| Issue |
EAS Publications Series
Volume 45, 2010
GAIA: At the Frontiers of Astrometry
|
|
|---|---|---|
| Page(s) | 127 - 132 | |
| DOI | https://doi.org/10.1051/eas/1045022 | |
| Published online | 15 February 2011 | |
C. Turon, F. Meynadier and F. Arenou (eds)
EAS Publications Series, 45 (2010) 127-132
Global Sphere Reconstruction in the Astrometric Verification Unit
Osservatorio Astronomico di Torino, via Osservatorio 20,
10025 Pino Torinese ( TO), Italy
e-mail: abbas@oato.inaf.it
The Gaia space satellite will perform absolute astrometry, aiming at the definition of a global astrometric reference frame at visual wavelengths. Within this reference system, it will be very difficult to identify possible errors in the measurements or in the data reduction process that brings about the definition of the final catalogue. The Gaia Data Processing and Analysis Consortium (DPAC) has established an Astrometric Verification Unit (AVU) to verify crucial steps in the baseline data processing chain and report on any significant difference. This process is essential in order to guarantee a high quality catalogue to the larger scientific community. We describe here the global sphere reconstruction (GSR) component of AVU hosted by the Italian data processing centre at Torino (DPCT).
© EAS, EDP Sciences 2011