[daip] VPLOT NMAPS

[Eric Greisen]

Hans-Rainer Kloeckner wrote:
> 
> Hi Eric,
> 
> I think the number of CC components is not the issue in this case. The 
> total number of CC components is of the order  of 100 to 200  (In fact 
> most of the facets have empty CC tables, like facet 66,67,68,69).  Could 
> it be something else?
> 
> cheers,
> 
> Hans
> 
> 
> On 28 Jul 2011, at 17:28, Eric Greisen wrote:
> 
>> Hans-Rainer Kloeckner wrote:
>>> Hi Eric et al.
>>> I try to plot my model and the visibilities in VPLOT and it seems 
>>> that there is a restriction I do not understand.
>>> VPLOT will stop accepting fluxes from CC components once I will 
>>> include images (66,67,68,69) that are far off the phase centre 
>>> (please have a look at the attached image; the sup-images do all have 
>>> the same number of CC tables). Just to clarify I used setfc to 
>>> determine the facset.
>>> Including the first 65 images
>>> FACSET: 10.716795 Jy found from 24 components
>>> Now including the first 66 images
>>> FACSET: 0.000000 Jy found from 0 components
>>> I also got a message from FLATN saying that:
>>>         FLATN1: Field 66 not included in output - outside image 
>>>          FLATN1: Field 67 not included in output - outside image 
>>>          FLATN1: Field 68 not included in output - outside image 
>>>          FLATN1: Field 69 not included in output - outside image It 
>>> seems that there is a procedure doing a to restricted job in checking 
>>> if an image is within a certain range of the phase centre of the UV 
>>> data. Maybe this is also related why I get sharp cuts at the borders.
>>> I'm not sure if this is a bug. Could you please provide me with some 
>>> insight.

Okay - I will take another look at VPLOT.  FLATN is a completely 
different story.  It has adverbs that control the output image size, 
cell spacing etc - either defaulting from the first image or usually you 
set IMSIZE.  Your interfering source facets are just further from the 
first image than the IMSIZE you requested and so you are told that facet 
66 et al do not contribute to the output image.

Try a much larger IMSIZE with FLATN.

Eric Greisen