CHREFANT Type: Adverb (Character*2) Use: Name of reference antenna used in VLBA pipelines. It is defined by those procedures (see below) Null Value: ' ' Null value, means a sensible antenna in the southwest will be tried (FD, PT, LA or KP). Procedures: VLBARFI.......Calibrates VLBA autocorrelations, writes out statistics VLBARUN.......Applies amplitude and phase calibration procs to VLBA data.