MDM Trouble Report for 2014 Mar 13 Telescope: 1.3m Observer(s): Shappee (OSU) Instrument: CCDS Problem(s) Encountered: Problems (there are 2): 1) Prospero repeatedly failed scripts saying that: Once telescope is slewing to next Object hit > Moving mirror IN and turning on Xe lamp Mirror command sent, please wait for completion... Mirror MOVING Mirror MOVING Error: Command returned error ERROR: MDM TCS link not enabled objsetup script aborted on error, please correct and try again I would then (found in an error report by Gisella deRose 2 years ago) telescope stop telescope start However prospero would still not work. I then also tcinit and then tcstatus and then prospero would work for a while. I went through this circle 3 or 4 times then the problem stopped happening. I am thinking about just rebooting everything tomorrow before the night begins. 2) There was pretty bad nodding again tonight. It first happened at: HA=+00:58:25 Dec=-04:57:29 The bright star was jumping ~arcmin size jumps between the 0.1s exposures on the acq camera. I grab my phone to take a video in case it is useful in diagnostics. I did not catch it in the large jumps, but I did succeed in catching smaller (~20 ) jumps. I have sent the video to Eric in case it is useful. I then went to our science target. It was tracking fine for about 20 min but then nodding started on this object as well. Guiding was lost. It occurred at: HA = +01:26:27 Dec=-04:08:06 I then repointed to our object after about 5 min. The source then tracked for 40 min, some nodding might have been present at the beginning but it was not bad by the end of the 40 min. ------------------------------ Submitted on 2014 Mar 14 [5:54:49]