There are multiple ways to demonstrate the data from the various runs from the Velador. I choose to plot the spot in each position of the pipe as it strikes the CCD using the co-ordinates of the CCD as viewed from the front. ie the side the light hits the CCD.
This plot is from 9-23-04. Close to the Autuminal Equinox. Consider for example the impact sites 1 and 7. 1 is when the pipe is N - S and the CCD is in the North facing South. 7 represents the N - S orientation but the CCD is in the South facing North. All of the other numbers correspond to the position of the pipe and consequently the CCD.
This plot is from Aug 23 2004. Here the pipe was turned a bit past North after the first revolution of the pipe. the curve continues on shifted a bit to the left.
Nov 2003
9-21-2004 the plot above and below are from the same run. the above plot is the first revoution of the pipe and the plot below is the second turning of the pipe. Each sequence of 260 degrees takes about 10 minutes.