Changes in the atmospheric-lens modulation transfer function used for calibration in solar speckle interferometry

Details Changes in the atmospheric-lens modulation transfer function used for calibration in solar speckle interferometry Changes in the atmospheric-lens modulation transfer function used for calibration in solar speckle interferometry

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978josa...68.1063a&link_type=abstract

Optical Society of America, Journal, vol. 68, Aug. 1978, p. 1063-1066.

Physics

Optics

16

Atmospheric Optics, Interferometry, Modulation Transfer Function, Power Spectra, Solar Granulation, Speckle Patterns, Atmospheric Turbulence, Spatial Filtering, Telescopes, Turbulence Effects

Scientific paper

A method is described for the calibration of power spectra of nonstellar astronomical objects, by the use of changes in seeing conditions during speckle-interferometric measurements. Results are given for an application of this technique to solar granulation. The correction of 40 analyses, determined with Fried's parameter ranging between 2.5 and 11.5 cm, provides satisfactory convergence, and thus permits estimation of the solar granulation power spectrum for frequencies up to 2.5 per arcsec.

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