Figure a shows a synthetic shot gather for a 1D medium.
This gather is corrupted with internal multiples only. In Figure
b, we display the internal multiple model obtained
using the CFP approach ().
This internal multiple model is perfect and could be directly subtracted
from the data in Figure a. Note that the amplitude
of the internal multiples is significantly less than the amplitude
of the primaries, making the 312#312-norm unsuitable for estimating
the shaping filters. Figure displays the
histograms of both the data and the internal multiples. The narrow
peak of the noise indicates that the 1#1-norm should be used.
inter
Figure 6 (a) A synthetic shot gather
infested with internal multiples. (b) The internal multiples model
obtained using the CFP technology. This model matches the
internal multiples in (a).
histodata
Figure 7 Histograms of the input
data (Figure a)
and of the noise (Figure b).
The density function of the noise is much narrower
than for the data. The 1#1-norm should be used to estimate the signal.