This primitive makes a copy of the masterflat and index.flat from the current directory to calibration library (pointed to by the ORAC_DATA_CAL environment variable.

• This primitive is suitable for optical imaging instruments.

• Processing only occurs for flat frames, and when the steering header MAKE_FLAT is true.

The masterflat. It is called " flat_$<$instrument$>$_$<$UTnight$>$_SKYFLAT_bin$<$Xbin$>$x$<$Ybin$>$_$<$filter$>$" where $<$instrument$>$ is the LCOGT instrument identifier, $<$Xbin$>$, $<$Ybin$>$ are the binning factors in X and Y and $<$filter$>$ is the filter.

KAPPA: NDFCOPY.