Airmass & Scintillation Calculator
This calculator will give you an approximation for airmass and scintillation (for small and modest
aperture telescopes).
Note: This calculator uses cookies to optionally remember your Latitude, Longitude and Aperture settings. If you
do not have cookies enabled it will still function.
Also check out Airmass Calc, a Windows-based airmass calculator with a GUI, which is available here.