Abstract:Using least squares and iterative algorithms for 5 d simultaneous co-location comparison observations at Anqiu seismic station, we process the data of A10-057 absolute gravimeter, FG5-265 absolute gravimeter and superconducting gravimeter(iGrav). The final calibration factor factors of FG5-265 and A10-057 precision measurement iGrav-053 are -883.929 4 ns-2/V and -884.134 ns-2/V, respectively, and the calibration accuracy is 0.048 26% and 0.093 7%, which are better than 0.1%. At the same time, we compare the differences between the calibration work of FG5-265 and A10-057 in terms of various measurement indexes and the selected measurement logarithms on the calibration results, and exemplify the requirements of calibration factor for multiple scenarios, which finally proves that the A10 model absolute gravimeter has the capability of calibrating relative gravimeters and provides a reference for the subsequent calibration of relative gravimeters.