CONFERENCE PROCEEDINGS
Advanced Search >
Home > Proceedings > Volume 9904 > Article
1 August 2016 Gaia: focus, straylight and basic angle
A. Mora, M. Biermann, A. Bombrun, J. Boyadjian, F. Chassat, P. Corberand, M. Davidson, D. Doyle, D. Escolar, W. L. M. Gielesen, T. Guilpain, J. Hernandez, V. Kirschner, S. A. Klioner, C. Koeck, B. Laine, L. Lindegren, E. Serpell, P. Tatry, P. Thoral
Author Affiliations +
Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave; 99042D (2016) https://doi.org/10.1117/12.2230763
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom
Abstract
The Gaia all-sky astrometric survey is challenged by several issues affecting the spacecraft stability. Amongst them, we find the focus evolution, straylight and basic angle variations Contrary to pre-launch expectations, the image quality is continuously evolving, during commissioning and the nominal mission. Payload decontaminations and wavefront sensor assisted refocuses have been carried out to recover optimum performance. An ESA-Airbus DS working group analysed the straylight and basic angle issues and worked on a detailed root cause analysis. In parallel, the Gaia scientists have also analysed the data, most notably comparing the BAM signal to global astrometric solutions, with remarkable agreement. In this contribution, a status review of these issues will be provided, with emphasis on the mitigation schemes and the lessons learned for future space missions where extreme stability is a key requirement.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
A. Mora, A. Mora, M. Biermann, M. Biermann, A. Bombrun, A. Bombrun, J. Boyadjian, J. Boyadjian, F. Chassat, F. Chassat, P. Corberand, P. Corberand, M. Davidson, M. Davidson, D. Doyle, D. Doyle, D. Escolar, D. Escolar, W. L. M. Gielesen, W. L. M. Gielesen, T. Guilpain, T. Guilpain, J. Hernandez, J. Hernandez, V. Kirschner, V. Kirschner, S. A. Klioner, S. A. Klioner, C. Koeck, C. Koeck, B. Laine, B. Laine, L. Lindegren, L. Lindegren, E. Serpell, E. Serpell, P. Tatry, P. Tatry, P. Thoral, P. Thoral, } "Gaia: focus, straylight and basic angle", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99042D (1 August 2016); doi: 10.1117/12.2230763; https://doi.org/10.1117/12.2230763
ACCESS THE FULL ARTICLE
PERSONAL SIGN IN
Full access may be available with your subscription
 
Forgot your username?
Forgot your password?
No SPIE account? Create an account
or Institutional Sign In via Shibboleth
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $14.40
Non-members: $18.00 ADD TO CART
PROCEEDINGS
 17 PAGES
DOWNLOAD PDF + SAVE TO MY LIBRARY
SHARE
GET CITATION
< Previous Article
|
Next Article >
KEYWORDS
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top