[daip] imagr

[Shea D. Brown]

Hello,
    I was wondering where imagr gets it's frequency information in the
uv-data?
     I am reducing WSRT data with AIPS: 8 IFs, 64 channels per IF.  I've
used SPLAT to apply a Hanning taper and have selected every other
channel to make 32 channels per IF.  The frequencies look correct in
the header, but when I make the images with imagr, the images become
distorted across an IF, as if imagr is not getting the frequencies
correct (the problem then 'resets' when you get to the next IF, only
to start distorting again).  I've included the IMHEADER output for my
multisource file below.  Thanks for any suggestions on how to hunt
down this problem.

Shea Brown
University of Minnesota
Department of Astronomy

AIPS 1: Telescope=WSRT               Receiver=WSRT
AIPS 1: Observer=ProcessD            User #=   77
AIPS 1: Observ. date=20-JAN-2006     Map date=31-MAY-2006
AIPS 1: # visibilities    200928     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  TIME1  BASELINE
AIPS 1:            INTTIM  SOURCE  FREQSEL  WEIGHT  SCALE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      1   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       4  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: FREQ        32   3.8140625E+08       1.00 -3.1250000E+05    0.00
AIPS 1: IF           8   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: RA           1    05 42 36.138       1.00       3600.000    0.00
AIPS 1: DEC          1    49 51 07.236       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Rest freq      0.000         Vel type: OPTICAL wrt YOU
AIPS 1: Alt ref. value  0.00000E+00  wrt pixel    0.50
AIPS 1: Maximum version number of extension files of type SU is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type HI is   1
AIPS 1: Maximum version number of extension files of type CL is   2
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type NX is   1
AIPS 1: Maximum version number of extension files of type BP is   2
AIPS 1: Maximum version number of extension files of type FG is   1