Monitoring the scale factor of the PICARD SODISM instrument

P. Assus (1) , Abdanour Irbah (2) , P. Bourget (2) , T. Corbard (1) , The Picard Team

1 CASSIOPEE - Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides
2 SA - Service d'aéronomie

The SODISM Telescope of the PICARD Space mission will perform diameter measurements by directly imaging the Sun on a CCD camera. An internal calibration system allows us to follow scale factor variations induced by instrument deformations resulting from temperature fluctuations on orbit or from others causes. We present this calibration system in this paper as well as some simulations on how to correct observations. (

Mots clés: space vehicles; instruments; Sun; oscillations; high angular resolution

Domaines: Astrophysique [astro-ph]

P. Assus, Abdanour Irbah, P. Bourget, T. Corbard, The Picard Team. Monitoring the scale factor of the PICARD SODISM instrument. Astronomical Notes / Astronomische Nachrichten, 2008, 329 (5), pp.517-520. ⟨10.1002/asna.200710987⟩. ⟨hal-00307143⟩