MDM Observatory 2.4m Telescope Observing Report for 2015 Nov 25

Observer(s): Songyoun Park
Institution(s): Seoul National University

Instrument: OSMOS

No Observing (see comments below)
Bad weather most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   High Humidity all night.

Observing Summary:

It was cloudy at the beginning of observing run,
so we could not open the dome. 
From the middle of the night, humidity was growing up to 99% 
and clouds and fog were getting heavy.
The bad weather was not getting better at 4 am,
so we shut down around 4:30 am.

This is not necessarily a problem, but something that we noticed:
The E/W tilt sensor drifted back and forth around its typical 
value during the night. It was mostly at about -0.25, but 
sometimes changed by +/- 0.15 over about 15-30 minutes, then 
would eventually drift back. This behavior did not seem related
to the wind or other atmospheric conditions, and was only
noticeable because we were sitting in the control room not 
moving the telescope due to the bad weather. The TCS was not
'start'ed. The shifts were small enough that had we been 
observing, the autoguider would probably have seamlessly 
corrected them.

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Submitted on 2015 Nov 26 [4:47:21]