1. Geophysical Survey Center of China Geological Survey, Langfang 065000, China 2. Technology Innovation Center for Earth Near Surface Detection, China Geological Survey, Langfang 065000, China 3. School of Geophysics and Information Technology,China University of Geosciences (Beijing), Beijing 100083, China 4. Langfang Natural Resources Comprehensive Survey Center,China Geological Survey, Langfang 065000, China
As an important part of gravity investigation, the performance tests of gravimeters are required throughout field surveys. In these tests, mean squared error (MSE), accuracy, and root mean squared error (RMSE) are commonly employedto quantitatively describe the test results. The comparison of the theoretical equations for dynamic and consistency tests in specifications on geological surveys, petroleum, and measurement reveals a pronounced confusion in the usage of MSE, accuracy, and RMSE. This issue is observed in the consistent equations forconsistency testsin these specifications. Through investigations into the equations used in the dynamic and consistency tests inthe threespecifications, this study analyzed the differences between mean MSE and RMSE, elucidated the normativity of RMSE relative to MSE, and determined the applicablerange of RMSE. To avoid confusion, it is recommended that accuracy be used for qualitative expression and RMSE for quantitative expression in these specifications.
Ministry of Natural Resources of the People’s Republic of China. The standard for regional gravity survey:DZ/T 0082—2021[S]. Beijing: Geological Publiching House, 2021.
Ministry of Land and Resources of the People’s Republic of China. DZ/T 0004—2015 The technical specification for gravity survey(1:50 000)[S]. Beijing: Geological Publishing House, 2015.
National Energy Bureau of the People’s Republic of China. SY/T 5819—2016 Technical specifications for land gravity and magnetic surveys[S]. Beijing: Petroleum Industry Press, 2017.
Ministry of Land and Resources of the People’s Republic of China. DZ/T 0171—2017 Large-scale gravity survery specification[S]. Beijing: Geological Publishing House, 2017.
State Administration for Market Regulation, Standardization Administration of the People’s Republic of China. GB/T 17944—2018 Specifications for the dense gravity measurement[S]. Beijing: Standards Press of China, 2019.
State Administration for Market Regulation, Standardization Administration of the People’s Republic of China. GB/T 20256—2019 Specifications for the gravimetry control[S]. Beijing: Standards Press of China, 2019.
Su M X, Sun H L, Zhao Z J, et al. The application of large and medium scale gravity measurement to the Gaoer Banner half-concealed Ag-Pb-Zn polymetallic deposit,Inner Mongoli[J]. Geophysical and Geochemical Exploration, 2018, 42(2):292-302.
Li J C, Cao P J, Wang Z H, et al. Application of gravity exploration in the study of basement structure development in Pingdu area[J]. North China Geology, 2021, 44(1):75-80.
Gao Y H, Shen J H, Su Y J, et al. Application of gravity survey on the fracture and tectonic units in littoral region of Weifang,Shandong Province[J]. Geological Survey and Research, 2019, 42(1):72-76.
Song X F, Cao T, Huang Z, et al. Application of gravity survey in investigation and evaluation ofpotassium salt resources in salt basin in Mengban area,Yunnan Province[J]. Journal of Yunnan University:Natural Sciences Edition, 2023, 45(S1):64-72.
Dang Y M, Jiang T, Yang Y X, et al. Research progress of geodesy in China (2019—2023)[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(9):1419-1436.
doi: 10.11947/j.AGCS.2023.20230343
Zhang H, Zhu W, Zhang S. Refinement of regional quasigeoid based on spectral combination of gravity field models[J]. Science of Surveying and Mapping, 2023, 48(4):54-59.
Chang X P, Chen L, Zhang X, et al. Calculation and analysis of zero drift rates of gravimeters in two-way reciprocal observations based on different specifications[J]. Geophysical and Geochemical Exploration, 2023, 47(5):1307-1315.
GeneralAdministration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China. JJF 1001—2011 General terms in metrology and their definitions[S]. 2012.
Shang L Z, Zhang B S, Huang N. Comparative analysis of instrument performance test of LCR-G and CG-5 gravimeter[J]. Journal of Green Science and Technology, 2017, 19(4):137-139.
Zhao Y F, Zhu Y Q, Liang W F, et al. Study on the characteristics of burris gravimeter[J]. Seismological and Geomagnetic Observation and Research, 2018, 39(2):178-185.
Xuan S B, Wang J, Li J, et al. Performance analysis on a new generation of the CG-6 gravimeter[J]. Journal of Geodesy and Geodynamics, 2018, 38(1):5-7,13.
Tao Z M, LiangL Z, Qin P, et al. Researchoninclinationanglemeasurementtechnologyappliedto high precision digital gravimeter[J]. Equipment for Geotechnical Engineering, 2020, 21(5):18-22.
Gao P, Li Z T, Yu F D, et al. Quick processing of static test data of CG-5 gravimeter and calculation of the parameter DRIFT using Excel[J]. Geophysical and Geochemical Exploration, 2019, 43(1):209-214.
He Z T, Chen H J, Ren X B, et al. Performance test of Burris70 and Burris73 relative gravimeters[J]. Geomatics Technology and Equipment, 2012, 14(3):60-61,59.
Ministryof Housing and Urban-Rural Development of the People’s Republic of China. CJJ/T 8—2011 Code for urban survey[M]. Beijing: China Architecture & Building Press, 2012.