Tramonto sul mare: la rifrazione differenziale e la forma del Sole

Details Tramonto sul mare: la rifrazione differenziale e la forma del Sole Tramonto sul mare: la rifrazione differenziale e la forma del Sole

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006asuai...3...22s&link_type=abstract

Astronomia. La rivista dell'Unione Astrofili Italiani (ISSN 0392-2308), N. 3, p. 22 - 23 (maggio-giugno 2006)

Astronomy and Astrophysics

Astronomy

Differential Refraction

Scientific paper

Differential refraction near the horizon is a parameter which has to be directly measured, since it depends on meteo conditions. A method for measuring it is presented, and two cases are discussed in detail: an observation without sea horizon available and a photo with sea horizon made by Aldo Bambini. The equation for differential refraction Yr=a·Y+b is given in this particular case (Y being the altitude of a solar point; a=0.8, b=6') and the effects of its variation with altitude are shown.

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