Irradiance of a surface for every unit frequency or wavelength. The terms spectral flux density or even more confusingly "spectral depth" are employed. Non-SI units of spectral irradiance include things like Jansky = 10 W⋅m⋅Hz and solar flux device (1SFU = ten W⋅m⋅Hz). At nighttime, scan the horizon for https://prefabhouse43321.blogoscience.com/45510955/light-steel-villa-for-dummies