| Summary: | The Heliospheric Cataloguing, Analysis and Techniques Service (HELCATS) project is one of the European\nUnion’s Seventh Framework Programme (EU FP7) projects. The project is primarily targeted to the cataloguing of\ntransient and background structures observed in the heliosphere by the visible-light Heliospheric Imagers (HIs) on\nboard the twin spacecraft STEREO mission, including identification of their source regions and in-situ signatures.\nThe current version of the HELCATS manually-generated Coronal Mass Ejection (CME) Catalogue contains more\nthan 1,000 CMEs observed between 2007 and 2016, and the current HELCATS Stream Interaction Region (SIR)\nCatalogue contains signatures of nearly 200 co-rotating density structures in the ecliptic plane. HELCATS also\nincludes an assessment of the complementary nature of ground-based radio observations of interplanetary scintillation\n(IPS), which is yielding catalogues of IPS features (from EISCAT/MERLIN/ESR and/or LOFAR data,\nwhere available) that are being compared to the STEREO HI catalogues. Here we discuss the near-final status of\nthis aspects of HELCATS and provide any insights that have been gleaned from initial analyses of this joint cataloguing\nexercise. Such insights relate, in particular, to the space-weather exploitation of these two complementary\nobservational techniques. For example, there are cases where a CME is imaged by the STEREO HI instruments\nbut then not detected using IPS, and vice versa, and preliminary investigations of these will be discussed.
|
|---|