The EPNCore metadata dictionary defines the core components that are necessary to perform data discovery in the Solar System related science fields. It includes parameters to describe data products coverage (temporal, spectral, spatial, photometric), origin (instrument, facility), content (target, physical parameters), access, references. Its implementation with TAP (Table Access Protocol) is described in the IVOA EPN-TAP: Publishing Solar System Data to the Virtual Observatory document, which includes service registration guidelines and topical extension metadata dictionaries.
Standard IAU name of target (from a list related to target class), case sensitive
Acquisition stop time (in JD), as UTC at time_refposition
Associates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation.
Sampling time for measurements of dynamical phenomena, lower limit.
Internal table row index, which must be unique within the table. Can be alphanumeric.
Sampling time for measurements of dynamical phenomena, upper limit
The high-level organization of the data product, from a controlled vocabulary (e.g., 'im' for image, sp for spectrum). Multiple terms may be used, separated by # characters.
Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric.
Type of target, from a controlled vocabulary.
Spectral range (frequency), upper limit
Acquisition start time (in JD), as UTC at time_refposition
Spectral sampling step, lower limit.
Spectral sampling step, upper limit
Spectral resolution, upper limit
Spectral range (frequency), lower limit.
Integration time of the measurement, upper limit
Spectral resolution, lower limit.
Integration time of the measurement, lower limit.
Latitude on body, lower limit.
Longitude on body, lower limit.
Latitude on body, upper limit
Longitude on body, upper limit
Incidence angle (solar zenithal angle) during data acquisition, upper limit
Resolution in the second coordinate, upper limit
Resolution in the second coordinate, lower limit.
Emergence angle during data acquisition, lower limit.
Resolution in the first coordinate, upper limit
Incidence angle (solar zenithal angle) during data acquisition, lower limit.
Altitude from reference surface, upper limit
Flavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined.
Phase angle during data acquisition, lower limit.
Altitude from reference surface, lower limit.
Resolution in the third coordinate, lower limit.
Resolution in the third coordinate, upper limit
ObsCore-like footprint, valid for celestial, spherical, or body-fixed frames
Emergence angle during data acquisition, upper limit
Resolution in the first coordinate, lower limit.
Phase angle during data acquisition, upper limit
Dataset-related encoding, or simplified CODMAC calibration level
Standard name of the observatory or spacecraft
Date of first entry of this granule
Date of last modification (used to handle mirroring)
Standard name of instrument
UCD(s) defining the data, with multiple entries separated by hash (#) characters.
Start of public access period
Title of resource (an acronym really, will be used to handle multiservice results)
