Science Fair Project Encyclopedia
Frequency of optimum transmission
In the transmission of radio waves via ionospheric reflection, Frequency of Optimum Transmission, often abbreviated FOT, is the highest effective (i.e. working) frequency that is predicted to be usable for a specified path and time for 90% of the days of the month. The FOT is normally just below the value of the maximum usable frequency (MUF). In the prediction of usable frequencies, the FOT is commonly taken as 15% below the monthly median value of the MUF for the specified time and path.
The FOT is usually the most effective frequency for ionospheric reflection of radio waves between two specified points on Earth.
Synonyms for this term include:
- frequency of optimum traffic
- optimum traffic frequency
- optimum transmission frequency
- optimum working frequency
Sources
Last updated: 06-23-2005 00:26:39
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details