Method of seismic exploration

Details Method of seismic exploration Method of seismic exploration

1975-10-09

1977-08-16

Moskowitz, Nelson

Communications: electrical

Selective

Having electron beam device

340 17R, 181113, 181139, G01V 114, G01V 136

Patent

active

040429105

ABSTRACT:
A method of suppressing noise trains that develop from harmonics of a vibrator-type sweep signal. It includes the step of generating a plurality of such sweep signals in series and with the phase of each succeeding sweep signal being shifted relative to the previous one by a predetermined phase angle which is a fraction of 2.pi.. The generated signals are separately recorded and transformed by inverse phase shifting before being added or stacked in a conventional manner.

REFERENCES:
patent: 3185985 (1965-05-01), Masterson et al.
patent: 3221298 (1965-11-01), Burns
patent: 3259878 (1966-07-01), Mifsud
patent: 3288243 (1966-11-01), Silverman
patent: 3332512 (1967-07-01), Sundt
patent: 3375896 (1968-04-01), Beddo
patent: 3786409 (1974-01-01), Sorkin
patent: 3895343 (1975-07-01), Farr

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