= MICROSCOPE
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{wiki=MICROSCOPE}
A satellite experiment testing the universality of <free fall>. Electrostatic control keeps test masses made from titanium and platinum alloys on matched orbital motion; the required differential <forces> constrain composition dependence. A reference sensor uses masses of the same composition. The experiment tests the <weak equivalence principle>, rather than the full <strong equivalence principle>.<The MICROSCOPE mission: first results of a space test of the Equivalence Principle by Pierre Touboul and others>[2017 paper: differential electrostatic measurement and reference instrument]{ref}
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