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| Titel |
Multi-spacecraft observations of interplanetary shock parameters |
| VerfasserIn |
Andriy Koval, Adam Szabo |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250038113
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| Zusammenfassung |
| We are presenting a study of interplanetary shock parameters (orientation, propagation speed,
Mach number, and θBn, the angle between the shock normal and magnetic field) observed by
multiple spacecraft in the solar wind. These parameters are calculated locally from the
magnetic field and plasma (proton and alpha-particle) measurements of the Wind and ACE
spacecraft by applying the modified Koval and Szabo [2008] technique that uses the
anisotropic Rankine-Hugoniot conservation equations. The calculated local shock
orientations and speeds are consequently used to predict the times of the shock arrival to
the locations of the other spacecraft available in the solar wind assuming shock
planarity and constant speed. We compare the predicted times with those observed
as well as directly compare the Wind and ACE local shock normals and speeds
with each other and with the global shock normal and speed determined from the
four-spacecraft times and locations of the shock passages (when available). The agreement
of the shock’s shape with the planar assumption is discussed based on the shock
Mach number, θBn angle, and the shock driver. We also discuss the discrepancy of
the other shock local parameters as a function of the inter-spacecraft separation. |
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