[daip] Mosaicing-FLATN

[Eric Greisen]

Mpati Ramatsoku wrote:
>   Hi Eric,
> 
> 
> I am trying to run FLATN to mosaic my pointings, but I seem to be having 
> some issues.
> 
> 
> I have 2 pointings at 21cm from WSRT and want to combine them.
> 
> My FLATN inputs are:
> 
>  AIPS 1: FLATN: Re-grid multiple fields and pointings to one image
> AIPS 1: Adverbs     Values                 Comments
> AIPS 1: ----------------------------------------------------------------
> AIPS 1:                                    Input images
> AIPS 1: INNAME     'PPZOA'                    Image name (name)
> AIPS 1: INCLASS    'ICL001'                   Image name (class)
> AIPS 1: INSEQ         1                       Image name (seq. #)
> AIPS 1:                                          (specify)
> AIPS 1: INDISK        5                       Image disk drive #
> AIPS 1: NFIELD        1                    Max number of fields per
> AIPS 1:                                       pointing
> AIPS 1: NMAPS         2                    Number of pointings
> AIPS 1:                                    Output image
> AIPS 1: OUTNAME    'PPZOAMO'                  Image name (name)
> AIPS 1: OUTCLASS   ' '                        Image name (class)
> AIPS 1: OUTSEQ        0                       Image name (seq. #)
> AIPS 1: OUTDISK       5                       Image disk drive #
> AIPS 1: IMSIZE        0           0        Output image size in pixels
> AIPS 1: COORDINA   *all 0                  Central pixel coordinate
> AIPS 1:                                    all 0 => use observed
> AIPS 1: COOTYPE    ' '                     Desired projection type
> AIPS 1: COOINC        0           0        Desired coordinate increment
> AIPS 1: COOREF        0           0        Desired reference pixel
> AIPS 1: ROTATE        0                    Rotation to be used (deg)
> AIPS 1: REWEIGHT      0           0        (1) Interpolation halfwidth
> AIPS 1:                                    (2) Minimum fraction of good
> AIPS 1:                                        pixels required (0->1/3)
> AIPS 1: WEIGHTIT      0                    Weight image down by WEIGHTIT
> AIPS 1:                                    times radius from center in "
> AIPS 1: EDGSKP        1                    Skip pixels around the edges
> AIPS 1:                                    inscribed ellipse also used
> AIPS 1: OPTYPE     ' '                     For mosaics only (NMAPS>1)
> AIPS 1:                                    compute and output expected
> AIPS 1:                                    noise ('NOIS') or weight
> AIPS 1:                                    ('WEIG').
> AIPS 1: APARM      *all 0                  (1) >0 => do 3-D corr.
> AIPS 1:                                       ONLY for snapshots
> AIPS 1:                                    (2) Parallactic angle (deg)
> AIPS 1:                                    (3) Zenith angle (deg)
> AIPS 1:                                    (4-8) radial scaling parms
> AIPS 1:                                    (9) Linear scaling
> AIPS 1: PBPARM        0           1        Beam parameters (NMAPS > 1)
> AIPS 1:            *rest 0                 (1) Cutoff; (2) Use (3)-(7)
> AIPS 1:                                    (3)-(7) Beam shape
> AIPS 1: NOISE      *all 0                  Relative uncertainties by
> AIPS 1:                                    pointing: 0 -> image header
> AIPS 1: BADDISK    *all 0                  Disks to avoid for scratch
> 
> 
> I have both my pointings included, but only corners are included  and 
> all the pixels within the round shape are blanked. It should be the 
> other way around.
> 
> Am I missing something important here?
> 
> I would appreciate any help on this issue,
> 
> Thank you very much.
> 
> Mpati

Can you do IMHEADER on each of the two images and send me what comes 
out?  Then I can simulate the job and see what I get.

Thanks

Eric Greisen