This is an old revision of the document!
Hack-a-thon Page
Participants - please go ahead and develop these Hack-a-thon topics, and use this page to provide notes
(If you need an ASTERICS wiki account, please email mark.allen@astro.unistra.fr)
Tuesday 26 th at 4:30 PM
I ) ObsCore and other VO standards in the context of EST and solar data
Participants Morten Frantz, Marco Guenter, Thomas Hederer, François Bonnarel
Discussion was about how Solar data can be described and discovered using an ObsCOre/EPNTAP strategy.
Spectral data at KIS (and probably also fo EST) are produced by combination of spatial/spectral measurements at different time. The time differentiation may be missed inside the datasets. The Polarization is also available These datasets may be made available as 4D FITS cubes. Sequences of observation at several times may also be gathered in the same cube, which may be seen as a TimeSeries of 3D or 4D cubes. Description of all this should fit with ObsCore but has to be prototyped. Spatial constraints would however require the possibility to use any of the coordiate systems attached to the SUN body. EPNTAP solutions have to be explored ( see: https://arxiv.org/abs/1407.5738 )
Extract data subset around a sunspot could be seen as some kind of extension of sODA functionality. Has to be checked
Links to useful documents:
- Link to the VO standard document collection: [http://www.ivoa.net/documents/]]
- Obscore (metadata describing a dataset): http://www.ivoa.net/documents/ObsCore/20170509/index.html
- UCDs - Unified Content Descriptor (standard vocabulary for quantities): http://www.ivoa.net/Documents/latest/UCD.html
- CDS VizieR service: http://vizier.u-strasbg.fr/viz-bin/VizieR
- To see the catalogues from the Solar field: choose Sun in Astronomy
- To see the UCD tree and explore it: Search catalogues by column description
- Example of ReadMe file describing a catalogue: http://cdsarc.u-strasbg.fr/viz-bin/ReadMe/J/ApJS/183/225?format=html&tex=true
- Registry
- IVOA: resource metadata http://www.ivoa.net/documents/RM/20070302/index.html
- Europlanet (planetary sciences): EPN-TAP
- Technical description: https://voparis-confluence.obspm.fr/display/VES/EPN-TAP+V2.0+parameters
- “Descriptive” description: https://voparis-confluence.obspm.fr/display/VES/EPN-TAP+v2+parameter+description
- IVOA Document Standards (IVOA processes to define its standards): http://www.ivoa.net/documents/DocStd/20170517/
II ) How should services and clients behave on the transition from ADQL-2.0 to ADQL-2.1 (in particular wrt TAP's LANG parameters)?
Wednesday 27 th at 2 PM : Tme Series + time Salle de réunion downstairs
Ada, Mireille, Laurent, Marco (?) , Markus (?),François, Dave (?) to discuss TimeSeries next steps.
Topics :
DAL access
Mapping
Utypes
Wednesday 27 th at 4 PM : Provenance next steps Salle de Cours
Laurent, Mireille, François + Nicolas Renault Tinacci, Markus Nullmeier to discuss Provenance next steps.
implementation CTA at LUPM Montpellier shown by Nicolas Renault Tinacci ( LUTH)
Demo of a database instance in Jupyter Note book
Implementation test for an activity extracting Muons’ signal from a raw observation
All DM classes implemented. ParameterDescription This re-uses some provenance classes from CTA pipe library and adds some to be compliant to the model.
Mathieu Servillat &Catherine Boisson work in another part of the pipeline , on advanced analysis steps of gamma ray data gamma_py package
Some features : roles depend on the activity description e.g role = dl0.subevent could be published as a vocabulary with a name space cta:dl0.subevent
In this example execution config attributes are embedded into the instance of Activity
Parameter not implemented in this instance because not needed . question : is it using default values? then these can be discovered via the ParameterDescription links , but the Activity —> parameter link should tell it . e.g param_default =true in Activity
* config repository: All configs for activities are stored in a specific system, and re-used when necessary via copy or via reference comment by Laurent : how to store provenance objects Elements with diffrent life cycles , like parameters attached to an Activity should be stored in a different class / table than long lasting elements . They disapear with their related Activity.
* CTE functions for recursive queries in ADQL Markus Nullmeir will write some documentation for them and provide examples .
will be tried in Prov-Tap prototype.
Wednesday 27 th at 4 PM : Platforms Salle de réunion dowstairs
Zheng, Dave, Sara, Stelios … general discussion on science platforms, what they are, what our users need, what technologies are available and how we can make them interoperable. (Mark A.)
Wednesday 27 th after Provenance: after the Provenance hack-a-thon ~5pm
If needed : François + … to discuss Multi-D standards status an next steps. Planning for the radio meeting tomorrow —> Cancelled. No participants
Wednesday 27: Transition to ESCAPE:
Francoise (not available during Tuesday 26 Hack-a-Thon), Marco + …
