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Old 25-05-2018, 09:22 AM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
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hi Luiz

the spreadsheet includes Airy's formula for the optics, but converted to arcseconds and added in quadrature in the complete FWHM calculation. hope this helps.

the complete FWHM formula is: FWHM in the chosen atm = SQRT(seeingFWHM^2 + scopeFWHM^2 + (2.35*guidingRMS)^2). It combines seeing effects, scope resolution and guiding blur.

Cheers Ray

Last edited by Shiraz; 25-05-2018 at 10:28 AM.
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