The Gaia Basic angle: measurement and variations
Alcione Mora, Ulrich Bastian, Michael Biermann, Fran\c{c}ois Chassat,, Lennart Lindegren, I\~naki Serraller, Edmund Serpell, Wouter van Reeven
TL;DR
This paper discusses the measurement and analysis of the Basic Angle between Gaia's telescopes, crucial for precise galactic surveys, using an interferometer system that has been monitored over a year.
Contribution
It presents the in-orbit performance and early results of the Basic Angle Monitoring system on the Gaia spacecraft, highlighting its measurement precision and stability.
Findings
High-quality data collected over a year
Stable in-orbit performance of the monitoring system
Early results demonstrate measurement accuracy
Abstract
The ESA Gaia mission uses two telescopes to create the most ambitious survey of the Galaxy. The angle between them must be known with exquisite precision and accuracy. An interferometer: the Basic Angle Monitoring system measures its variations. High quality data have been retrieved and analysed for more than a year. A summary of the in-orbit performance and some early results are presented
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