After having read the WBS data with YODAT, you can get a light curve of the
ratio of GRS-PCi to GRS-PCj with UTPLOT.
For GRS-PCL1, you do the following:
MK_GRSPCL is a function for making a float array of GRS-PC11 and GRS-PC12 data. grspcl=fltarr(4,8*N), where N is the number of major frames. It takes two major frames to assemble a full set of WBS data. grspcl(0,*) is pc11 and grspcl(1,*) is pc12. For example, to ratio GRS-PC12 to GRS-PC11:
For GRS-PCL2, you can do a similar ratio. grspcl(2,*) is pc21 and grspcl(3,*) is pc22.