## NAME

           x_setup  -  Determine  Pairs  of Legs that need Cross-Over
           Checking

## SYNOPSIS

           x_setup [ -Llegfile ] [ -Rwest/east/south/north ]

## DESCRIPTION

           x_setup scans the gmtindex.b file that  contains  informa
           tion  on  which  legs  occupy  each  1 by 1 degree bin and
           reports all the pairs of legs that may overlap. Each  pair
           is  only  reported once, even if the two legs involved are
           found in other bins also.

           -L     Only report pairs where at least one  of  the  legs
                  are present in the legfile.

           -R     The region of interrest. [Default is world]

## The -L option is useful when one wants to check out a handful of

           new cruises. Obviously we
           only need to compute COEs for the pairs that  involve  one
           or  two  of  the new cruises, since all the other combina
           tions have already been done.

                               15 Oct 2001                 x_setup(l)