It is significant for establishing gravity datum to construct precise gravity solid tidal model,A simple method with relatively low performance is to interpolate tidal parameters from the global gravity solid tide mod...It is significant for establishing gravity datum to construct precise gravity solid tidal model,A simple method with relatively low performance is to interpolate tidal parameters from the global gravity solid tide models.A competitive approach is to determine local gravity solid tidal model by harmonic analysis using long-time serial gravity observations.In this paper a new high-precision gravity solid tidal model for Precision Gravity Measurement Facility is estimated from two co-site gravimeters in the cave laboratory using modern international standard data processing techniques,whose accuracy is evaluated further by comparing with previous publications.The results show that:(1)the determined gravity solid tidal models from two co-site gravimeters are in good agreement with each other,of which the maximum differences for amplitude factors and phase delays don’t exceed 0.01700%and 2.50990°,respectively.(2)the performance of the obtained gravity solid tidal model is 0.00411 for amplitude factors and 0.24120°for phase delays,which is a little better than that of previous publications using superconducting gravity data from Wuhan station.(3)our results and methods are corrective and effective.(4)our model is tiny different from that provided by Wuhan station,which implies that it is necessary to construct a gravity solid tidal model for Precision Gravity Measurement Facility,rather than just adopting existing models at Wuhan station.Our results are helpful in realizing the goal of Precision Gravity Measurement Facility.展开更多
1 Overview of the precision gravity measurement facility.The Precision Gravity Measurement Facility (PGMF) is one of China’s major national scientific and technological infrastructures. With a total investment of 859...1 Overview of the precision gravity measurement facility.The Precision Gravity Measurement Facility (PGMF) is one of China’s major national scientific and technological infrastructures. With a total investment of 859 million RMB and a five-year construction period, the project was supervised by the Ministry of Education of China and the Hubei Provincial People’s Government, and jointly established by the Chinese Academy of Sciences (CAS) and the Wuhan Municipal People’s Government. The application was initiated in 2010, approved in 2015, and construction began in 2018. Huazhong University of Science and Technology, China (HUST) serves as the legal entity, in collaboration with the CAS Innovation Academy for Precision Measurement Science and Technology, China University of Geosciences (Wuhan), and Sun Yat-sen University, China (Luo et al., 2016).展开更多
基金supported by the National Natural Science Foundation of China(Grant No.41974014)the Open Fund of State Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University(Grant No.19P01)
文摘It is significant for establishing gravity datum to construct precise gravity solid tidal model,A simple method with relatively low performance is to interpolate tidal parameters from the global gravity solid tide models.A competitive approach is to determine local gravity solid tidal model by harmonic analysis using long-time serial gravity observations.In this paper a new high-precision gravity solid tidal model for Precision Gravity Measurement Facility is estimated from two co-site gravimeters in the cave laboratory using modern international standard data processing techniques,whose accuracy is evaluated further by comparing with previous publications.The results show that:(1)the determined gravity solid tidal models from two co-site gravimeters are in good agreement with each other,of which the maximum differences for amplitude factors and phase delays don’t exceed 0.01700%and 2.50990°,respectively.(2)the performance of the obtained gravity solid tidal model is 0.00411 for amplitude factors and 0.24120°for phase delays,which is a little better than that of previous publications using superconducting gravity data from Wuhan station.(3)our results and methods are corrective and effective.(4)our model is tiny different from that provided by Wuhan station,which implies that it is necessary to construct a gravity solid tidal model for Precision Gravity Measurement Facility,rather than just adopting existing models at Wuhan station.Our results are helpful in realizing the goal of Precision Gravity Measurement Facility.
文摘1 Overview of the precision gravity measurement facility.The Precision Gravity Measurement Facility (PGMF) is one of China’s major national scientific and technological infrastructures. With a total investment of 859 million RMB and a five-year construction period, the project was supervised by the Ministry of Education of China and the Hubei Provincial People’s Government, and jointly established by the Chinese Academy of Sciences (CAS) and the Wuhan Municipal People’s Government. The application was initiated in 2010, approved in 2015, and construction began in 2018. Huazhong University of Science and Technology, China (HUST) serves as the legal entity, in collaboration with the CAS Innovation Academy for Precision Measurement Science and Technology, China University of Geosciences (Wuhan), and Sun Yat-sen University, China (Luo et al., 2016).
