Feature/eih #175
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Feature/eih #175
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This pull request introduces the Einstein-Infeld-Hoffmann (EIH) equations into Tudat, which are a first-order post-Newtonian expansion of the relativistic acceleration acting on a set of interaction point masses. This model is typically used in the dynamics of the solar system (e.g. ephemerides). The code includes a complete analytical formulation of the acceleration partials for the EIH accelerations.
As one of the unit tests, position observables for Venus are generated from INPOP, and we then fit a dynamical model to them using (i) EIH and (ii) Newtonian point-mass interactions for a period of 25 years gives: