, or the action of undoing the effect of a previous convolution
process. The convolution of the Earth
's impulse response R
is the set of *reflection coefficients
characteristic of particular layered strata) with a wavelet W
results in the observed seismic
, such that S
. A spike signal (Dirac function
) (δ) at time zero is the convolution of the wavelet W
with some designed operator D
such that D
= δ. Thus if the operator D
is applied to the seismic trace S
can be obtained: D×S
. (It should be noted that convolution of a spike function δ leaves the function unaltered, hence δ×R
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