= Solution
First measure the generator’s spectrum, timing and propagation pattern on quiet records. If practicable, coordinate shutdowns or quiet acquisition windows; otherwise place source/receiver lines to reduce coupling to the noise source and use good ground coupling and adequate instrument dynamic range. Saturated channels cannot be repaired by a later filter.
Separate noise using its measured <frequency> and moveout: a band-pass/high-pass filter can reject <frequencies> below the useful seismic band, and an appropriate narrow notch can reject a narrow coherent component. Avoid deleting wanted low-frequency arrivals along with the generator noise. Dense spatial sampling enables <frequency>–wavenumber filtering or array methods to separate low-apparent-velocity surface noise from target arrivals. A reference sensor near the generator can support coherent-noise subtraction when the transfer is stable.
Repeated shots/sweeps and stacking improve the <signal-to-noise ratio> for uncorrelated noise; persistent coherent generator noise does not necessarily average down. Known-sweep <Vibroseis correlation> also helps reject unrelated noise. Verify the final processing against test gathers to ensure that real arrivals have not been mistaken for noise.
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