SsaInterface - IVOA - i v o a . n e t

Collaborative Page for SSA Interface

The Simple Spectral Access interface (SSA) defines a uniform interface to simple 1D spectra, with extensions planned also for time series, and SEDs. It shares many similarities with the Simple Image Access (SIA) and Simple Cone Search (SCS) specifications.

SSA is now an IVOA Recommendation. The most recent version of the document can be found here.

SSA update collaboration page

New minor version of the SSA v1.1 specification is being produced, including some minor fixings. http://www.ivoa.net/cgi-bin/twiki/bin/view/IVOA/SSA_v1_1

Older Documents

Proposed Recommendation for the SSA query interface (September 17, V1.02)
Proposed Recommendation for the Spectrum data model (September 13, V1.02)
Reference SSAP Services. These provide a working example of the current query interface and query response for reference.
A spreadsheet summarizing the overall SSAP and Spectrum data models.
A good overview of the DAL protocols, with a focus on spectral access, is given in this paper.

SsaResourceSchema: discussion of a VOResource extension schema for describing SSA services in the Registry.

- DougTody February 2008

Related Material

Allen, M., Boch, T., 2003, Plotting SEDs in the AVO prototype: Catalog Requirements, Conventions and Conversions, http://www.euro-vo.org/internal/Avo/WorkPackageTwoTwo/SEDs_in_AVO.pdf
Berners-Lee et al. 1994, Uniform Resource Locators (URL), IETF RFC 1738, http://www.ietf.org/rfc/rfc1738.txt
Bonnarel, F. et al., 2004, Proposal for an evolution of the SIA protocol V1.00, http://www.ivoa.net/Documents/latest/SIAPEvol.html
Bradner et al. 1997, Key words for use in RFCs to Indicate Requirement Levels, IETF RFC 2119, http://www.ietf.org/rfc/rfc2119.txt
Bunclark, P., Rots, A. 1996, Precise re-definition of DATE-OBS Keyword encompassing the millennium, http://www.cv.nrao.edu/fits/documents/standards/year2000.txt
Derriere, S., Preite Martinez, A., Williams, R. 2004, Work in progress: UCD (Unified Content Descriptor) - moving to UCD1+, http://www.ivoa.net/Documents/PR/UCD/UCD-20041026.html
Dolensky, M., Tody, D., 2004, Survey among Spectral Data Providers and Consumers, ASP Conf. Ser., 314, 338, (see topic SsaSurvey)
McDowell, J. et al. 2004, IVOA SED Data Model
Ochsenbein, F. et al., 2004, VOTable Format Definition V1.1, http://www.ivoa.net/Documents/REC/VOTable/VOTable-20040811.html
Osuna, P., Salgado, J. 2004, Simple Spectral Access for ISO data V1.0, http://www.ivoa.net/Documents/latest/SADimEq.html
Rots, A., Space-Time Coordinate Metadata for the Virtual Observatory V1.10, http://www.ivoa.net/Documents/latest/STC.html
Tody, D., Plante, R. 2004, Simple Image Access Specification V1.0, http://www.ivoa.net/Documents/WD/SIA/sia-20040524.html
Valdes, F. 2003, A Virtual Observatory Data Model, http://iraf.noao.edu/projects/vo/dal/datamodel.html