Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..633r&link_type=abstract
Highlights of Astronomy, Volume 14 IAU XXVI General Assembly, 14-25 August 2006 Karel A. van der Hucht, ed., p.633
Astronomy and Astrophysics
Astronomy
Scientific paper
Space-time coordinate metadata are at the very core of understanding astronomical data and information. This aspect of data description requires very careful consideration. The design needs to be sufficiently general that it can adequately represent the many coordinate systems and conventions that are in use in the community. On the other hand the most basic requirement is that the space-time metadata for queries, for resource descriptions, and for data be complete and self-consistent. It is important to keep in mind that space, time, redshift, and spectrum are strongly intertwined coordinates: time has little meaning without knowing the location, and vice-versa; redshift and spectral data require position and velocity for correct interpretation. The design of the metadata structure has been completed at this time and will support most, if not all, coordinate systems and transformations between them for the Virtual Observatory, either immediately or through extensions. This work has been supported by NASA under contract NAS 8-03060 to the Smithsonian Astrophysical Observatory for operation of the Chandra X-ray Center.
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