AIPS NRAO AIPS HELP file for MASKS in 31DEC21



As of Wed Oct 27 23:10:59 2021


MASKS: Makes mask image showing the boxes in BOXFILE

INPUTS

INNAME                             Input image name (name).
INCLASS                            Input image name(class).
INSEQ           0.0      9999.0    Input name(seq. #). 0=>high
INDISK                             Input disk drive #. 0=>any
OUTNAME                            Output image name (name)
OUTCLASS                           Output image name (class)
OUTSEQ            0.0    9999.0    Output image name (seq. #)
OUTDISK           0.0       9.0    Output disk drive #
BOXFILE                            disk file to read Clean boxes
DOBLANK        -1.0         1.0    > 0 Use blanks for unCleaned
DOWEDGE        -2.0         2.0    > 0 Add field number in boxes

HELP SECTION

MASKS
Type:  Task
Use:   MASKS reads an input BOXFILE which defines the Clean boxes for
       the input image.  It makes an image with 1's in the Clean windows
       and blanks or 0's outside the Clean windows.
Adverbs:
  INNAME......Input name of image(name).     Standard defaults.
  INCLASS.....Input name of image(class).    Standard defaults.
  INSEQ.......Input name of image(seq. #).   0 => highest.
  INDISK......Disk drive # of image.         0 => any.
  OUTNAME.....The output image name (name).    Standard defaults.
  OUTCLASS....Output name of image(class).   Standard defaults.
  OUTSEQ......The output image name (seq. #).  0 => highest.
  OUTDISK.....The output disk drive #.         0 => any.
  BOXFILE.....Input text file containing lines which specify the fields
              for the multi-field imaging.  This file should then be
              specified as the BOXFILE for IMAGR.
              ' ' => take all inputs from adverbs.
              Leading and trailing blanks from all lines in the text
              file are discarded, so "column 1" below means the first
              non-blank column in the card.
              This option is used to specify field parameters for
              fields 1 through NFIELD which are then copied to the
              fields used for additional resolutions (if any).  To
              specify a field's parameters, put the letter F or f in
              column 1 followed by the field number, the X and Y FLDSIZE
              values, the RASHIFT amd the DECSHIFT for the field
              (separated by blanks).  Any field specified in this way
              overrides the corresponding parameters given in the
              adverbs.  Thus,
              F  2  450 450 -25.5 6.7
              specifies that field 2 is to have a FLDSIZE of 450x450 with
              an RASHIFT of -25.6 and a DECSHIFT of 6.7 arcsec.  If this
              is the only F card in the file, then fields 1 and 3 through
              NFIELD are set by the adverb values.  As an alternative, a
              field may also be specified with a "coordinates" card
              having a C or c in column one.  After the C, give the field
              number, the X and Y FLDSIZE values and the center Right
              Ascension (HH MM SS.S) and Declination (signDD MM SS.S)
              separated by blanks.  Thus
              C  2  450 450  11 34 45.67 -00 14 23.1
              specifies that field 2 is to have a FLDSIZE of 450x450 with
              a center RA of 173.6902917 degrees and a center Declination
              of -0.23975 degrees.  All 9 numbers must be given; the sign
              is optional for positive declinations and is given only on
              the degrees term.

              To set Clean boxes, specify one box per line, as field
              blc-x blc-y trc-x trc-y (5 integers) e.g.
              1 200 205 220 222
              1 230 232 240 241
              2 100 100 130 121
              ...
              or circular "boxes" as
              field -1 radius center-x center-y  (5 ints) e.g.
              001  -1  10 210 214
              001  -1   5 235 237
             ....
              Column 1 must contain a numeric character (part of the
              field number); otherwise the line is treated as a some
              other sort of line.  Fields with no boxes specified
              default to the size specified by IMSIZE and FLDSIZE (see
              above and including FLDSIZEs read from this file).
  DOBLANK.....True (> 0) => pixels outside Clean boxes are represented
              with magic-value blanks; otherwise 0's are used.  When
              FLATN is run, 0's are interpolated and averaged causing
              interesting but sometimes odd effects.  Blanks are
              usually better.
  DOWEDGE.....True (> 0) => insert the field number in all Clean
              windows that are large enough.  Image intensity 2 is
              used for window boundaries, 1 for Clean windows outside
              the numbers and 3 times this for numbers.  DOWEDGE 2
              telss the task to make the numbers rather larger (for
              TVLODs with TXINC and TYINC > 1).  Again FLATN's
              interpolation can do some odd things.
              DOWEDGE < -1 says to use intensity 1 for the edges of
              the boxes rather than 2.

EXPLAIN SECTION


AIPS