LTO Reports

KPNO LTO Reports
are available here        

Click here for last night's (170329) :

Or, enter desired date (yymmdd):


LTO Report

Kitt Peak Nightly LTO Report For UT: 2017-03-29

Report Time (MST): 06:01                    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)
Dewpoint Temperature (°C)-6.5-4.5-9.50.7
Relative humidity (%)4045371.4
Wind Speed (mph)17.836.49.54.7
Wind Direction (°)2881462831.1
4M Dome Temperature (°C)6.911.55.61.2
4M Dome Dewpoint (°C)-6.2-3.0-7.50.9
4M Primary Mirror (°C)

Weather Comments: Moderate winds (~20-30mphs) from the SW at the beginning of the night, switched and came out of the NW after midnight. Moderate humidity all night ranging from 40%-50%. Light cirrus here and there throughout the night, but overall a clear night, with dismal seeing.
Recognized Hours: ( 9.25 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterSprayberry, Cukanovaite 2016A-0453 MOSAIC N/A 1.4
WIYNPagel (remote) 2017A-0418 ODI N/A 1.4
2.1 MeterNieberding, Baranec, Salama 2015B-3001 Visitor N/A N/A
FeedNo Observer --- N/A N/A N/A
0.9 MeterKalawila, Barkhouse, Archer, Foote 2017A-0292 HDI N/A 1.5

Time Usage During The Night
Telescope Hours Used Night's Activity   Hours Lost Time Lost
Due To:
Time of
Night (MST)
8.25 Scientific Research   0.25 Instrument Problem 19:00 - 19:30
      0.75 Computer Problem 04:30 - 05:30
9.25 Scientific Research      
9.25 Scientific Research      
0.0 Scientific Research      
9.25 Scientific Research      

Observing Status
4 MeterBit of a rough start to the beginning of the night, there were repeated timeouts and readout failures with mosaic. These were fixed by moving heavy cables off of controller power supply connectors and tightening one loose power supply connector (Thanks Arjun, Steve, Brent and Paul!). Only lost about 15mins of dark time. Lost the last 45mins of the end of the night due to MAPS went off air and we were unable to get it back on air. Called Behzad and he fixed it (thanks!!), he said that the root partition of the hard drive had filled up. Seeing Range: 1.0-2.0 arcsec, Median: 1.45 arcsec.
WIYNNo issues. Seeing measured by ODI Range: 1.0-2.0 arcsec, Median: 1.4 arcsec.
2.1 MeterNo issues, on sky all night.
FeedNot Scheduled
0.9 MeterNo issues, a good night. Seeing measured around 1.5 arcsec.

CommentsOverall, a productive night despite the poor seeing conditions.

Reported by:Amy Robertson

Weather Plots