AIPS HELP file for DOALIGN in 31DEC25

As of Wed Dec 11 4:49:40 2024

HELP SECTION

DOALIGN
Type:  Adverb (Logical)
Use:   Controls how two or more maps are aligned by various tasks.  If
       DOALIGN positive (actually >= 0.1), then the images are aligned
       by their coordinates and are required to have the same axis
       increments, types, and rotations.  If DOALIGN is zero (actually
       -0.1 < DOALIGN < 0.1), then the images are aligned by their
       coordinates at the bottom left corner (computed linearly without
       regard for rotation), but no other tests are made.  If DOALIGN is
       -1 (actually <= -0.1 and >= -1.5), then the images are aligned by
       offset from their reference pixels and no axis parameter tests
       are made.  If DOALIGN = -2 (actually < -1.5), the images are
       aligned at pixel (1,1,...) and the headers are ignored --- which
       can lead to bad output headers of course.
Null value:  true (1).

Procedures:
   DOFARS........Procedure to aid in Faraday rotation synthesis using the
                 FARS task.
Tasks:
   AFARS.........Is used after FARS to determine Position and Value of the
                 maximum.
   BLANK.........Blanks out selected, e.g. non-signal, portions of an
                 image.
   BLSUM.........Sums images over irregular sub-images, displays spectra.
   BSCOR.........Combines two beam-switched images.
   CMPLX.........Combines complex images by a variety of mathematical
                 methods.
   COMB..........Combines two images by a variety of mathematical methods.
   FARS..........Faraday rotation synthesis based on the brightness vs
                 wavelength.
   FQUBE.........Collects n-dimensional images into n+1-dimensional FREQID
                 image.
   GREYS.........Plots images as contours over multi-level grey.
   HUINT.........Make RGB image from images of intensity & hue, like
                 TVHUEINT.
   IMVIM.........Plots one image's values against another's.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.
   MCUBE.........Collects n-dimensional images into n+1-dimensional image.
   MEDI..........Combines four images by a variety of mathematical
                 methods.
   PCNTR.........Generate plot file with contours plus polarization
                 vectors.
   TVHUI.........Make TV image from images of intensity, hue, saturation.
   TVRGB.........Make TV image from images of true color (RGB) images.

EXPLAIN SECTION