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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
Posts: 4,791
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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