Suppressing constant frequency noise in seismic records

Details Suppressing constant frequency noise in seismic records Suppressing constant frequency noise in seismic records

1977-04-21

1978-08-01

Moskowitz, Nelson

Communications: electrical

Selective

Having electron beam device

340 155TD, 340 17R, 324 1, G01V 136

Patent

active

041046110

ABSTRACT:
A method and apparatus for removing a sinusoidal noise signal having constant amplitude and phase from a seismic signal. The noise signal is continuously monitored to detect its phase and zero crossing of the noise signal to generate first and second trigger signals. The trigger signals are used to control the recording of seismic signals resulting from consecutive firings of a seismic source. Then, depending upon the polarity of the seismic source, the recorded signals are either added or subtracted to remove the unwanted noise signal.

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