AIPS HELP file for UV6TYPE in 31DEC24

As of Wed Apr 24 18:55:28 2024

HELP SECTION

UV6TYPE
Type: information only.
Information:  Convolving function type 6 = Exp * BessJ1 (x) / x
      Function = BESSJ1 ( ABS(U) / PARM(2) ) / ( ABS(U) / PARM(2) )
                 *  EXP ( - ((ABS(U)/PARM(3)) ** PARM(4)) )

      Parameters are:
         PARM(1) = Support size.  0 --> 3.0 cells
         0 --> PARM(2) = 1.55 cells
         0 --> PARM(3) = 2.52 cells
         0 --> PARM(4) = 2.0
      See memos by Fred Schwab for more details; large support size
      may have undesired results. Changing these can put divides by
      zero in the map plane and can reduce the degree of alias
      suppression.  See the VLA Scientific Memo Series 123, 124, 129,
      and 131.  See also Synthesis Imaging in Radio Astronomy, ASP
      Conference Series, Volume 6, pages 130-134.

      Types 6 and -6 are rectilinear (in X and Y separately), types 16
      and -16 are circular (in R = sqrt(X*X+Y*Y)).

      Types -6 and -16 are for single-dish use and have units of arc
      seconds for PARM(1) with default = single-dish-beam_size and for
      PARM(2) with default =  1.55 * single-dish-beam_size/3 and for
      PARM(3) with default =  2.52 * single-dish-beam_size/3.

Tasks:
  BSGEO....Single-dish re-grid from pseudo az-el to RA-dec.
  BSGRD....Single-dish continuum beam-switched imaging and correction.
  CONPL....Plot aspects of the convolving functions.
  IMAGR....Interferometer imaging with calibration, Cleaning, and
           wide-field corrections.
  SCIMG....Full-featured imaging plus self-calibration loop with
           interactive editing
  SCMAP....Interferometer imaging with Cleaning, self-calibration and
           interactive editing.
  SDGRD....Single-dish imaging.
  SDIMG....Single-dish imaging able to do large fields (with large
           scratch files).
  UVIMG....Grid UV data into an "image"
  UVMAP....Interferometer imaging with no Cleaning, no calibration.

EXPLAIN SECTION