MDM Observatory 2.4m Telescope Observing Report for 2017 Jan 02

Observer(s): Halpern, Li
Institution(s): Columbia

Instrument: OSMOS

Worked for 1 hours (off and on through the night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   High Humidity all night.
   Beg: Seeing 1.4 arcsec, Cirrus, Winds Light & Variable
   Mid: Cirrus, Winds Light & Variable
   End: Seeing 1.4 arcsec, Clear, Winds Light & Variable

Observing Summary:

We uses a lot of the dry nitrogen clearing condensation
from the 4K window.  About 400 psi remains.  There still
is some pattern on the CCD that doesn't go away.  If there
is time it may be worth looking at the CCD dewar window.
The MIS flat lamp was intermittently off, but working now.
The dome encoder behaved correctly.  

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Submitted on 2017 Jan 3 [3:40:52]