INSTRUMENT SITE CALIBRATION CAN NOT BE REPLACED
BY DATA PROCESSING
Earthquake Administration of Fujian Province, Fuzhou 350003
Abstract The paper analyzed the relative calibration and absolute calibration of four component borehole strain observation. By the theorem “sum of vertical components must be equal”, we can only obtain the ratio of site scale value of 3 sensors and the sensor which is as a constant element, but we cannot get site scale value, so it cannot solve relative calibration. By the relationship between tides and component strain observation value, the coupling coefficient can be calculated, but calibration of the elastic parameters cannot solve the problem of the absolute calibration of strain.
Key words :
four-component borehole strainmeter
scale value
relative calibration
absolute calibration
data processing
Received: 23 October 2012
Published: 16 August 2013
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