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A general relativistic scenario is utilized to build a non-perturbative model, in Schwarzschild metric, for the representation of observed angles among star pairs. This model is then applied to an end-to-end simulation of the GAIA satellite , a concept for global astrometry within the 2000+ scientific program of the European Space Agency. GAIA is expected(More)
—Gaia is an ambitious space mission of the European Space Agency which will chart a three-dimensional map the Milky Way to study the composition formation and evolution of our Galaxy. Our research team is developing the AVU-GSR verification module, aiming to obtain a reconstruction of the celestial sphere using a subset of GAIA observations. The authors(More)
Modern astrometry is based on angular measurements at the micro-arcsecond level. At this accuracy a fully general relativistic treatment of the data reduction is required. This paper concludes a series of articles dedicated to the problem of relativistic light propagation, presenting the final microarcsecond version of a relativistic astrometric model which(More)
Gaia is a 5-year ESA (European Space Agency) cornerstone mission launched at the end of 2013. Its main goal is the production of a 5-parameter astrometric catalogue (i.e. positions, parallaxes and the two components of the proper motions) at the micro-arcsecond level for about 1 billion stars of our Galaxy by means of high-precision measurements. The main(More)
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