[evla-sw-discuss] Keeping track of spectral windows at the EVLA: SDM vs. BDF

[Barry Clark]

I could be wrong but I think the OPT internally uses baseband names
A0/C0 (implying 8 bit), A1/C1, A2/C2.  Executor uses internally
A/C (implying 8bit), A1/C1, A2/C2.  Might be nice to have a system-
wide convention.  Does C++ also forbid the other nice characters
that one might use instead of '/', like '&' or '-'?  In desperation,
maybe 'AwC'.

Because of the switch arrangement in the T304, A/C implies that A1/C1
and A2/C2 cannot occur, so not to worry about sorting on those.
A/C + B1/D1 + B2/D2 we do plan to support.  As I've said before, I
think we should disallow thinking about single basebands, rather than
baseband pairs, and so not worry about abominations like A/C2.

Configuration name.  Is this just a string?  Anyhow, I propose to
put it in the parmenator table, and let the operators update it,
and then to send it along in the observation document.  It would
also be used by the Scheduler, so would include names like 'D=>DNC'
for things that can be scheduled in move time.  Not very urgent, but
might get done by D=>DnC move....

aborted -- Not there now, but could be added without much work on
my part, at least for "aborted by operator".

Since we are contemplating adding/subtracting antennas in the long
term, we will need to do bookkeeping on numAntenna, rather than just
taking the first one that comes along.  (What is this to be used for,
anyhow?).

I must say that there are a lot of things that we seem to be cheerfully
defaulting to "don't care" that I find very hard to think of a use
for so valuable as to justify the software effort of actually using
them.

Sonja, when you update the VCI schema, let me know where to find it -
Executor is currently pointing to 3.5.1 (which I would leave for the
standard Executor, but point the test version at wherever I need to
get the new stuff.

Michael Rupen wrote:
> Hi folks --
> 
>   please find attached a portion of the SDM intro document dealing
> with the association between spectral windows in the SDM, and those
> in the BDF.  A previous iteration was approved by Francois so I think this
> is kosher.  Note that there are subsections at the beginning & end you
> probably don't care about at the moment.  Much of the rest of this
> message is detailed and EVLA-centric; I've cc'd several CASA and ALMA
> folks in case they have comments, since this affects the filler at least.
> 
[snip]