Applications of direct and parametric methods in geophysical investigations |
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| Authors: | S G Dolgikh G I Dolgikh |
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| Institution: | (1) Il’ichev Pacific Oceanological Institute (POI), Far East Division (FED), Russian Academy of Sciences (RAS), Baltiiskaya ul. 43, Vladivostok, 690041, Russia |
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| Abstract: | Using data of a 52.5 m laser strainmeter of the non-equal-arm type, the paper compares direct and parametric methods of extracting tidal harmonics, some modes and overtones of the Earth’s free oscillations, and microseisms. It is established that maximums identified in spectra of laser strainmeter records by direct methods of measurement are a few orders higher compared to amplitudes revealed by parametric methods. |
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