IWAVE Structure and Basic Use Cases

Movie from Point Source.

The pulse in Figure 4 the derivative of a 5 Hz Gaussian; it is embedded in a space-time field via the iwave/trace/main/towed_array.x utility, and used as the RHS in the wave equation. The resulting field (starting from homogeneous Cauchy data) at 5.12 s is depicted in Figure 5.

wavelet
Figure 4. Derivative of 5 Hz Gaussian

framesrc
Figure 5. Acoustic potential field at 5.12 s, resulting from Gaussian derivative point source pulse located at x=12 km, z = 1.875 km.

In this case, the parameters passed to acd.x (in addition to the other required numerical parameters) are

           csq = ../csq_4layer.rsf
        source = ../wavelet12000.su
         movie = ../movieinit.rsf

The point source data are presented as SEGY traces, rather than as an RSF data file; the latter would in principle also be possible, but at the time of this writing RSF trace I/O is not enabled.

IWAVE Structure and Basic Use Cases