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Solar flux unit

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The solar flux unit (sfu) is a convenient measure of spectral flux density often used in solar radio observations:

1 sfu = 104 Jy = 10−22 W⋅m−2⋅Hz−1 = 10−19 erg⋅s−1⋅cm−2⋅Hz−1.

See jansky for further information about related units.