A more streamlined version of the WFS reduction software has been made by Anton Norup Sørensen (CUO). The routines are now entirely using IDL, and if no configuration changes are needed, the reduction of a number of images can be performed by a single command.
It was noted that some of the discrepant results found previously were probably due to the WFS mask not being adequately aligned with the pupil.
The analysis of the Wavefront sensor data has resulted in an initial estimate for the correction of the dominant astigmatism aberration against zenith angle. A report of the analysis has been produced "Analysis of WFS Measurements from the first half of 2004". Tests are currently been carried out during technical time to see if the predicted corrections are correct.