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Derivation the Correction of the Component of the Recorder and the Application of Hilbert Transformation to Calculating the Frequency Response of the Sensor
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  • Journal title : Geophysics and Geophysical Exploration
  • Volume 19, Issue 2,  2016, pp.84-90
  • Publisher : Korean Society of Earth and Exploration Geophysicists
  • DOI : 10.7582/GGE.2016.19.2.084
 Title & Authors
Derivation the Correction of the Component of the Recorder and the Application of Hilbert Transformation to Calculating the Frequency Response of the Sensor
Cho, Chang Soo;
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 Abstract
The validation of performance test for newly developed or old-used sensor is very important in the earthquake monitoring and seismology using earthquake data. Especially the frequency response of the sensor is mainly used to correct the earthquake data. The technique of the calculation of phase and amplitude with Hilbert transformation for earthquake data that is filtered with band limited frequency in time domain is applied to calculate the frequency response of the sensor. This technique was tested for the acceleration sensors, CMG-5T of 1g and 2g installed on the vibration table at the laboratory and we could obtain satisfactory result. Tohoku large earthquake in 2011 observed at the station SNU that has accelerometer, ES-T and seismometer, STS-2 operated by KIGAM was also used to test the field data applicability. We could successfully get the low frequency response of broad band sensor, STS-2. The technique by using band limited frequency filter and Hilbert transformation showed the superior frequency response to the frequency spectrum ratio method for noisy part in data.
 Keywords
Hilbert Tansform;frequency response;seismometer;
 Language
Korean
 Cited by
 References
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