
The programs in this directory are used to do broadband
calculations.

In most cases the starting point is to produce
a *.fft file containing the spectrum of the
waveform. The *.fft file has a simple format
consisting of frequency-amplitude pairs.
The amplitude is a complex number.

`makets'
synthesizes such a file.
It requires an input file *.inp containing parameters
which define certain canned wavelets.

'makespec'
is a short fortran program that produces a uniform
spectrum. It provides an alternative to `makets' when
the spectrum is simple.

`stack'
reads a file *.tim indicating the times
when results are needed and whether a
depth-stack, range-stack or snapshot result is
desired. It then reads the *.fft file and uses
it to weight the corresponding *.shd files to produce
the results. Each *.shd file is presumed to contain
the complex pressure field for a frequency in the
*.fft file.

Data from the first range contained in the SHD files
is used for depth stacks.

Similarly, data from the first depth contained in the
SHD files is used for range stacks.




