[daip] PCCOR question

[Leonia Kogan]

Dayton,

I have loadded your fits file in AIPS and printed out the PC table.

I see now the format of your PC table: CABLE_CAL =0sec;  PC_FREQ=0Hz; 
PC_REAL, PC_IMAG= something

It is very different of what I expected to see and very different of the 
standard PC table we obtain from VLBA correlator.  PCCOR uses usually 
more than one tone for each IF and uses the relevant frequencies for 
each tones.
I thoght that your cable delay is at the CABLE_CAL column of the PC 
table and thought about modification of the PCCOR to apply the CABLE_CAL 
column only.

Now when I see the actual format I think it is not good idea to add the 
option in PCCOR for reading such an unusual PC table. PCCOR is very 
complicate task and reading the unstandard PC table like yours will 
require too much of modiification which will put PCCOR to far from the 
main pass of its using.

I want to offer you to create SN table with your real and imag colums as 
the relevant column of the SN table.

There are several ways to create it by hand: SNEDT, TBIN, TBOUT....

Leonia


Dayton Jones wrote:

>>Hi Dayton,
>>
>>There is a confusion with a cable delay.
>>
>>PC table as it is used for VLBA data has a cable delay which is the same for all IFs for the given time.
>>It is given in seconds, not in "tne pair of real and imaginary values per antenna per time interval"
>>It looks likes that your "cable" delay is put in the pulse cal tone column of the PC table having one tone only?
>>Is it true?
>>I think such a format is far from the PCCOR concept but still I'd like to see your PC table output.
>>
>>Can you send it to me please?
>>
>>Leonia
>>    
>>
>
>
>The FITS file is attached.  The data from our round-trip cable phase
>detector shows up in the PC table in AIPS; a listing of the PC table
>entries from PRTAB is also attached.  What I am trying to do is take
>the data from our phase detectors (real and imaginary outputs, so the
>corresponding phases are atan2(Im/Re) for each antenna) and either
>add or subtract them from the phases in the uv binary table.  PCCOR
>seemed like the obvious task to do this, but perhaps there is a better
>way.  Cheers,
>              Dayton
>