The astrometric core solution for the Gaia mission. Overview of models, algorithms, and software implementation
The astrometric core solution for the Gaia mission. Overview of models, algorithms, and software implementation
Context. The Gaia satellite will observe about one billion stars and other point-like sources. The astrometric core solution will determine the astrometric parameters (position, parallax, and proper motion) for a subset of these sources, using a global solution approach which must also include a large number of parameters for the …