Whatever the solution is will require another shutdown. By November 15, expect to have everything together again, and all can be retuned. Also, reduce altitude servo impulses down by a factor of two, to reduce the 20 Hz problem. Power sources for all microprocessor controllers on the telescope were switched from utility power to uninterruptable power supplies. Calibration lamps are now pointing down on the primary mirror cover, allowing calibrations to be done in real time without opening and closing the shutter covers.
Capability exists for finding the position angle that puts such a star in the guider.
There now exists a slit-viewing camera to be installed on DIS by the end of the month. Will create FITS images which can be moved over the net by anonymous ftp. DSC is now back to Fermilab for a variety of upgrades and repairs to electronics, in particular to remove spurious charge effects. All orders must be in by the end of the year. Funds from UW and FNAL is a possibility to pay for this.