AIPS HELP file for UV2TYPE in 31DEC24
As of Tue Nov 12 8:27:46 2024
HELP SECTION
UV2TYPE
Type: information only.
Information: Convolving function type 2 = Exponential
Function = EXP ( - (ABS(U)/PARM(2)) ** PARM(3) )
Parameters are:
PARM(1) = Support size. 0 --> 3.0 cells
0 --> PARM(2) = 1.00 cell
0 --> PARM(3) = 2.00
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 2 and -2 are rectilinear (in X and Y separately), types 12
and -12 are circular (in R = sqrt(X*X+Y*Y)).
Types -2 and -12 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 = 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