Other
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..248..278m&link_type=abstract
A Giant Step: from Milli- to Micro-arcsecond Astrometry, Proceedings of the International Astronomical Union, IAU Symposium, Vol
Other
Astrometry, Methods: Data Analysis
Scientific paper
On a daily basis the Gaia telemetry data (some 30 GB) must be stored and treated in order to reconstruct the actual observations. This initial data treatment processes all newly arrived telemetry and various pieces of auxiliary data. The first part of the process is merely a reformatting to create raw objects for permanent storage in the raw data base (some 40 TB at the end of the mission). The next part is to analyze the data to derive initial values for the observables, e.g. transit times and fluxes, producing intermediate objects. Finally, the intermediate objects are matched with sources in the data base, linking all the observations of a given source.
To check the initial data treatment algorithm we use simulations of the telemetry stream provided by GASS, the Gaia System Simulator. GASS simulates astrometric, photometric and radial velocity data, using models of the satellite and on-board instruments, as well as the models of different of objects observed by Gaia (stars, galaxies, solar system objects, . . .). On the other hand, the initial data treatment allows us to validate the data generated by GASS, which are used too to check other algorithms like the First Look or the Astrometric Global Iterative Solution (AGIS).
Catañeda J.
Fabricius Claus
Masana Eduard
Portell Jordi
Torra Jordi
No associations
LandOfFree
Simulating Gaia observations and on-ground reconstruction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Simulating Gaia observations and on-ground reconstruction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulating Gaia observations and on-ground reconstruction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1323213