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• Transfer code works. The images are written to the internal disk and then transferred to the external disk.
• Sources are consistent through 22:45 Chile time
• The camera is moving to the left with a rate of 2 pixels for 500 frames, this was 488
• Actually no turning left, the images started moving right, this is 1276
• We may see huge differential image motion. Or it may cancel out in the COM frame.
• We were taking 5 second exposures, from 11 until 322.
• Started 1, 10, 30  second exposures with 323
• Started 1, 5, 10, 30 second exposures with 326
•  Frame 2110, still all sources detected.
• Time 23:33, rotating the dome and taking pictures with the best exposure. Planning to take an additional hour of data after this.
• 23:48 dome opened up more in addition to rotation.
• 23:50, tried 3072, focus gone, going to run back.
  
  
• Went up to dome and refocused. New data is in observe-readjust folder
• We find decent sources but it looks like we have a significant shift to left. This time for real.
• Will start taking flats at 1AM.
• The files locations got fixed again. No left shift.

Flat file trials:

From Stubbs:
Ok sounds like a partial success. I think the key think is to get a good dome-closed vs. dome-open comparison. 
I don't understand the longer exposures. Is that with a single flash per image? If so then all the longer images would seem to do is add to the background and not the signal. Or are you running with constant light source? 
I can certainly believe that dome rotation shakes things- During most image the dome is not rotating. 
The focus change could well be due to temperature change of the lens. I can't remember if there is an f-stop ring on that lens or not... I think not. The depth of focus will increase if you make a smaller aperture in front of the lens. There is heavy duty Aluminum foil in the cardboard fan box at the base of the pier. You could try making a snout with a 1 inch off-axis hole and see if that (with reducing ND filter) helps with focus. 

Stubbs comments- 

This looks like great progress, bravo. We need to be sure the cables and other elements are not trip hazards, and so I suggest running them under the grating floor somebow. Also the camera isn't pointed quite in the direction I was expecting but I'm sure you guys have that figured out. Finally, we need to be sure we aren't obstructing the new in-dome illumination system that Patrick and Parker are installing. 
Happy to arrange a time to talk over zoom tomorrow if you like. 
 

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