbreviation for maximum usable frequency.

In radio transmission using reflection from the regular ionized layers of the ionosphere, the upper frequency limit that can be used for transmission between two points at a specified time. (188 ) Note: MUF is a median frequency applicable to 50% of the days of a month, as opposed to 90% cited for the lowest usable high frequency (LUF) and the optimum traffic frequency (FOT).

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