No abstract

The orbit of a free-flying test mass having differing inertial and gravitational masses relative to a reference mass obeying the equivalence principle (EP), depends on the EP-violation e as well as on the release conditions. For every orbit a release error does exist which compensates for the EP effect. The secular term in the relative distance of the masses (due to orbit period changes) is also dependent on a combination of e and release errors in a non-separable way.

No abstract

Some remarks by Heinrich Hertz on the nature of inertial and gravitational mass as seen in the context of his scientific work and historical background.

This is a report on the work done of a rather informal working group set up during the Phase A studies to suggest suitable materials for the test masses of the differential accelerometers for the ESA STEP-M3 mission. The most important work was done regarding theory by Thibault Damour (IHES, Paris) and for test-mass design by Nick Lockerbie (Strathclyde University, UK). Valuable ideas contributed by T Quinn, P Fayet, H J Paik, A Bernard and P Touboul are acknowledged.