| access_estsize -- Estimated file size in kbyte. |
| access_format -- File format type (RFC 6838 Media Type a.k.a. MIME type) |
| accref -- Access key for the data |
| bib_reference -- Bibcode or DOI preferred if available, or other bibliographic identifier or URL |
| c1_resol_max -- Resolution in the first coordinate, upper limit |
| c1_resol_min -- Resolution in the first coordinate, lower limit. |
| c1max -- Right Ascension (ICRS), upper limit |
| c1min -- Right Ascension (ICRS), lower limit. |
| c2_resol_max -- Resolution in the second coordinate, upper limit |
| c2_resol_min -- Resolution in the second coordinate, lower limit. |
| c2max -- Declination (ICRS), upper limit |
| c2min -- Declination (ICRS), lower limit. |
| c3_resol_max -- Resolution in the third coordinate, upper limit |
| c3_resol_min -- Resolution in the third coordinate, lower limit. |
| c3max -- Distance from coordinate origin, upper limit |
| c3min -- Distance from coordinate origin, lower limit. |
| creation_date -- Date of first entry of this granule |
| dataproduct_type -- 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. |
| emergence_max -- Emergence angle during data acquisition, upper limit |
| emergence_min -- Emergence angle during data acquisition, lower limit. |
| file_name -- Name of the data file only, case sensitive |
| filter -- Identifies filter in use, typically for images |
| granule_gid -- Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric. |
| incidence_max -- Incidence angle (solar zenithal angle) during data acquisition, upper limit |
| incidence_min -- Incidence angle (solar zenithal angle) during data acquisition, lower limit. |
| instrument_host_name -- Standard name of the observatory or spacecraft |
| instrument_name -- Standard name of instrument |
| measurement_type -- UCD(s) defining the data, with multiple entries separated by hash (#) characters. |
| modification_date -- Date of last modification (used to handle mirroring) |
| obs_id -- Associates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation. |
| obs_mode -- Observing mode |
| orientation -- Position angle of an image y-axis, in direct sense from north |
| phase_max -- Phase angle during data acquisition, upper limit |
| phase_min -- Phase angle during data acquisition, lower limit. |
| pol_states -- List of polarization states in the data set |
| pol_xel -- Number of elements (typically pixels) along the polarization axis. |
| processing_level -- Dataset-related encoding, or simplified CODMAC calibration level |
| publisher -- A short string identifying the entity running the data service used |
| release_date -- Start of public access period |
| s_region -- ObsCore-like footprint, valid for celestial, spherical, or body-fixed frames |
| service_title -- Title of resource (an acronym really, will be used to handle multiservice results) |
| spatial_coordinate_description -- ID of specific coordinate system and version or properties. |
| spatial_frame_type -- Flavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined. |
| spatial_origin -- Defines the frame origin |
| spectral_range_max -- Spectral range (frequency), upper limit |
| spectral_range_min -- Spectral range (frequency), lower limit. |
| spectral_resolution_max -- Spectral resolution, upper limit |
| spectral_resolution_min -- Spectral resolution, lower limit. |
| spectral_sampling_step_max -- Spectral sampling step, upper limit |
| spectral_sampling_step_min -- Spectral sampling step, lower limit. |
| target_class -- Type of target, from a controlled vocabulary. |
| target_name -- Standard IAU name of target (from a list related to target class), case sensitive |
| time_exp_max -- Integration time of the measurement, upper limit |
| time_exp_min -- Integration time of the measurement, lower limit. |
| time_max -- Acquisition stop time (in JD), as UTC at time_refposition |
| time_min -- Acquisition start time (in JD), as UTC at time_refposition |
| time_sampling_step_max -- Sampling time for measurements of dynamical phenomena, upper limit |
| time_sampling_step_min -- Sampling time for measurements of dynamical phenomena, lower limit. |
| time_scale -- Defaults to UTC in data services; takes values from http://www.ivoa.net/rdf/time_scale otherwise |
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