After having read the WBS data with YODAT, you can get a light curve of the
count rate (counts/0.5 sec) of GRS-PC13, PC14, PC15, PC16, PC23,
PC24, PC25 or PC26 with UTPLOT.
This works in a similar way to PLOT_GRSPCL.
IDL> plot_grspch,index,data,pc=[13,14,15,16,23,24,25,26]