| 233 | | 7. Monitor focus by checking the image quality on each frame. Keep track of the truss temperature variation and modify the focus as needed. The Mayall has astigmatism, so one can tell from the shape of the images which way to move the focus. To stop and do a focus sequence: |
| | 233 | 7. Start running "copilot", which is the thing that keeps a beautiful running plot of observing conditions. |
| | 234 | |
| | 235 | 8. Monitor focus by checking the image quality on each frame. Keep track of the truss temperature variation and modify the focus as needed. The Mayall has astigmatism, so one can tell from the shape of the images which way to move the focus. To stop and do a focus sequence: |
