Measurement of the signal to noise ratio in seismic profiling |
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| Authors: | Kees Rutten Mathée Valeton Theo van Grunsven |
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| Institution: | (1) Vening Meinesz Laboratorium, University of Utrecht, Netherlands |
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| Abstract: | The measurement of the signal to noise ratio in continuous seismic profiling systems is carried out by means of a small general purpose digital computer equipped with an analog to digital converter. The computer is programmed to compute and compare the power spectrum of a sample of noise to the power spectrum of a sample of noise plus an echo. Power spectra of some twenty to fifty shots are averaged to yield reliable estimates of the signal to noise ratio as a function of frequency. The observed spectra agree well with spectra calculated from signals measured near to an air-gun. This measurement of signal to noise ratio as a function of frequency provides unambiguous information for the adjustment of the necessary band-pass filter thus improving the operation of a continuous seismic profiler. |
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