Refined runway visual range measurement model incorporating brown carbon aerosol effects

Runway visual range (RVR) is a pivotal meteorological metric governing low-visibility civil aviation operations. Conventional RVR calculation frameworks mainly account for black carbon and scattering aerosols, yet brown carbon (BrC), with pronounced wavelength-selective absorption, induces two unrecognized systematic errors via extinction spectral mismatch and chromatic visual threshold deviation, with its influence mechanisms largely uncharacterized. This Letter presents a refined RVR model explicitly incorporating BrC’s chromatic optical effects. Experimental validation verifies its efficacy, providing quantitative support for advancing RVR observation standards and enhancing low-visibility measurement fidelity.