[mmaimcal]RE: [alma-sw-ssr]antenna numbering scheme

[Wim.Brouw at csiro.au]

Bryan,

> -----Original Message-----
> From: alma-sw-ssr-admin at donar.cv.nrao.edu 
> [mailto:alma-sw-ssr-admin at donar.cv.nrao.edu] On Behalf Of Bryan Butler
> Sent: Wednesday, 05 May 2004 02:24
> To: mmaimcal at nrao.edu; almasci at nrao.edu; alma-sw-ssr at nrao.edu
> Subject: [alma-sw-ssr]antenna numbering scheme
> 
> 
> 
> all,
> 
> the control software group has had a discussion on how to "number" 
> antennas - the issue is whether to start with 0 (the 
> "computerese" way 
> of doing it) or to start with 1 (the "classic" way of doing it).  all 
> current interferometers that i've had any experience with 
> start with 1. 

The 'classic' way (i.e. before the eighties) was to start with '0' (e.g.
WSRT). Was done by astronomers and engineers; not computer people.
Has never been questioned or caused problems


Wim




>   i don't know about CLIC/Gildas and GIPSY, but AIPS, AIPS++, 
> and miriad 
> all start with 1.  because of this, i've said to the control 
> s/w group 
> that we, as astronomers, would probably prefer to see things starting 
> with antenna number 1.  it's not a big deal, but one they 
> want to settle 
> pretty soon, as it propagates down through the code (as a side note, 
> they do not want to have a translation layer where to the 
> astronomer it 
> looks like things start at 1 whereas in the actual code they 
> start at 0).
> 
> any comment?
> 
> 	-bryan
> 
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