BART uses the Bartlett estimator to produce
an ambiguity surface. Required input is a covariance matrix
and a set of replica vectors. The replica vectors
are provided in the form of a 'SHD' file and the ambiguity
surface is written in that same format.
\begin{verbatim}
Files:
Name Unit Description
Input
*.SHD 20 SHaDe file
*.COV 21 COVariance file
Output
*B.SHD 25 SHaDe file for ambiguity surface
\end{verbatim}