Abstract

A simple, inexpensive, all solid-state analog computer has been developed for calculating the visual range. Using an input signal from a transmissometer, the computer calculates the visual range by repeatedly solving the Allard and Koshmieder visibility laws. It is accurate to ±2.0% for visual ranges of between 500 ft (150 m) and 5000 ft (1500 m).

© 1976 Optical Society of America

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