VOEvent used for solar knowledge base

[Frederic V. Hessman]

>> I include a "simple" SOHO-EIT RTML document which covers the  
>> corresponding content so that most of this <How> becomes unnecessary.
>
> I think this is a separate conversation between you and Elizabeth.   
> I don't think the context of Elizabeth's message was looking for  
> alternatives to the LMSAL schema for these packets, but it's great  
> if RTML is general enough to support this usage.  Different  
> communities outside the traditional RTML bailiwick will likely  
> already have their own instrument control/observation definition  
> schema, that could most simply just be accepted as is.  (I'd be  
> deeply skeptical about permitting alternatives to STC, however.)   
> The nature of the <How> element is to require some level of  
> application specific expertise to use productively, in any case.   
> The common scaffolding of VOEvent packet handling rests largely  
> with the other elements.

I wasn't expecting LMSAL to throw out their schema (although I  
wouldn't mind) - the point was to show that the conversion could be  
easily made, so LMSAL could easily produce a filter which converts  
their internal document to a public one so that they could publish  
the details in a VOEvent-compatible format outside the trivially  
generated but generally unparseable <Group>'s and <Param>'s.   With  
archival analyses of SOHO data, this is not very exciting, but when  
STEREO starts to produce real-time events, it might be nice to be  
able to parse the basic observational parameters like wavelengths of  
filters without knowing all the different internal schemata.

>> Also, multi-telescope spacecraft may be better described using the  
>> following construct (also not yet kosher):
>>
>> 	<Device type="spacecraft">
>> 		<Telescope name="EIT">
>> 			...
>> 		</Telescope>
>> 	</Device>
>
> The ground-based equivalent in NOAO's data model would be "site".   
> An observatory has multiple sites, a site has multiple telescopes,  
> a telescope has multiple instruments, etc.  Instruments are often  
> shared between telescopes, so could be matrixed in a different way,  
> but since the precise behavior of the instrument often changes due  
> to f-ratio, etc., it is just as reasonable to regard Mosaic-I @  
> Mayall (4m) as distinct from Mosaic-I @ WIYN-0.9m.  Of course, with  
> modern block scheduling a telescope is typically shared between  
> multiple institutions, too.  WIYN is in effect a time-share  
> telescope between its partners, all the way down to the copyright  
> of resulting data.  And sites often host resources from multiple  
> observatories.  It's all very incestuous.

Hmmmm......  this would give us explicit structure, but I guess that  
this information is generally not needed for ground-based  
telescopes.   With SOHO, the telescopes all have to look in the same  
direction, so the organization via <Device> makes sense where as

	<Observatory name="ESO">
		<Site name="Cerro Paranal">
			<Telescope name="Antu"/>
			<Telescope name="Kueyen"/>
			<Telescope name="Melipal"/>
			<Telescope name="Yepun"/>
		</Site>
	</Observatory>

is formally correct but who cares, at least for RTML, VOEvent or HTN  
purposes?    Well, maybe but just maybe for VLTI purposes, but then  
one could use

	<Device name="VLTI" type="interferometer">
		<Telescope name="Antu"/>
		<Telescope name="Kueyen"/>
		<Telescope name="Melipal"/>
		<Telescope name="Yepun"/>
	</Device>

which makes useful sense.

>> The current proto-proposal for an appropriate "Standard  
>> Vocabulary" description fits easily and would be
>>
>> 	ucd="phys.magneticField;morphology.loop"
>
> Cool.

Looks like Andrea should be able to present SV at the next inter- 
whatever meeting.

Rick


------------------------------------------------------------------------ 
------------------------
Dr. Frederic V. Hessman     Hessman at Astro.physik.Uni-Goettingen.DE
Institut für Astrophysik          Tel.  +49-551-39-5052
Friedrich-Hund-Platz 1         Fax +49-551-39-5043
37077 Goettingen                 Room F04-133
http://www.Astro.physik.Uni-Goettingen.de/~hessman
------------------------------------------------------------------------ 
-------------------------
MONET: a MOnitoring NEtwork of Telescopes
http://monet.Uni-Goettingen.de
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