Re: [alma-sw-ssr] Offline and Pipeline Requirements

[Steve Scott <scott@ovro.caltech.edu>]

Hi Mark,

I would think that if you can measure the pointing errors then you
should correct the pointing in realtime and then not have to deal with
them in the imaging. From the science requirements you can infer how
often the pointing needs to be refined.

Steve


Mark Holdaway wrote:
> 
> Mel,
> 
> I think the whole point is that we can't allow our experience with a 9
> element interferometer with maximum dynamic range of 200:1 to limit our
> understand of what is required of the data reduction on a 64 element
> interferometer which will potentially have a dynamic range of many
> thousands to one.
> 
> If there is any hope of correcting for pointing errors, it is through
> algorithms which combine pointing self-calibration with the deconvolution,
> ie, knowledge of the visibility data is directly tied together with the
> process of imaging and deconvolution.  This is the strength of AIPS++,
> and it will be somewhat difficult for less developed radio-synthesis
> software to deal with such problems and impossible for software such
> as IDL to deal with them.
> 
>         -Mark