[daip] UVCON's problem at pointing error

[Subhashis Roy]

Hi,

I believe your conclusion based on the parameters used are correct (I got 
similar results earlier with these parameters).

Now, could you please try using IN2NAME to provide CC based model with 
NMAPS=2 or 3 ?

The map centres need to have Offset w.r.t. each other (say 
~1000") [e.g., you can have 1 point src of 1 Jy at the centre of each 
fields, while the field centres are 1000" off in DEC].

Do the generated UV data appear sensible ?
(I find that it neglects the offsets of the fields while doing FT of the 
Clean comps.).

Subhashis

On Tue, 8 Feb 2011, Leonia Kogan wrote:

> Roy,
>
> I have not paid attention on your point model being shifted by 2000asec> 0.5 
> degrees. I thought the source is just at the center. So my conclusion about 
> the negligence of the pointing error is almost wrong :(
>
> Now I have carried out the test of UVCON using the GMRT configuration you 
> sent me.
>
> The result:
>
> 1.Using BPARM=-1,0 I got the amp of visibilities =1 elwhere as it is 
> expected. BPARM(6) = 0 => no multiplication by the primary beam (see help)
>
> 2. Using your input for UVCON I got the amp =~0.3 for the baseline3-4.
>   this value is changed every 10min. (I used the tolerance=BPARM(7)=10mins). 
> See the help for the tolerance. The change of the Vis amp between the 
> tolerance interval is ~0.015 (as an example from 0.316 to 0.311 This is the 
> effect of random pointing error).
>
> So I conclude, UVCON does not have a problem at the pointing error area!!!!!! 
> :) I do not have an idea, why UVCON did not work at you hands.
>
> I am waiting now other possible UVCON problem. Please one by one not all 
> together.
>
> Thanks
>
> LK
>