solar flux unit

solar flux unit

[′sō·lər ¦fləks ‚yü·nət]
(astronomy)
A unit of solar radio emission per unit frequency interval, equal to 10-22 watt per square meter per hertz at the earth.
References in periodicals archive ?
The Sun is a strong radio source and its flux density is often given in solar flux units (sfu), where 1 sfu = [10.sup.-22] W [m.sup.-2] [Hz.sup.-1].
Note that solar flux units on the y-axis are log-transformed.
In solar radio astronomy [S.sub.f] is expressed in solar flux units (acronym: sfu), 1sfu being equal to [10.sub.-22] W * [m.sub.-2] H[z.sub.-1.] The Sun is a quite strong radio source, being a few orders of magnitude stronger that the brightest non-solar radio source in the microwave.