Reference Positions
type: Ontology
created: 2019-03-15
creator: Rots, A.
creator: Demleitner, M.
license: http://creativecommons.org/publicdomain/zero/1.0/
description: Names of positions observations are reduced to. These are used, e.g., in VOTable 1.4 TIMESYS/@refposition. See also http://www.iaufs.org/res.html.
vocflavour: RDF Class

Unknown
type: Class
comment: The times cannot be transformed to a different reference position reliably. This is to be used for simulated data or for data for which the reference position has been lost.

Earth-Moon Barycenter
type: Class
comment: The barycenter of the Earth-Moon system

Geocenter
type: Class
comment: The center of the earth

Topocenter
type: Class
comment: The location of the instrument that made the observation

Heliocenter
type: Class
comment: The center of the sun

Solar System Barycenter
type: Class
comment: The barycenter of the solar system