A comparison between estimations of Fried's parameter R0 simultaneously obtained by measurements of solar granulation contrast and of the variance of angle-of-arrival fluctuations

Details A comparison between estimations of Fried's parameter R0 simultaneously obtained by measurements of solar granulation contrast and of the variance of angle-of-arrival fluctuations A comparison between estimations of Fried's parameter R0 simultaneously obtained by measurements of solar granulation contrast and of the variance of angle-of-arrival fluctuations

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...75..377r&link_type=abstract

Solar Physics, vol. 75, Jan. 1982, p. 377-394.

Physics

10

Brightness Distribution, Radiant Flux Density, Solar Granulation, Telescopes, Atmospheric Attenuation, Periodic Variations, Power Spectra, Site Selection, Spectral Resolution, Systems Engineering, Temporal Distribution

Scientific paper

Estimations of Fried's (1965) parameter r0 are made simultaneously on the basis of the observed solar granulation contrast and the variance of angle-of-arrival fluctuations. The same telescope is used for both methods. The results correlate well, the mean ratio of the values obtained from the two methods being 1.4. The accuracy and sensitivity of the methods are discussed in terms of their range of application (site testing, seeing measurements during solar observations). Temporal power spectra of turbulent energy are computed, and evidence of long-period oscillations of approximately 10 min is found.

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