flat drives the WFC in the same ways as the run command (q.v.) but marks the observation's file as a flat field which improves the handling of the data.
flat time ["title"]where time is in seconds. The title-string must be enclosed in double quotes. The default title is "Flat Field"
Each run generates four FITS files, each with a different run-number. For a particular file, the name of the CCD that produced it may be recovered from the FITS keyword CHIPNAME and the CCD number (1..4) from DASCHAN.