[daip] BL111E FITS archive

[Yuri Y. Kovalev]

Thank you very much, Eric, for this extensive explanation which 
helped me a lot.

With best wishes to Christmas,
Yuri

On Thu, 18 Dec 2008, Eric Greisen wrote:

> Yuri Y. Kovalev wrote:
> > Dear Eric,
> > 
> > Thank you very much for your comment!
> > 
> > BL111E is a standard MOJAVE-1 15 GHz VLBA project segment (one correlator
> > pass, single frequency setup, continuum, with cross-pol). I would appreciate
> > if someone could take a look at it. I still hope that I did something wrong
> > and you will manage to put it together. Thanks
> 
> I have loaded the 26 files associated with this group of data.  I note that
> there are a variety of possible problems in that some of the 26 cover the same
> time ranges and hence are clearly re-correlations perhaps with changed
> parameters.  There are 3 files output - one has 1715849 visibilities with 16
> spectral channels each 500 kHz wide.   The others are musch smaller - 2nd with
> 93090 visibilities, full polarization and 128 spectral channels each 62.5 kHz
> wide and the 3rd with 17349 visibilities, one polarization and 512 spectral
> channels each 15.6 kHz wide.
> 
> These 2nd and 3rd files cannot and should not be merged in any way with the
> first.  Note that the archive does contain files that fully overlap or nearly
> so - these are re-correlations and you will need to find out
> what the reason for this might have been.  I would omit the early correlations
> and take only the latest for each time range.
> 
> The big first file which is damaged by me loading everything is what you want
> - there should be no need for merging of any sort.  Perhaps the large numbers
> of channels in the 2 extra files were part of a fringe search or some such.
> 
> I see no reason why you should not use VLBALOAD on these data from IDI format
> - but you should carefully select the files from the archive.
> 
> Eric Greisen
> 
>