INCHWORM, written by N. Elias II, is not part of the $\cal OYST\!ER\,$ software, but we document a few instructions here on how to use it.

To create a .inch file from a .con file, startup INCHWORM and then type inchworm inch1 /gemini/npoi/con/2003-03-15.con -dir. You can delete the inch1 object by typing inch1 delete.

Then open the file and go to Raw$\vert$ScanData, double click on sid 1, and go to Edit$\vert$De-glitch. In this widget deselect tuple (1,2,4) and (1,3,5), and then click on Find. Fix every glitch listed by double-clicking the glitch and then, judging by the plot, the laser which glitched. Select this laser (Calc) and click Fix. Note that lasers 2&4, as well as 3&5 are degenerate since they are 180 degrees apart. Also, lasers 2&5 and 3&4 are on the same side of the plate and should therefore move in the same way. You do not have to work on the glitches in sequence, but note that of course every fix will shift all laser values from current to end by that amount. Typically, there is up to a three count difference between calculated and predicted values of the glitch. 100 counts = 0.5 $\mu$m. Any notes can be entered into the INCHWORM log using View|Logs|InchwormLog.

After fixing all glitches, go to Average, (Re)create$\vert$ScanData, then Calculate$\vert$By Time, then Calibrate and then Done.

To prepare the motion group, go to Motion, )(Re)create$\vert$Go, Calculate, Calculate, Done, Done. To exit, go to File$\vert$Done.