Group formivo://ksb-orb.dc/uset_sunspot_group/q/usetsgSIDC: Solar Influences Data analysis CenterSabrina Bechet2026-04-02T15:00:03ZVeronique Delouille

Royal Observatory of Belgium, Avenue circulaire 3, 1180 Bruxelles, BELGIQUE

sidc-support@oma.bethe-sunsolar-atmospheresolar-physicssolar-system-astronomyUSET Group formhttp://vo-tap.oma.be/uset_sunspot_group/q/usetsg/infoGeneralUniversityResearchThis research has been made at the Royal Observatory of Belgiumuset_sunspot_group *** USET Groups *** Values in the USET sunspot group catalog are derived from the solar drawings obtained by the Uccle Solar Equatorial Table (USET) facility that is located at the Royal Observatory of Belgium. The USET sunspot group catalog covers 82 years of observations in 2021, and is updated every day. A home-made software (DigiSun) written in Python is used to derive quantities such as location and areas from the sunspot drawings.uset_sunspot_group.epn_core *** USET Groups *** Values in the USET sunspot group catalog are derived from the solar drawings obtained by the Uccle Solar Equatorial Table (USET) facility that is located at the Royal Observatory of Belgium. The USET sunspot group catalog covers 82 years of observations in 2021, and is updated every day. A home-made software (DigiSun) written in Python is used to derive quantities such as location and areas from the sunspot drawings.ivo://ivoa.net/std/epntap#table-2.0granule_uidInternal table row index, which must be unique within the table. Can be alphanumeric.meta.idcharindexedprimarygranule_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.id;obschardataproduct_typeThe 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.meta.code.classcharnullabletarget_nameStandard IAU name of target (from a list related to target class), case sensitivemeta.id;srccharnullabletarget_classType of target, from a controlled vocabulary.src.classcharnullabletime_minAcquisition start time (in JD), as UTC at time_refpositiondtime.start;obsdoublenullabletime_maxAcquisition stop time (in JD), as UTC at time_refpositiondtime.end;obsdoublenullabletime_sampling_step_minSampling time for measurements of dynamical phenomena, lower limit.stime.resolution;stat.mindoublenullabletime_sampling_step_maxSampling time for measurements of dynamical phenomena, upper limitstime.resolution;stat.maxdoublenullabletime_exp_minIntegration time of the measurement, lower limit.stime.duration;obs.exposure;stat.mindoublenullabletime_exp_maxIntegration time of the measurement, upper limitstime.duration;obs.exposure;stat.maxdoublenullablespectral_range_minSpectral range (frequency), lower limit.Hzem.freq;stat.mindoublenullablespectral_range_maxSpectral range (frequency), upper limitHzem.freq;stat.maxdoublenullablespectral_sampling_step_minSpectral sampling step, lower limit.Hzem.freq;spect.binSize;stat.mindoublenullablespectral_sampling_step_maxSpectral sampling step, upper limitHzem.freq;spect.binSize;stat.maxdoublenullablespectral_resolution_minSpectral resolution, lower limit.spect.resolution;stat.mindoublenullablespectral_resolution_maxSpectral resolution, upper limitspect.resolution;stat.maxdoublenullablec1min(This data collection does not give coordinates)doublenullablec1max(This data collection does not give coordinates)doublenullablec2min(This data collection does not give coordinates)doublenullablec2max(This data collection does not give coordinates)doublenullablec3min(This data collection does not give coordinates)doublenullablec3max(This data collection does not give coordinates)doublenullables_regionObsCore-like footprint, valid for celestial, spherical, or body-fixed framespos.outline;obs.fieldcharnullablec1_resol_min(This data collection does not give coordinates)doublenullablec1_resol_max(This data collection does not give coordinates)doublenullablec2_resol_min(This data collection does not give coordinates)doublenullablec2_resol_max(This data collection does not give coordinates)doublenullablec3_resol_min(This data collection does not give coordinates)doublenullablec3_resol_max(This data collection does not give coordinates)doublenullablespatial_frame_typeFlavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined.meta.code.class;pos.framecharnullableincidence_minIncidence angle (solar zenithal angle) during data acquisition, lower limit.degpos.incidenceAng;stat.mindoublenullableincidence_maxIncidence angle (solar zenithal angle) during data acquisition, upper limitdegpos.incidenceAng;stat.maxdoublenullableemergence_minEmergence angle during data acquisition, lower limit.degpos.emergenceAng;stat.mindoublenullableemergence_maxEmergence angle during data acquisition, upper limitdegpos.emergenceAng;stat.maxdoublenullablephase_minPhase angle during data acquisition, lower limit.degpos.phaseAng;stat.mindoublenullablephase_maxPhase angle during data acquisition, upper limitdegpos.phaseAng;stat.maxdoublenullableinstrument_host_nameStandard name of the observatory or spacecraftmeta.id;instr.obstycharnullableinstrument_nameStandard name of instrumentmeta.id;instrcharnullablemeasurement_typeUCD(s) defining the data, with multiple entries separated by hash (#) characters.meta.ucdcharnullableprocessing_levelDataset-related encoding, or simplified CODMAC calibration levelmeta.calibLevelintcreation_dateDate of first entry of this granuletime.creationcharnullablemodification_dateDate of last modification (used to handle mirroring)time.processingcharnullablerelease_dateStart of public access periodtime.releasecharnullableservice_titleTitle of resource (an acronym really, will be used to handle multiservice results)meta.titlecharnullableaccess_urlURL of the data file, case sensitive. If present, then access_format and access_estsize are mandatory.meta.ref.url;meta.filecharnullableaccess_formatFile format type (RFC 6838 Media Type a.k.a. MIME type)meta.code.mimecharnullableaccess_estsizeEstimated file size in kbyte.kbytephys.size;meta.fileintnullableoperatorThe last person that analyzed the drawingmeta.codecharnullablewolf_numberThe Wolf numbermeta.numbercharnullablequalityMeteorological condition of observation: 0 no observation possible, 1 very cloudy, 2, partially cloudy, 3: fair conditions, 4: good conditions, 5: exceptionally good conditions.meta.code.qualcharnullablefeat_hg_latHeliographic latitude of center of grouppos.wcs;pos.barycenterdoublenullablefeat_hg_lonHeliographic longitude of center of grouppos.wcs;pos.barycenterdoublenullablefeat_pixel_xX-image coordinate of center of group in pixelpos.wcs;pos.barycenter;pos.cartesian.xdoublenullablefeat_pixel_yY-image coordinate of center of group in pixelpos.wcs;pos.barycenter;pos.cartesian.ydoublenullableangular_dist_meridAngular distance in longitude from the central meridian in degreemeta.numberdoublenullableangular_dist_centerangular distance from the center in degreemeta.numberdoublenullablequadrantQuadrant of group in solar disc 1=NE, 2:SE, 3=SW, 4=NWmeta.numbercharmcintosh_clsMcIntosh classmeta.code.classcharnullablezurich_clsZurich classmeta.code.classcharnullablenum_spotsnumber of spotsmeta.numberintdipole1_hg_latHeliographic latitude of the first part of the dipoledegpos.wcsdoublenullabledipole1_hg_lonHeliographic longitude of the first part of the dipoledegpos.wcsdoublenullabledipole2_hg_latHeliographic latitude of the second part of the dipoledegpos.wcsdoublenullabledipole2_hg_lonHeliographic longitude of the second part of the dipoledegpos.wcsdoublenullabledipole1_pixel_xX-image coordinate of first part of the dipole in pixelpos.wcsdoublenullabledipole1_pixel_yY-image coordinate of first part of the dipole in pixelpos.wcsdoublenullabledipole2_pixel_xX-image coordinate of second part of the dipole in pixelpos.wcsdoublenullabledipole2_pixel_yY-image coordinate of second part of the dipole in pixelpos.wcsdoublenullablespot_area_deproj_mshGroup deprojected area in millionths of solar hemispherephys.areadoublenullablespot_area_raw_pxGroup area in number of pixelsphys.areadoublenullablespot_area_proj_mshGroup projected area in millionths of solar hemispherephys.areadoublenullablegspotRelative importance of the leading spot and density of the sunspot population (USSPS codes)obs.paramintlargest_spotName of the largest spot (varchar(1)): L (leading), T (trailing), or E (equal)meta.code.classcharnullable