Misura del diametro solare ad almucantarat zero

TL;DR

This paper demonstrates a method to accurately measure the solar diameter at almucantarat zero using sunset videos, achieving a few arcseconds precision with a simple setup.

Contribution

It introduces a novel approach utilizing sunset video recordings at the horizon to determine the solar diameter with high accuracy.

Findings

Achieved a few arcseconds accuracy in solar diameter measurement.

Used 60 fps video recordings of sunsets at the horizon.

Validated the method with data from four sunsets on the Tyrrhenian Sea.

Abstract

Among several methods for accurate measurements of solar diameter, there are transits at fixed almucantarat used in solar astrolabes. The almucantarat is a circle of given height. The horizon circle is the zero almucantarat, and data from four sunsets on the Tyrrenian sea are discussed. The angular diameter of the Sun is recovered with a few arcseconds accuracy using 60 fps video of sunsets.