Significance of anisotropy and the outer scale of turbulence for optical and radio seeing

Details Significance of anisotropy and the outer scale of turbulence for optical and radio seeing Significance of anisotropy and the outer scale of turbulence for optical and radio seeing

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apopt..30..118c&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 30, Jan. 1, 1991, p. 118-126.

Astronomy and Astrophysics

Astronomy

24

Atmospheric Turbulence, Kolmogoroff Theory, Radio Astronomy, Radio Interferometers, Reflecting Telescopes, Seeing (Astronomy), Atmospheric Effects, Refractivity, Troposphere, Very Large Array (Vla)

Scientific paper

The small value found for the outer scale of turbulence (namely, 5 m or less) implies a narrow range of validity for the application of Kolmogorov's law to calculate the atmospheric limitations to the performance of telescopes and interferometers. Optical and radio seeing measurements are analyzed in support of a proposed turbulence spectrum which exhibits a spectral gap for scales (and hence interferometer baselines) between 10 and 1500 m but which obeys a 5/3 power law between 1500 and 20,000 m. The implications for forecasting the performance of optical and radio telescopes and interferometers are important.

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