The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1977
Filed:
Sep. 29, 1975
Lincoln A Martin, Altadena, CA (US);
Geophysical Systems Corporation, Pasadena, CA (US);
Abstract
A method of carrying out vibratory seismic operations with the object of minimizing correlation noise lobes, comprising, repeating a vibratory source a plurality of times each with a different sweep, having different terminal frequencies, correlating each received signal with its corresponding sweep, and stacking the resultant correlograms. The range in terminal frequencies for the plurality of sweeps should preferably be in the range of one octave or more. Another method of operation is to vary the time durations of the successive sweeps, preferably over a range of 2 to 1, and correlating the received signals and sweeps, and then stacking. In a third method of operation both the time durations and the terminal frequencies are varied. The successive repetitions of the source can be at the same source point and the results straight stacked, or they can be at different independent source points and the results CDP stacked.