Astronomy, space geodesy and fundamental physics experiments in space : present status and projects

Astronomy and Astrophysics – Astrophysics

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In the past, several geodetic space missions revealed to be excellent laboratories for some experiments of fundamental physics (e.g. detection of the Lense-Thirring effect using precise satellite orbits). Today, we note the emergence of an ambitious fundamental physics program in space, thanks to the scientific prospective of CNES or ESA. The proposals of measurements linked to the theory of gravitation were the first to appear during the nineties and the French projects MicroSCOPE and PHARAO the first to be selected. At present, the implication of specialists of fundamental astronomy and space geodesy in these projects is effective due to their know-how and their resources in key techniques such us : reference systems, orbital mechanics, and associated techniques (laser, high angular resolution, accelerometry, clocks...). We will review here the contribution of fundamental astronomy and space geodesy to some projects and missions dedicated to fundamental physics.

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