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Reliability of prediction of the magnetosheath Bz component from interplanetary magnetic field observations

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    SYSNO ASEP0338070
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleReliability of prediction of the magnetosheath Bz component from interplanetary magnetic field observations
    Author(s) Šafránková, J. (CZ)
    Hayosh, Mykhaylo (UFA-U) RID, ORCID
    Gutynska, O. (CZ)
    Němeček, Z. (CZ)
    Přech, L. (CZ)
    Source TitleJournal of Geophysical Research - ISSN 0148-0227
    Roč. 114, - (2009), A12213/1-A12213/7
    Number of pages7 s.
    Languageeng - English
    CountryUS - United States
    KeywordsIMF ; magnetosheath
    Subject RIVBL - Plasma and Gas Discharge Physics
    R&D ProjectsGA205/09/0170 GA ČR - Czech Science Foundation (CSF)
    CEZAV0Z30420517 - UFA-U, BC-A (2005-2011)
    UT WOS000272946900003
    DOI10.1029/2009JA014552
    AnnotationIn the present statistical study, we discuss a probability of simultaneous observations of the same sign of the magnetic field BZ component in the solar wind and magnetosheath. The analysis is based on 5 min data from four spacecraft (Interball-1, IMP 8, Cluster, and THEMIS) operating in different phases of the solar cycle in themagnetosheath. Their measurements are compared with Wind interplanetary magnetic field (IMF) observations, and other available upstream monitors (ACE, THEMIS B, and OMNI database) are tested for some sets. We can conclude that the probability of observations of the same BZ sign in the solar wind and in the magnetosheath is surprisingly very low from a general point of view. The probability changes through the solar cycle, being larger at the solar minimum. Regardless of the solar cycle phase, this probability is close to 0.5 (random coincidence) for IMF |BZ|<1 nT, and it is a rising function of the BZ value.
    WorkplaceInstitute of Atmospheric Physics
    ContactKateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
    Year of Publishing2010
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