Tips for skyflat images

Telescope operation

EL=80, AL=(any) in tracking mode.
or go to a blank field

Issue movetelescope command
or use GetSkyFlat commands for automatic shift of 6'.

twilight + 30 min (dawn) or -30 min. (evening)

~1, ~3, ~10, ~30 secs~30 for evening
~10 sec, ~3 sec, ~1 sec for dawn

Exposure time should be ~1/3 or ~1/2 for next exposure.
This factor would change according to the readout time (i.e., binning mode)

At evening: start from U, then B, V, R, I

At morning: start from I, then R, V, B, U