ANALYSIS OF LONG-TERM ABSOLUTE GRAVITY CHANGE
AT JIXIAN DATUM
1)61365 Troops of PLA, Tianjin 300140
2)Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052
3)Institute of Geodesy and Geophysics, CAS, Wuhan 430077
Abstract:The yearly rate of gravity change owing to elevation changes and underground material transfer were calculated using 10 years measurement results of absolute gravity and GPS at Jixian datum. The results show that the technology of monitoring tiny vertical crust movement using highprecision absolute gravimeter is rapid, efficient and no error accumulation. In addition, the loss of underground water of Jixian is serious in recent years.