For usual air simulaion
ln -s atmos.inp-ForAir  atmos.inp
ln -s atmos.GLB-ForAir  atmos.GLB

For special case for GencolLike
ln -s  dpmjet.inp   atmos.inp
ln -s  dpmjet.GLB   atmos.GLB



sigxAbysigxp: 
sigxp (mb) (xp collision) x=K (pi) p
sigxA (mb) (xA collision) A=2,4,...
table contains.
sigxp   A    sigxA/sigxp 

