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Time transfer functions as a way to validate light propagation solutions for space astrometry

Bertone, Stefano; Crosta, Mariateresa; Vecchiato, Alberto +3 more

Given the extreme accuracy of modern space astrometry, a precise relativistic modeling of observations is required. Concerning light propagation, the standard procedure is the solution of the null-geodesic equations. However, another approach based on the time transfer functions (TTF) has demonstrated its capability to give access to key quantitie…