MDM Trouble Report for 2016 Jan 11

Telescope: 1.3m
Observer(s): Halpern, Alford (Columbia)
Instrument: Templeton

Problem(s) Encountered:
The old problem that we have diagnosed as a probable motion
of the MIS guide probe mirror is recurring.  It is manifest
as a diagonal jump in the image by about 4 arcseconds.
Tonight, it occurred three times in a span of 2.5 hours.
In addition, there is a slow drift of the image in the
same direction, but perhaps less than in previous years.
Following discussions with Eric and Mark Wagner last
summer, it seems that this can't be fixed without a major
redesign of the guide probe mechanism.

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Submitted on 2016 Jan 12 [7:00:26]