Calibration images shall be available for nightly observing in the DMS image archive at least 1 hour prior to the start of observing.
This is impossible to verify without an understanding of when calibration data acquisition ends. I think there needs to be added clarification as to when calibration image acquisition ends and how much data will be taken during the day. Does calibration acquisition end 2 hours before the start of observing? Or 61 minutes prior? Are we observing continuously from dawn until that time?