Precise tidal measurements by spring gravimeters at the station Pecný

The repeated absolute gravity measurements with the FG5 No. 215 gravimeter at the observatory Pecný were used for computing calibration factors of the tidal gravimeters ASK 228 and LCR 137. From 3-day simultaneous measurements during tidal variations of about 2.5 μm/s2 the calibration coefficients were determined with a precision of 0.05%. The scales of the tidal gravimeters were determined from 28 absolute campaigns with the accuracy of 0.04%.