The index of refraction structure constant,C2n indicates how strongly the index of refraction varies in a region of the atmosphere. These variations usually arise through turbulent motions, creating an inhomogeneous distribution of species, density, temperature and pressure. Because the index of refraction also depends on wavelength, the measured value of C2n will depend on wavelength. This C2n difference generally becomes more pronounced as the difference in wavelength increases. This paper describes a technique for converting between measurements of C2n at different wavelengths, and gives an example for converting from centimeter to visible and near IR wavelengths. © 2013 Optical Society of America
Lee R. Burchett and Steven T. Fiorino, "Wavelength correction of refractivity variation measurements," Opt. Express 21, 31990-31997 (2013). https://doi.org/10.1364/OE.21.031990
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