File name setting for side of meridian

Yes sir. The usual night is to take a set of flats for the East side of the meridian before I start imaging, and I'll calibrate those images (usually as they come in) then after the flip and camera rotation, I let all the West side subs come in and finish up the night. Then at the end of the session I take another set of flats to match the post flip camera rotation and calibrate all the West side subs. It was easy to keep track of which subs had been calibrated or not by just looking at the file name which had a W or E in it.
Dan