Original Article

Experimental Astronomy

, Volume 34, Issue 3, pp 669-703

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

Dynamical attitude model for Gaia

  • D. RisquezAffiliated withLeiden Observatory, Leiden University Email author 
  • , F. van LeeuwenAffiliated withInstitute of Astronomy
  • , A. G. A. BrownAffiliated withLeiden Observatory, Leiden University


The Dynamical Attitude Model (DAM) is a simulation package developed to achieve a detailed understanding of the Gaia spacecraft attitude. It takes into account external physical effects and considers internal hardware components controlling the satellite. The main goal of the Gaia mission is to obtain extremely accurate astrometry, and this necessitates a good knowledge of Gaia’s behaviour as a spinning rigid body under the influence of various perturbations. This paper describes these perturbations and how they are modelled in DAM.


Gaia Spacecraft attitude Astrometry Simulation