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< < | Discussion in Nara initiated by Arnold and Igor showed that most people consider the RadVel axis to be different from the spectral axis. The argument being that we are facing two non permutable quantities as long as we are not considering a single , isolated spectral line. | |||||||
> > | Discussion in Nara initiated by Arnold and Igor showed that most people consider the RadVel axis to be different from the spectral axis. The argument being that we are facing two non permutable quantities as long as we are not considering a single , isolated spectral line. | |||||||
Changed: | ||||||||
< < | Upcoming version 2 of characterisation DM will add a new RadVel or Doppler axis. It would be perfectly possible to add a couple of optional fields allowing to search against "radial Velocity" bounds and resolution... | |||||||
> > | Upcoming version 2 of characterisation DM will add a new RadVel or Doppler axis. It would be perfectly possible to add a couple of optional fields allowing to search against "radial Velocity" bounds and resolution... | |||||||
This is the minimum required to fulfill the use cases 3.2 and 3.4.
-- JuanDeDiosSantanderVela - 16 Mar 2011
In order to make a concrete proposal, I would propose the following fields:
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< < |
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> > |
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Changed: | ||||||||
< < | Use Case 3.2 | |||||||
> > | Use Case 3.2 | |||||||
Show me a list of all data that satisfies: | ||||||||
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< < |
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> > |
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select * from ivoa.obscore
where dataproduct_type = 'image-spectrum'
and vel_resolution < 50000 | ||||||||
Changed: | ||||||||
< < | and (contains(s_region,point(16,+41)) | |||||||
> > | and (contains(s_region,point('ICRS',16,+41)) = 1 | |||||||
or distance(point(s_ra,s_dec),point(16,+41)) < s_fov
)
Condition 1 is dealt with by dataproduct_type field; condition 2 is dealt with by the fact that NULL vel_resolution fields will not contribute to the comparison; conditions 3 and 4 are taken care of at the same time as 6 and 7, by the contains or distance. The contains or distance is used to allow for services with non-precise regions, but that they still might have a chance of including the point. | ||||||||
Added: | ||||||||
> > |
Use Case 3.4
select * from ivoa.obscore
where dataproduct_type = 'image-spectrum'
and vel_resolution < 1000
and vel_min < 6000
and vel_max > 10000
and em_min < 299792458/345.795990e9
and em_max > 299792458/345.795990e9
and (contains(s_region,point('ICRS', 83.835000,-5.014722)) = 1
or distance(point(s_ra,s_dec),point(83.835000,-5.014722)) < s_fov
)
Could anyone please check that the query indeed corresponds to the use case? Best regards! | |||||||
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