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LTO Report

Kitt Peak Nightly LTO Report For UT: 2015-10-03

Report Time (MST): 05:10                    For access to all LTO-Reports go to:

4 Meter Weather Averages
From: UT = 01:00 (MST=6:00 PM) To: UT = 13:00 (MST=6:00 AM)
Elements Mean High Low AvDev
Air Temperature (°C)15.418.214.10.8
Dewpoint Temperature (°C)4.110.1-2.33.8
Relative humidity (%)4567288.6
Wind Speed (mph)
Wind Direction (°)18511201.4
4M Dome Temperature (°C)15.620.214.31.0
4M Dome Dewpoint (°C)4.28.7-0.43.2
4M Primary Mirror (°C)17.819.516.20.8

Weather Comments: Some cirrus around at sunset, but moving off after a couple hours. Clear the rest of the night. Less windy tonight - certainly no high gust. Humidity was on the rise, peaking around 75% at 22:00 - 23:00, in the 40% range after that.
Recognized Hours: ( 10 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterStevans, Wold, Florez 2013B-0236 NEWFIRM N/A 1.2
WIYNEverett, Hirsch 2015B-0000 SPECKLE N/A 0.7
2.1 MeterNo Observer --- N/A N/A N/A
FeedNo Observer --- N/A N/A N/A
0.9 MeterWinans 2015B-0902 HDI N/A 2.5

Time Usage During The Night
Telescope Hours Used Night's Activity   Hours Lost Time Lost
Due To:
Time of
Night (MST)
9.0 Scientific Research   0.5 Instrument Problem 22:30 - 02:00
      0.5 Tele-Control Problem 21:30 - 22:00
10.0 Scientific Research        
0.25 Extra Science Time        
0.0 Scientific Research      
0.0 Scientific Research      
10.0 Scientific Research        
1.5 Extra Science Time        

Observing Status
4 MeterLost 20 to 25 minutes to 4Maps "Servo Correction too Big" error condition, see MSR #24415. Seeing ranged from 1 - 1.6 arcseconds and was typically around 1.2 arcseconds. Though the 4m-weather station wind speed is not putting out (steady @ zero) it was pretty easy to tell winds were not as high as last night. There were two instances where the NEWFIRM NOCS simply hung with the "Telescope Control System" window saying "Offsetting" but nothing happened after that. The first time was on image 8 of 32, the second time was image 32 of 32. Both times a complete shutdow/restart of NOCS was required. Lost about 30 minutes to this problem.
WIYNNo problems. Seeing was mostly around 0.7 arcsecond.
2.1 MeterNot Scheduled
FeedNot Scheduled
0.9 MeterNo problems. Seeing was between1.8 and 3.2 arcseconds and typically around 2.5 arcseconds.

CommentsA pretty good night of observing.

Reported by:Doug Williams

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