[daip] flatn

[Rob Ivison, Edinburgh]

i'm having problems with FLATN on an Intel Mac running the latest 
AIPS.

i'm trying to mosaic together 6 sets of 37 images, using the GMRT 
primary beam correction, cutting off at the half-power point.

my 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     'LOCK'                     Image name (name)
AIPS 1: INCLASS    'ICL001'                   Image name (class)
AIPS 1: INSEQ         1                       Image name (seq. #)
AIPS 1: INDISK        1                       Image disk drive #
AIPS 1: NFIELD       37                    Max number of fields per
AIPS 1:                                       pointing
AIPS 1: NMAPS         6                    Number of pointings
AIPS 1:                                    Output image
AIPS 1: OUTNAME    'LOCKMAN-610'              Image name (name)
AIPS 1: OUTCLASS   'FLATN'                    Image name (class)
AIPS 1: OUTSEQ        0                       Image name (seq. #)
AIPS 1: OUTDISK       1                       Image disk drive #
AIPS 1: IMSIZE     3500        3500        Output image size in pixels
AIPS 1: COORDINA     10          51        Central pixel coordinate
AIPS 1:              57          57        all 0 => use observed
AIPS 1:              21          30
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       55                    Skip pixels around the edges
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        0.5         1        Beam parameters (NMAPS > 1)
AIPS 1:              -3.486      47.749    (1) Cutoff; (2) Use (3)-(7)
AIPS 1:             -35.203      10.399    (3)-(7) Beam shape
AIPS 1:               0
AIPS 1: NOISE        31          32        Relative uncertainties by
AIPS 1:              31          29        pointing
AIPS 1:              47          84        *rest 0
AIPS 1: BADDISK    *all 0                  Disks to avoid for scratch

but it seems to ignore some of them (APARM and some PBPARM) and talks 
about 3D corrections (which i have turned off). it also says it is 
using the VLA primary beam parameters. finally, it doesn't appear to
perform a PB correction.

any idea what i'm doing wrong?

output reproduced below...

cheers,

Rob

lots of lines saying:
localh> FLATN1: *** I HOPE YOU KNOW WHAT YOU ARE DOING ***
localh> FLATN1: *** WARNING: DOING 3-D CORRECTIONS. ***
localh> FLATN1: *** I HOPE YOU KNOW WHAT YOU ARE DOING ***
localh> FLATN1: *** WARNING: DOING 3-D CORRECTIONS. ***
localh> FLATN1: *** I HOPE YOU KNOW WHAT YOU ARE DOING ***
followed by:
localh> FLATN1: Create LOCKMAN-610 .FLATN .   3 (MA)  on disk  1  cno 1081
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     1 included blc,trc  1536  1547  1940  1951
localh> FLATN1: PBCALC: VLA ANTENNA USED FOR ARRAY GMRT
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     2 included blc,trc  1145  1547  1550  1953
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     3 included blc,trc  1535  1157  1940  1561
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     4 included blc,trc  1143  1157  1549  1563
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     5 included blc,trc  1925  1547  2330  1952
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     6 included blc,trc  1536  1937  1940  2341
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     7 included blc,trc  1146  1937  1552  2343
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     8 included blc,trc  1923  1937  2329  2342
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field     9 included blc,trc  1926  1157  2332  1562
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field    10 included blc,trc   754  1549  1161  1955
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
localh> FLATN1: Field    11 included blc,trc  2314  1548  2721  1955
localh> FLATN1: INTWIN WARNING: DOING 3D CORRECTIONS
ending after 221 images with:
localh> FLATN1: Field   221 included blc,trc  1558   743  1962  1147
localh> FLATN1: Now divide by the sum of the weights
localh> FLATN1: Appears to have ended successfully
localh> FLATN1: localhost    31DEC07 TST: Cpu=      71.1  Real=     174