The Gaia Basic angle: measurement and variations

A. Mora, U. Bastian, M. Biermann, F. Chassat, L. Lindegren, I. Serraller, E. Serpell, W. van Reeven, N.A. Walton, F. Figueras, L. Balaguer-Núñez, C. Soubiran
2014 EAS Publications Series  
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
doi:10.1051/eas/1567010 fatcat:nzyidw57obbmjjyo7upgp6oaie