Visibility & extinction
Turn measured transmission into extinction and a derived optical range.
Calculator and method
YOUR INPUTS
Numeric inputs appear in a shared link. CSV data are kept out of the link.
Model calculation · not experimental data
β = −ln(T) / L R = −ln(C₀) / β
MODEL & BOUNDARIES
Know what the result means.
Homogeneous attenuation and calibrated transmission. The 5% convention gives WMO MOR only when the spectral response is qualified; otherwise this is a range at the measurement wavelength. It does not measure an open cleared corridor.
Version 1.0 · SI quantities are used internally, with displayed input units converted explicitly. Retain your assumptions with any exported result.
METHOD REFERENCES
Follow the definitions.
References support the physical relationships or measurement context. They do not validate any proposed weatherhill hardware.