Due to problems with the recently rebuilt and re-installed alt drive, science operations are canceled for Saturday night, Aug 23 (affecting PU02 and UW06). Science operations on Sunday night, Aug 24 (PU02 and UC02) are also definitely in jeopardy but are still a possibility. Observers for those programs should stay in contact with APO staff over the weekend to monitor the situation. As the source of the alt drive problem is not yet definitively diagnosed and the azi drive has yet to be tested, it is also possible that the shutdown will extend beyond the weekend. Potentially affected programs (JH03 and UC03 at least) should also monitor the situation and look for further updates. Ed Turner APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 689 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO