[daip] FITLD broken?

[Adam Deller]

Looking with more care, it seems that all hardware-correlator files
are being mangled.  Stuff that was correlated with DiFX seems ok.

Cheers,
Adam

On Tue, Jun 15, 2010 at 7:56 PM, Adam Deller <adeller at nrao.edu> wrote:
> Hi,
>
> There is something very strange going on with FITLD for VLBA data in
> AIPS - it is scrambling the SU table for some files (but not all).  I
> have checked out this particular file (you can see it at
> /home/marathon2/data/1023+0038/bd141a/BD141A_UG_HPOL4IF8MHZ16CH_1.6515GHZ00)
> using fv and see a sensible looking SU table.  However, as soon as I
> load it into AIPS with FITLD the SU table reads:
>
>       1    5.0000000000D+05    1.4176255806D+02     3.9039125519D+01
>  2.0000000000D+03    1.0792773795D+02    4.5395855014D+01
>       2    5.0000000000D+05    1.5612327792D+02    -8.8208229444D-01
>  2.0000000000D+03    1.3016422419D+02    7.9956464878D+00
>       3    5.0000000000D+05    1.5591154583D+02     4.0463333333D-01
>  2.0000000000D+03    1.2979993496D+02    9.2488222431D+00
>       4    5.0000000000D+05    1.5271527786D+02    -2.0054371833D+00
>  2.0000000000D+03    1.2689149360D+02    6.4704735040D+00
>
> where the columns are channel bandwidth, RA epoch (deg), Dec epoch
> (deg), Epoch (years), RA apparent (deg) and Dec apparent (deg).  You
> can see that the apparent source positions have changed by many
> degrees - something is amiss.  I tried running FITLD from 31DEC09 but
> got the same result.  This is data from the hardware correlator from
> late 2008.
>
> Cheers,
> Adam
>
> --
> !=============================================================!
> Dr. Adam Deller                            Ph  +1 575 835 7492
> Jansky Fellow                               Fax +1 575 835 7027
> National Radio Astronomy Observatory
> Socorro NM 87801, USA
> !=============================================================!
>



-- 
!=============================================================!
Dr. Adam Deller                            Ph  +1 575 835 7492
Jansky Fellow                               Fax +1 575 835 7027
National Radio Astronomy Observatory
Socorro NM 87801, USA
!=============================================================!