Abstract:Using the FG5 absolute gravimeter, absolute gravity values are determined at three base gravity sites in Lushan and one datum site in Jiujiang seismic station to determine the Lushan calibration baseline.Further, twenty-five sites are determined using seven CG-5 relative gravimeters with two return measurements. The results show that the accuracy of gravity values at all of the base sites is better than ±5.0 μGal.The application of FG5 absolute gravimeter along with several relative gravimeters to construct short calibration baselines is a new and modern approach which has scientific significance as well as economic value.