If you have your own subroutine for xvst, you may want to make changes
to fit the format of dc_xvst.F.
If you want to study the drift time distribution related issues, you
may not want to create these distribution with xvst choice #3 in recsis
because it truncate the spectra.
To build the new sslt, you may want make a copy of trk/sdabgrid.inc
for now. I moved it from trk/ to include/. But you will not see it
until next build.
The xvst choice #4 create the same (similar) chi2 distribution for negative
and positive tracks. I was confused earlier because those events triggered
by a positive track.
If you have any problems with this program, please let me know.
Regards,
Liming
PS. I built the program on SunOS and it works.