; NFILES
;---------------------------------------------------------------
;! The number of files to skip, usually on a tape.
;# ADVERB TAPE
;-----------------------------------------------------------------------
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;;
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
NFILES    LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
NFILES
Type:  Adverb (Scalar)
Use:   Specifies the number of tape files used in the operation.
       In most uses, NFILES = 0 means to position the tape at
       the start of the current file, NFILES = n (n > 0) means
       position the tape just after n end-of-file marks from the
       present position, and NFILES = m (m < 0) means position
       the tape at the start of the m'th file preceding the
       current file.
Null value:  None
Verbs:
   AVFILE........Moves tape forward or back to end-of-file marks.
Procedures:
   READISK.......Reads images / uv data w extensions in FITS format into
                 AIPS.  NFILES is the first catalog number to use.
   VLBAARCH......Procedure to archive VLBA correlator data.  NFILES is
                 used for tape and for the job number of disk files.
   VLBALOAD......Loads VLBA data.
   VLBATECR......Calculate ionospheric delay and Faraday rotation
                 corrections.  NFILES is the numver of TEC data files.
   WRTDISK.......Writes images / uv data w extensions to disk in FITS
                 format.  NFILES is the first catalog number to use.
Tasks:
   ATLOD.........Reads ATCA data in RPFITS dormat into AIPS.
   AVTP..........Positions tape to desired file.
   BAKLD.........Reads all files of a catalog entry from BAKTP tape.
   FILLM.........Reads VLA on-line/archive format uv data tapes (post Jan
                 88).
   FILLR.........Reads old VLA on-line-system tapes into AIPS.
   FITLD.........Reads FITS files to load images or UV (IDI or UVFITS)
                 data to disk.
   IMLOD.........Reads tape or disk files to load images to disk.
   M3TAR.........Translate Haystack MKIII VLBI format "A" TAR's into AIPS.
   MK3IN.........Translate Haystack MKIII VLBI format "A" tapes into AIPS.
   PRTTP.........Prints contents of tapes and disk files, all supported
                 formats.
   SLCOL.........Task to collate slice data and models.  NFILES is the
                 number of slice files to collate.
   TCOPY.........Tape to tape copy with some disk FITS support.
   TECOR.........Calculate ionospheric delay and Faraday rotation
                 corrections.  NFILES is the number of TEC data files.
   UVLOD.........Read export or FITS data from a tape or disk.
----------------------------------------------------------------
