A direct global solution for the Gaia data reduction problem
H.-H. Bernstein (ARI)
Abstract:
One of the main goals of GAIA is the construction of a rigid, almost bias-free sphere on the sky,
represented by a large and dense number of stars on the microarcsecond level. Such a sphere has many applications
in astronomy and astrophysics. The core of the construction is the estimation of the astrometric parameters
of all stars in question together with the attitude, the needed satellite calibrations and the estimation of a
certain number of unknowns describing the orientation and some physical properties of the whole sphere.
A lot of considerations on this subject resulted in the 'Astrometric Global Iterative Solution' (AGIS) as the
currently used method. Some considerations on theoretical and practical aspects of AGIS lead to the quest
for an alternative approach. The Direct Global Solution is a noniterative, exact solution of the GAIA sphere
reconstruction problem.
Thu, 12.7.07, 11:00
Gaia: Detailed First Look
M. Biermann (ARI)
Thu, 19.7.07, 11:00
Dynamical evolution of planets and planetesimals
O. Furdui (ARI)
Thu, 26.7.07, 11:00
Digitalisierung des Palomar-Leiden Surveys: Probleme und
Ergebnisse
