Solar diameter, eclipses and transits: the importance of ground-based observations

TL;DR

Ground-based observations of the solar diameter using planetary transits and eclipses are crucial for continuous, stable measurements unaffected by satellite limitations and atmospheric disturbances.

Contribution

The paper reviews and evaluates ground-based methods like transits and eclipses for measuring the solar diameter, highlighting their advantages and limitations.

Findings

Ground-based methods provide stable solar diameter measurements.

Planetary transits and eclipses are less affected by atmospheric turbulence.

The paper discusses the current state and challenges of these methods.

Abstract

The lifetime of a satellite is limited, and its calibration may be not stable, it is necessary to continue ground-based measures of the solar diameter with methods less affected by atmospheric turbulence, and optical aberrations: planetary transits and total eclipses. The state of art, advantages and limits of these methods are considered.