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Titel Multi-point observations of Co-rotating Interaction Regions
VerfasserIn Nina Dresing, Raúl Gómez-Herrero, Olga Malandraki, Bernd Heber, Emilia Kilpua, Andreas Klassen, Reinhold Müller-Mellin, Robert F. Wimmer-Schweingruber
Konferenz EGU General Assembly 2010
Medientyp Artikel
Sprache Englisch
Digitales Dokument PDF
Erschienen In: GRA - Volume 12 (2010)
Datensatznummer 250039473
 
Zusammenfassung
During the recent solar minimum, Co-rotating Interaction Regions (CIRs) and their associated recurrent ion increases have been regularly observed in the inner heliosphere. The multi-point observations provided by STEREO and near-Earth spacecraft revealed that the structure of the same CIR often show significant variations when observed successively by different spacecraft. These variations become more evident as the co-rotation time between the spacecraft increases. We used time-shifting and backmapping techniques to compare observations of the same CIR by STEREO A and B in order quantify the discrepancies in the plasma and particle measurements carried out by the identical instrumentation onboard both spacecraft. As found previously by Helios, the latitudinal separation between the spacecraft are an important cause of such discrepancies. We focus the study on this spatial effect excluding periods dominated by temporal variations related with coronal hole changes or the presence of transient structures in the solar wind in the vicinity of CIR.