A GENERAL RELATIVISTIC MODEL OF LIGHT PROPAGATION IN THE GRAVITATIONAL FIELD OF THE SOLAR SYSTEM: THE DYNAMICAL CASE F. de Felice 1

Modern astrometry is based on angular measurements at the microarcsecond 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 modelthatenablesustotracebackalightpathtoitssourcethroughthenonstationarygravitationalfieldofthemoving bodiesinthesolarsystem.Thepreviousmodelisusedastestbedfornumericalcomparisonswiththepresentone.We also test different versions of the computer code implementing the model at different levels of complexity to start exploring the best trade-off between numerical efficiency and the microarcsecond accuracy that needs to be reached. Subject headingg astrometry — gravitation — reference systems — relativity — time Online material: color figures