-----------------------------
			TRACKS connected to a vertex 
			-----------------------------
ntv .... # of tracks connected to a vertex
			**** Arrays of dimension NTV *******
IV(ntv)  ....... Vertex # for the given track
TRKNUMV(ntv) ... track # in the original DTFS
CURV(ntv) ...... curvature
PHIV   ......... Phi-angle
COTV   ......... Cotan Theta
PXTV   ......... PX
PYTV   ......... PY
PZTV   ......... PZ
PMODV  ......... PMOD
LENV   ......... track length