This is the description of the namespace http://docs.g-vo.org/rdf/refposition as of 2019-03-15.
This vocabulary is not yet approved by the IVOA. This means that terms can still disappear without prior notice.
A collection of reference positions in common use in astronomy.
| Predicate | Label | Description | Parent | Preferred |
|---|---|---|---|---|
| TOPOCENTER | Topocenter | The location of the instrument that made the observation | ||
| GEOCENTER | Geocenter | The center of the earth | ||
| BARYCENTER | Solar System Barycenter | The barycenter of the solar system | ||
| HELIOCENTER | Heliocenter | The center of the sun | ||
| EMBARYCENTER | Earth-Moon Barycenter | The barycenter of the Earth-Moon system | ||
| UNKNOWN | Unknown | 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. |