AIPS HELP file for REFDATE in 31DEC22
As of Sun Feb 5 19:45:23 2023
Type: Adverb (String*8)
Use: Date from which all times in a uv data set are counted. It must
be the lowest day number in the data set - i.e., get it right.
Task FXTIM can be used to repair a data set for negative times.
Format: 'yyyymmdd' should be used. The old 'dd/mm/yy' is usally
accepted but is deprecated.
Null value: ' '
Null => use the first one found.
FILLM.......Translates VLA on-line data to AIPS uv format. Default
is usually safe.
FITLD.......Reads FITS files to load images or UV (IDI or UVFITS)
data to disk.
FXTIM.......Fixes start date so all times are positive.
M3TAR.......Translate Haystack MKIII VLBI format "A" TAR's into
MK3IN.......Translates MkIII VLBI data tapes to AIPS uv format.
Default often gives wrong results since data are often
not in time order.
UV2MS.......Appends single-source file to multi-source file. Be
careful with the default if more data are to be appended