2026-09-11T10:20:39.782281ivo://cdpp/illu67p/q/epn_coreYour organisation's nameBeth Arnaud2026-02-12T09:17:45Beth Arnaud

Imperial College London, Dpt of Physics, Prince Consort Road, SW7 2AZ, London, United Kingdom

abeth@ic.ac.ukcomet67PbodyThanks to the Rosetta mission, we probed the shape of comet 67P / Churyumov-Gerasimenko. During the cruise, observations revealed strong correlations with the illumination conditions of 67P (diurnal and seasonal variations). Thus, it has been necessary to calculate these conditions from the shape model of comet 67P.http://psws-epntap.irap.omp.eu:80/tableinfo/illu67p.epn_coreillu67pThis service provides illumination maps for comet 67P. The information is given as the cosinus of the angle between the normal to each facet of the comet shape model and the Sun direction. The comet shape model has 100k facets and corresponds to CSHP_DV_130_01_______00200. Maps are obtained for all solar latitudes / longitudes with one-degree step for both, in the comet reference frame (C-G_CK as provided by ESA/PSA and obtained through AMDA amda.cdpp.eu). The code is developed by A. Beth, Imperial College. User can access both numerical values and images of the illumination maps, projected in latitude and longitude.ivo://vopdc.obspm/std/EpnCore#schema-2.0illu67p.epn_coreThanks to the Rosetta mission, we probed the shape of comet 67P / Churyumov-Gerasimenko. During the cruise, observations revealed strong correlations with the illumination conditions of 67P (diurnal and seasonal variations). Thus, it has been necessary to calculate these conditions from the shape model of comet 67P.ivo://vopdc.obspm/std/epncore#schema-2.0granule_uidInternal table row index Unique ID in data service, also in v2. Can be alphanumeric.meta.idchargranule_gidCommon to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric.meta.idcharobs_idAssociates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation.meta.idchardataproduct_typeThe high-level organization of the data product, from enumerated list (e.g., 'im' for image, sp for spectrum)meta.code.classEpn.dataProductTypecharnullabletarget_nameStandard IAU name of target (from a list related to target class), case sensitivemeta.id;srcEpn.TargetNamecharnullabletarget_classType of target, from enumerated listmeta.code.class;srcEpn.TargetClasscharnullabletime_minAcquisition start time (in JD)dtime.startdoublenullabletime_maxAcquisition stop time (in JD)dtime.enddoublenullabletime_sampling_step_minSampling time for measurements of dynamical phenomena, lower limit.stime.interval;stat.minEpn.Time.Time_sampling_step_mindoublenullabletime_sampling_step_maxSampling time for measurements of dynamical phenomena, upper limitstime.interval;stat.maxEpn.Time.Time_sampling_step_maxdoublenullabletime_exp_minIntegration time of the measurement, lower limit.stime.duration;obs.exposure;stat.minEpn.Time.Time_exp_mindoublenullabletime_exp_maxIntegration time of the measurement, upper limitstime.duration;obs.exposure;stat.maxEpn.Time.Time_exp_maxdoublenullablespectral_range_minSpectral range (frequency), lower limit.Hzem.freq;stat.minEpn.Spectral.Spectral_range_mindoublenullablespectral_range_maxSpectral range (frequency), upper limitHzem.freq;stat.maxEpn.Spectral.Spectral_range_maxdoublenullablespectral_sampling_step_minspectral sampling step, lower limit.Hzem.freq.step;stat.minEpn.Spectral.Spectral_sampling_step_mindoublenullablespectral_sampling_step_maxspectral sampling step, upper limitHzem.freq.step;stat.maxEpn.Spectral.Spectral_sampling_step_maxdoublenullablespectral_resolution_minSectral resolution, lower limit.Hzspect.resolution;stat.minEpn.Spectral.Spectral_resolution_mindoublenullablespectral_resolution_maxSectral resolution, upper limitHzspect.resolution;stat.maxEpn.Spectral.Spectral_resolution_maxdoublenullablec1minLongitude on body, lower limit.degpos.bodyrc.long;stat.minEpn.Spatial.Spatial_range.c1mindoublenullablec1maxLongitude on body, upper limitdegpos.bodyrc.long;stat.maxEpn.Spatial.Spatial_range.c1maxdoublenullablec2minLatitude on body, lower limit.degpos.bodyrc.lat;stat.minEpn.Spatial.Spatial_range.c2mindoublenullablec2maxLatitude on body, upper limitdegpos.bodyrc.lat;stat.maxEpn.Spatial.Spatial_range.c2maxdoublenullablec3minHeight over defined null, lower limit.mpos.bodyrc.alt;stat.minEpn.Spatial.Spatial_range.c3mindoublenullablec3maxHeight over defined null, upper limitmpos.bodyrc.alt;stat.maxEpn.Spatial.Spatial_range.c3maxdoublenullables_regionObsCore-like footprint, valid for celestial, spherical, or body-fixed frames.phys.outline;obs.fieldcharnullablec1_resol_minResolution in the first coordinate, lower limit.degpos.resolution;stat.minEpn.Spatial.Spatial_resolution.c1_resol_mindoublenullablec1_resol_maxResolution in the first coordinate, upper limitdegpos.resolution;stat.maxEpn.Spatial.Spatial_resolution.c1_resol_maxdoublenullablec2_resol_minResolution in the second coordinate, lower limit.degpos.resolution;stat.minEpn.Spatial.Spatial_resolution.c2_resol_mindoublenullablec2_resol_maxResolution in the second coordinate, upper limitdegpos.resolution;stat.maxEpn.Spatial.Spatial_resolution.c2_resol_maxdoublenullablec3_resol_minResolution in the third coordinate, lower limit.mpos.resolution;stat.minEpn.Spatial.Spatial_resolution.c3_resol_mindoublenullablec3_resol_maxResolution in the third coordinate, upper limitmpos.resolution;stat.maxEpn.Spatial.Spatial_resolution.c3_resol_maxdoublenullablespatial_frame_typeFlavor of coordinate system, defines the nature of coordinates. From enumerated listmeta.code.class;pos.framecharnullableincidence_minIncidence angle (solar zenithal angle) during data acquisition, lower limit.degpos.posAng;stat.minEpn.View_angle.Incidence_angle_mindoublenullableincidence_maxIncidence angle (solar zenithal angle) during data acquisition, upper limitdegpos.posAng;stat.maxEpn.View_angle.Incidence_angle_maxdoublenullableemergence_minEmergence angle during data acquisition, lower limit.degpos.posAng;stat.minEpn.View_angle.Emergence_angle_mindoublenullableemergence_maxEmergence angle during data acquisition, upper limitdegpos.posAng;stat.maxEpn.View_angle.Emergence_angle_maxdoublenullablephase_minPhase angle during data acquisition, lower limit.degpos.phaseAng;stat.minEpn.View_angle.Phase_angle_mindoublenullablephase_maxPhase angle during data acquisition, upper limitdegpos.phaseAng;stat.maxEpn.View_angle.Phase_angle_maxdoublenullableinstrument_host_nameStandard name of the observatory or spacecraft.meta.id;instr.obstyProvenance.ObsConfig.Facility.namecharnullableinstrument_nameStandard name of instrumentmeta.id;instrProvenance.ObsConfig.Instrument.namecharnullablemeasurement_typeUCD(s) defining the data, with multiple entries separated by hash (#) characters.meta.ucdEpn.Measurement_typecharnullableprocessing_levelCODMAC calibration level; see the et_cal note http://dc.g-vo.org/tableinfo/titan.epn_core#note-et_cal for what values are defined here.meta.code;obs.calibintcreation_dateDate of first entry of this granuletime.creationcharnullablemodification_dateDate of last modification (used to handle mirroring)time.updatecharnullablerelease_dateStart of public access periodtime.releasecharnullableservice_titleTitle of resource (an acronym really, will be used to handle multiservice results)meta.titlecharnullableaccess_estsizeEstimated file size in kbyte.kbytephys.size;meta.fileObs.Access.Sizeintnullablefile_nameName of the data file only, case sensitive.meta.id;meta.filecharnullablepublisherA short string identifying the entity running the data service used.meta.refcharnullablethumbnail_urlURL of a thumbnail image with predefined size (png ~200 pix, for use in a client only).meta.ref.url;meta.filecharnullableaccess_urlURL of the data file, case sensitive. Can point to a script.meta.ref.url;meta.fileObs.Access.Referencecharnullablesubsolar_longitudeLatitude of the sun according to 67Ppos.bodyrc.lonfloatnullablesubsolar_latitudeLongitude of the sun according to 67Ppos.bodyrc.latfloatnullableshape_modelThe name of the 3D model from which the illumination maps has been generated.meta.modelcharnullableshape_model_urlThe access URL of the 3D model from which the illumination maps has been generated.meta.ref.url;meta.modelcharnullablespatial_coordinate_descriptionThe coordinate system used for the simulation.meta.code.class;pos.framecharnullable