Date: 2018 Sep 18 UTC
Observers: R Humphreys (OSURC), S. Walsh (LBTO) 
TO: J. Williams  
SA: 

Moon phase: 1st quarter moonset 00:24  

Summary: Start with LBC, Clouds first half, no observations
Switch to MODS not until ~ midnight, intermittent clouds  
No good data obtained due to clouds 

Calibrations: All calibrations completed for OSU_BD with special mask. 


Completed Programs: 

02:30 moving to NGC 6503 field for collimation 
      scattered clouds in the field
02:50 start NGC 6503 seeing 1.1 - 1.3, scattered clouds   
03:02 paused due to clouds,  exposure stopped 
04:00 light precipitation, shutter closed 
06:40 opening shutter, clouds thinning
06:45 switch to MODS1, thin clouds 
07:13 moving to J0036 
07:20 align, target near center, only small adjustment needed, seeing 0.6 
07:34 start single test exposure for 300s , thin clouds?
      no saturation, but target needs to move slightly up in y direction.
07:44 another single for 300s 
07:50 start series for 3 hours,  change exp time to 600s      
07:56 lost guiding, paused, thin clouds  
      Clouds 
08:17 start sequence again, clearing (images 15 - 17) 
      (note image 16 was duplicated with a unique name)
      clouds increasing  
      image 17 paused readout at 7m  
      Clouds 
10:03 closed shutters, light rain 
10:37 closing down