The astrometric core solution for the Gaia mission. Overview of models, algorithms and software implementation

18 Dec 2011Lennart LindegrenUwe LammersDavid HobbsWilliam O'MullaneUlrich BastianJosé Hernández

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 satellite attitude and optical instrument... (read more)

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