Appeal No. 97-2120
Application No. 08/226,164
12) of claims 3 through 6, 9, 11 and 12.
The disclosed invention relates to a method and apparatus
for enhancing a seismic reflection signal received from a
land-vibrator seismic system by passing the harmonics
associated with the land-vibrator seismic system and the
reflection signal through an inverse filter to yield a pulse
compressed seismic signal which includes the harmonic energy.
Claim 11 is illustrative of the claimed invention, and it
reads as follows:
11. A method of enhancing a seismic reflection signal
received from a land-vibrator seismic system, which includes a
baseplate coupled to the earth to induce seismic waves of
varying frequencies, into the earth, said method comprising:
(a) recording a correlation operator (CO) signal which is
representative of the actual motion of said baseplate and
includes harmonics associated with said land vibrator system;
(b) determining an inverse filter responsive to said CO
signal, said inverse filter having a pass-band that includes
harmonics which are associated with said land vibrator seismic
system; and
(c) passing said seismic reflection signal through said
inverse filter to yield a pulse compressed seismic signal
which includes harmonic energy injected into the earth by said
land-vibrator seismic system.
The reference relied on by the examiner is:
Martinez 4,646,274 Feb. 24,
1987
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