2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Catalog/STEREO/SECCHI/HI-1/CACTus/CMEmap SMWG Catalog Real time catalogue of CME detected by CACTus in the STEREO-A/Heliospheric Imager-1 data (beta release, Aug 2016 - Mar 2021) 2026-02-02T13:10:26Z 2025-02-01T12:00:00 Only known prior ReleaseDate of the metadata 2026-02-02T13:10:26Z Added MetadataRightsList. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB An automatic compiled coronal mass ejection (CME) catalogue based on observations from the Heliospheric Imagers (HIs) onboard NASA's Solar Terrestrial Relations Observatory (STEREO) spacecraft. Using the Computer Aided CME Tracking software(CACTus), CMEs are identified in HI data using an automatic feature-detection algorithm. The crux of the software is the detection of CMEs as bright ridges in (time, height) maps using the Hough transform. The next step employs clustering and morphological closing operations to mark out different CMEs. The output is a list of events, similar to the classic catalogs, with starting time, principle angle, angular width and velocity estimation for each CME. In contrast to catalogs assembled by human operators, these CME detections can be done without any human interference on real-time data 24 h per day (see http://sidc.oma.be/cactus for the real-time output with data covering the last 4 days). Therefore the detection is not only more immediate, but, more importantly, also more objective. Experimental results on real-time data show that the developed technique can achieve excellent results in measuring starting time and principal angle and good results for the angular width and velocity measurement compared to the CMEs listed in the catalog. Its overall success rate is presently about 94%. Pant, V.; Willems, S. ; Rodriguez, L. ; Mierla, M. ; Banerjee, D. ; Davies, J. A. 2016-10-06T15:09:39 The Astrophysical Journal https://ui.adsabs.harvard.edu/abs/2016ApJ...833...80P/abstract spase://SMWG/Person/Luciano.Rodriguez Author spase://SMWG/Person/Olga.Y.Uritskaya MetadataContact https://www.sidc.be/cactus/scan/index.html CACTus was designed to detect CMEs according to their observational definition as "a new, discrete, bright white-light feature in the coronagraphic field-of-view, moving radially outward". Utilizing this definition implies that we have not assumed any physical model while characterizing and detecting CMEs. CACTus detects many more events than are listed in the classical, manually compiled catalogs. While browsing the catalog, you will find many small events that do not correspond to the current classical CME picture. They occur independently, prior to or in the aftermath of a large eruption. In the latter case they are not usually included in the classical catalogs, since they are considered part of the whole eruption. spase://SMWG/Repository/SIDC https://www.sidc.be/cactus/hi/beta_nrt/ Text spase://NASA/Instrument/STEREO-A/SECCHI/HI-1 CoronalMassEjection 2016-08-31T01:29:00 2021-03-24T06:48:00 CME CME number Other t0 first apparition in field of view Temporal pa principal angle, counterclockwise from North (degrees) Orientation da angular width (degrees) Positional NPA Northernmost propagation angle (degrees), Positional SuPa Southernmost propagation angle (degrees) Positional v median (projected) velocity (km/s) Velocity dV variation (1 sigma) of velocity over the width of the CME Velocity mindV lowest velocity detected within the CME Velocity MaxV highest velocity detected within the CME Velocity