[Difx-users] difx2mark4 bug {External}

[Alexey Melnikov]

Hi,

My understanding is that SCHED is doing all correctly, it produces VEX by
using catalogs, preserving original case from the catalogs.

This is looks like an action item for the next DiFX users/developers meeting
at least, or even to the whole VLBI/Radio community.


On 20240214 10:19:08, Jay Blanchard via Difx-users wrote:
> There's been a little bit of work by Walter and I (mostly Walter) to reduce
> reliance on station codes/name in difx2fits in favour of position/reference.
> We've noted for example that there will likely be two 'Kp' stations soon:
> Kitt Peak and KVN PyeongChan.
> With respect to SCHED - if we reach some conclusion on preferred case SCHED
> could be updated to match that.
> In other words don't feel like what SCHED does needs to be the standard.
> 
> On Wed, 14 Feb 2024 at 10:08, Leonid Petrov via Difx-users <
> difx-users at listmgr.nrao.edu> wrote:
> 
> > Geff et al,
> >
> >    There is number of other instances  when we deal with station
> > codes in both schedule preparation, schedule validation, data
> > analysis, etc. And everywhere we compare station names. I would
> > like to agree upon on a convention for  the station name case.
> > One convention will be considered standard, all other non-standard.
> > Then we can gradually examine code and replace non-standard treatment
> > with standard. If you remember time when FORTRAN (with all capital
> > letters) did not understand small letters, you may remember time when
> > there was a mess between RCP and LCP conventions. Then a IEEE
> > convention has been established and folks can say: our receiver gets
> > RCP defined in accordance with the IEEE conventions. I want to have the
> > same convention here. Then we can tell we use station code according
> > to the DiFX convention.
> >
> > Leonid
> > 2024.02.14_12:03:55
> >
> >
> > > On 2024-02-14 10:43, Geoffrey B. Crew via Difx-users wrote:
> > > I knew I was opening a can of worms on this one.  As a relative
> > > new-comer I was bit by this sort of thing a few times...and just
> > > assumed I was the only one confused.  Now I understand:
> > >
> > > Fortran did not have good string handling and the (original) character
> > > set was limited; hence capitalization in AIPS.  VEX came later,
> > > particularly after K&R decided character (string) handling was
> > > something that needed to be fixed in C and there is no fixed
> > > convention other than Vex can handle mixed case and AIPS cannot.
> > >
> > > With arrays such as SKA, ngVLA, &c under discussion, it seems that
> > > perhaps 2 characters are not enough and some guidance within the DiFX
> > > code base on "what is the plan" might not be a bad idea so that the
> > > developers can move into some coherence in the future.
> > >
> > > And if AIPS is to survive into that era, some sort of mapping of
> > > station codes into all-upper-case two letter codes might eventually be
> > > necessary.  difx2mark4 already has an option to provide a map of
> > > two-letter codes to one letter codes.  (And we already decided HOPS4
> > > isn't going care and will use what is in the VEX.)
> > > Somewhat earlier Leonid wrote:
> > >
> > >>> Dear colleagues,
> > >>>
> > >>> Can you clarify, is there a convention on a case of two-letter
> > >>> station
> > >>> codes:
> > >>> gs, GS, or Gs?
> > >
> > > --
> > > Geoff Crew
> > > MIT Haystack Observatory
> > > gbc at mit.edu
> > > (NOTE NEW EMAIL: gbc at haystack is no longer reliable)
> > > _______________________________________________
> > > Difx-users mailing list
> > > Difx-users at listmgr.nrao.edu
> > > https://listmgr.nrao.edu/mailman/listinfo/difx-users
> >
> > _______________________________________________
> > Difx-users mailing list
> > Difx-users at listmgr.nrao.edu
> > https://listmgr.nrao.edu/mailman/listinfo/difx-users
> >

> _______________________________________________
> Difx-users mailing list
> Difx-users at listmgr.nrao.edu
> https://listmgr.nrao.edu/mailman/listinfo/difx-users


-- 
Best regards,
Alexey Melnikov, Scientific Researcher
Laboratory of Radio Astronomy Observations
The Institute of Applied Astronomy RAS
St.-Petersburg, Russia, tel. +7 (812) 2751106


Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html