Abstract：This article selects the continuous observation data of three different models of gravimeters(gPhone, DZW, and GS-15) observed at the same site of Jixian seismostation throughout 2022, studies the response of different types of instruments to environmental noise, calculates the gravity noise levels of the three types of gravi meters, calculates the seismic noise levels in the seismic frequency band(200-600 s), and compares them with the seismic noise levels of gPhone gravimeters nationwide. The research results indicate that: 1) when the frequency is below 10-3 Hz, deducting solid tide and pressure correction can significantly improve the level of gravity noise; 2) The gravity noise levels of different instruments at the same station are different. The background noise level of the gPhone gravimeter is lower than that of the DZW gravimeter and GS-15 gravimeter, with an SNM value of 3.355; 3) The average noise level in the seismic frequency band of the gPhone gravimeter nationwide in 2022 is 5.418, while the average noise level at Jixian station is 3.465, which is lower than the national noise level. The research results can provide reference for the research and application of three types of gravimeter observation data.
LI Xiang,JIANG Ying,LIU Ziwei et al. Comparison of Background Noise Level Based on gPhone, DZW and GS-15 Gravimeters at Jixian Seismostation[J]. jgg, 2024, 44(5): 528-533.
