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进行高精度的重力重复测量是为了捕捉震前由大面积的地壳形变及壳下深部物质迁移所引起的重力值变化,要有较高的观测精度。但是外界温度的变化引起观测值的漂移,影响了观测精度。改正温度引起的漂移一般有两种作法:
The high-precision gravity measurement is to capture the change of gravity caused by large-area crustal deformation and deep-shell material migration before the earthquake. Therefore, it is necessary to have high observation accuracy. However, the change of the external temperature causes the observation value to drift, which affects the observation accuracy. There are generally two ways to correct drift caused by temperature: