A NEW TEST OF EARTH TIDE MODELS IN CENTRAL-EUROPE

New improved ocean tide models allow a corresponding improvement in oc ean tide loading computations, During recent years various groups have made more accurate tidal gravity observations in central Europe, usin g gravimeters carefully calibrated on various calibration lines. This progress with tidal gravity measurements and ocean loading corrections now allows a more comprehensive test of body tide models than was pos sible previously. It is shown that the O-1 and M(2) gravimetric factor s, corrected using the latest ocean tide models, are very consistent b etween the sites, despite the different instruments and gravity calibr ation lines that have been used. These observations allow constraints to be put on the anelasticity of the Earth at tidal frequencies. The c orrected gravimetric factors are consistent with recent model results far both the elastic PREM model and with alpha less than or equal to 0 .09 for an anelastic PREM model with the Q for dissipation in shear va rying as frequency to the power alpha.