[daip] PCCOR question

[Leonia Kogan]

Dayton,

I'll look at the PCCOR codes and look what can I do to cancel the I IF 
limit.
Give me several days please.

Leonia Kogan
Dayton Jones wrote:

>Hi.  I am working with a small interferometer at JPL that sends an LO 
>signal to each antenna over a fiber optic cable.  Temperature changes 
>in the cables cause changes in the LO phases, so we measure and record 
>the round-trip phase variations for each cable.  My plan was to apply 
>these phase corrections, suitably scaled, to the baseline phases in 
>AIPS using tasks PCCOR and CLCAL.  The correlator output is currently  
>written to a FITS file to which the cable phase data are added.  In 
>AIPS the cable phases are contained in a PC table, with one pair of 
>real and imaginary values per antenna per time interval.  However, I 
>just found that PCCOR will not deal with data having a single IF, so 
>I am not able to get the cable phase corrections into SN or CL tables 
>to apply to the visibilities.  It is important that we correct the 
>baseline phases because we need to use them to solve for an improved 
>baseline vector.  Is there an alternative way to apply an external, 
>time-dependent phase correction to data in AIPS?  Thank you for any 
>suggestions you may have.  Cheers,
>                                    Dayton Jones  (dj at sgra.jpl.nasa.gov)
>
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