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sci.visibility-range-Koschmieder Calculator
Calculates meteorological visibility from the Koschmieder equation: MOR = 3/β_ext, where β_ext is the extinction coefficient of the atmosphere. Visibility threshold contrast Ct = 5% (Koschmieder) or 2% (Allard) — aerosol scattering (PM2.5) dominates visibility reduction in urban areas; fog (water droplets) reduces it most severely.
Inputs
Sigma Extinction Per Km
Reference formula or conversion factor shown for context.
Contrast Threshold
Reference formula or conversion factor shown for context.
Results
visual range VR (km)
The difference between the maximum and minimum values.
meteorological optical range MOR (km)
The difference between the maximum and minimum values.
VR = -ln(ε)/σ
Sample size or count used in the calculation.
MOR = 3.912/σ
Reference formula or conversion factor shown for context.
visibility category
The classification bucket this result falls into based on the computed value and the applicable reference scale.