Abstract

A meteorological range measuring device in use at Barrow, Alaska, utilizing two dark cavities is described and sample data is presented. From the two values of range which can be computed from the equation, υ = x ln 50/ln[Bh/(BhBx)], an approximate relation is developed for a corrected range having the form 1/υc = K1/υ1K2/υ2. A concept of measuring error as instrumental scattering of horizon and background light by a constant factor, , is developed and is shown to be determinable from υ1 and υ2 by a relation of the form, = a1K2(1/υ1 − 1/υ2). The statistical properties of are examined from actual data and the possibilities of a single cavity system with a known are discussed.

© 1964 Optical Society of America

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