60 years of Earth Tide observations in Strasbourg (1954-2014)

There is a tradition in gravity recording of Earth tides at Strasbourg which was initiated by Prof. Robert Lecolazet in the 50s. Since then, the surface time gravity changes have been measured locally using different kinds of gravimeters (spring, absolute and superconducting) at two different stations; first in the Seismological Observatory of Strasbourg for almost 13 years (1954-1967) and later on since the 70s at the J9 Observatory, 10 km far away from Strasbourg city. Over these years many kinds of improvements have been achieved in terms of instrumentation, of tidal potential developments and more specifically in terms of data analysis techniques, which have allowed obtaining some fundamental results