ROB SPoCA coronal hole datalink serviceivo://ksb-orb.dc/rob_spoca_ch/q/dlSIDC: Solar Influences Data analysis CenterBenjamin Mampaey2026-04-09T09:04:36ZVeronique DelouilleRoyal Observatory of Belgium, Avenue circulaire 3, 1180 Bruxelles,
BELGIQUEsidc-support@oma.bethe-sunsolar-atmospheresolar-physicssolar-system-astronomy *** SPoCA Coronal Hole *** This service provides a catalog of Coronal
Holes obtained with the Spatial Possibilitistic Clustering Algorithm
(SPoCA). Level 2 AIA 19.3nm images (calibrated and corrected for
degradation) are used, at a cadence of one AIA image every 6 hours.
Only coronal holes older than three days are being reported. Bounding
box and characteristics such as areas and pixel intensity statistics,
on AIA 19.3nm and HMI magnetogram images are provided.https://vo-tap.oma.be/rob_spoca_ch/q/dl/infoGeneralUniversityResearchThis research has been made at the Royal Observatory of Belgium