sidc_ssg.epn_corivo://ksb-orb.dc/sidc_ssg/q/epn_coreSIDC: Solar Influences Data analysis CenterPLACEHOLDER_CREATOR2026-09-01T11:49:00ZPLACEHOLDER_CONTACT

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

sidc-support@oma.bethe-sunsolar-atmospheresolar-physicssolar-system-astronomySIDC sunspot grouphttps://vo-tap.oma.be/tableinfo/sidc_ssg.epn_coreGeneralUniversityResearchIsServedByROB Virtual Observatory Data Center TAP servicesidc_ssg *** SIDC Sunspot Group *** This service provides a catalog of Sunspot Groups as evaluated by the SIDC forecaster on duty.sidc_ssg.epn_coreSIDC sunspot groupgranule_gidUnique identifier for the sunspot group (SIDC SSG number)meta.idchargranule_uidUnique identifier for the individual (daily) evaluation of the SIDC SSGmeta.idcharindexedprimaryssg_evaluationtime(jd) Evaluation time of the Sunspot Group by the SIDC forecaster. This can be used as time_max (if needed) or as time_min if there is no detection time.dtimedoublessg_locationevaluationtime(jd) Timestamp when the Stonyhurst approximate coordinates of the centre are obtained (either from the NOAA/UKMO evaluation or using HMI images at the specified time).dtime.startdoublenullablessg_longitude_stonyhurstLongitude of the approximate centre of the Sunspot Group using Stonyhurst coordinates.degpos.bodyrc.londoublenullablessg_latitude_stonyhurstLatitude of approximate centre of the Sunspot Group using Stonyhurst coordinates.degpos.bodyrc.latdoublenullablessg_mcintoshMcIntosh classification of the SIDC Sunspot Groupmeta.code.classcharnullablessg_mtwilsonMtWilson classification of the SIDC Sunspot Groupmeta.code.classcharnullablessg_zurichZurich classification of the SIDC Sunspot Groupmeta.code.classcharnullablessg_areaArea of the SIDC Sunspot Group.MSHphys.areadoublenullablessg_numberofspotsNumber of sunspots for this SIDC Sunspot Group.meta.numberintnullablessg_growthAssign Growing, Decreasing, Stable to the SIDC Sunspot Group, based on the area change from the last evaluation. If the area increases/decreases by at least 15%, the group is considered to be Growing/Decreasing, otherwise it's Stable.phys.area;stat.valuecharnullablessg_leadingAssign Leading, Trailing, Equal or Unipolar/Not evaluated to the largest sunspot of the SIDC Sunspot Group (which is not necessarily the westernmost/leading sunspot of the group.meta.code.classcharssg_hasdecayedTrue if the sunspot group has decayed (either disappeared from the visible disk or did not reappear after a rotation). This does not apply to sunspots rotating behind the west limb.meta.code.class;phys.areabooleanssg_operatoridID of the operator/forecaster on duty (internally only)meta.idcharnullablessg_providerProvider (always SIDC)meta.codecharnullable