[daip] no visibilities in image header

[Eric Greisen]

What data did you download from the archive?

I just downloaded the 5 files from AO123 from June 29 1995 and loaded
them with FILLM and got just two output files a LINE and a channel 0

IMHEADE:


>imh
AIPS 1: Image=MULTI     (UV)         Filename=19950629    .LINE  .   1
AIPS 1: Telescope=VLA                Receiver=VLA
AIPS 1: Observer=AO123               User #=   36
AIPS 1: Observ. date=29-JUN-1995     Map date=25-MAY-2005
AIPS 1: # visibilities   3950626     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  BASELINE  TIME1
AIPS 1:            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: FREQ         7   1.3649000E+09       4.00  3.1250000E+06    0.00
AIPS 1: STOKES       2  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: IF           2   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: RA           1    00 00 00.000       1.00       3600.000    0.00
AIPS 1: DEC          1    00 00 00.000       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 1950.00
AIPS 1: Maximum version number of extension files of type HI 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 NX is   1
AIPS 1: Maximum version number of extension files of type SU is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type CL is   1
AIPS 1: Maximum version number of extension files of type TY is   1
AIPS 1: Maximum version number of extension files of type WX is   1
AIPS 1: Keyword = 'OBSCHANS'  value =            8
AIPS 1: Keyword = 'CORRMODE'  value = '4       '
AIPS 1: Keyword = 'SELCHANS'  value =            7
AIPS 1: Keyword = 'VLAIFS  '  value = 'ABCD    '


I note that the header you sent had a negative frequency and only 1
stokes and 1 IF.  The latter could be okay but not the first.

AO123 has a lot more data at other configurations at a latter time as
well, which I ignored.

Eric Greisen