| solar flux unit | |
| Standard: | non-SI metric unit |
| Quantity: | spectral flux density |
| Symbol: | sfu |
| Units1: | SI units |
| Units2: | CGS units |
The solar flux unit (sfu) is a convenient measure of spectral flux density often used in solar radio observations, such as the F10.7 solar activity index:[1]
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; one Jy = 104 = 10−26 W⋅m−2⋅Hz−1 = 10−23 erg⋅s−1⋅cm−2⋅Hz−1.