Appeal No. 97-2120
Application No. 08/226,164
The ground force signal 34 and a reflected signal 32 detected
by a geophone are simultaneously recorded by a recorder 38
(column 3, lines 20 through 25). In correlator 40, the ground
source signal 34 is correlated with pilot sweep signal 42 to
produce output trace 44, and the reflected signal 32 is
correlated with pilot sweep signal 42 to produce output trace
46 (column 3, lines 26 through 30). Martinez indicates that
“[o]ther signal pulses may be employed for this purpose
instead of pilot signal 42, such as, for example, ground force
signal 34 itself” (column 3, lines 61 through 63). The output
traces 44 and 46 are thereafter subjected to the same standard
processing technique to generate respective output traces 52
and 62 (column 3, line 66 through column 4, line 1). “A
typical standard processing technique involves what is known
as ‘spiking deconvolution’” (column 4, lines 12 through 19).
If this technique is used in Martinez, then “spiking” inverse
filtering is used in the processing of the traces 44 and 46 to
produce respective traces 52 and 62. “By means of inverse
filter 54 trace 52 is time reversed to generate a correction
function 56" (column 3, lines 33 through 35), and “[f]inally
correcting signal 56 and processed data trace 62 are convolved
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Last modified: November 3, 2007