Solar Flux [SFU]

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    Solar Flux is measured in solar flux units (SFU) and is the amount of radio noise or flux that is emitted at a frequency of 2800 MHz. The solar flux is closely related to the amount of ionization and hence the electron concentration in the F2 region. As a result, it gives a very good indication of conditions for long-distance communication.
    The higher the solar flux, the better for amateur radio.

    Categories: Propagation
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