Single spacecraft identification of the bow shock orientation and speed: A comparison between different methods

Lepidi, S. and Villante, U. and Lazarus, A. J. (1997) Single spacecraft identification of the bow shock orientation and speed: A comparison between different methods. Il nuovo cimento C, 20 C (6). pp. 911-922. ISSN 1826-9885

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We examine 33 bow shock crossings by IMP8 and compare different methods to calculate the bow shock normal direction and speed using single spacecraft measurements. We find that the mixed equation by Abraham-Shrauner combined with the mass flux conservation equation and the minimum-variance technique applied to a limited set of the Rankine-Hugoniot conservation equations give very similar results that are in good agreement with theoretical predictions. The solutions obtained by the velocity coplanarity theorem are reliable only for nearly perpendicular shocks, while poor results are obtained for such cases from the magnetic coplanarity theorem. We also suggest that in some cases the time resolution of plasma measurements (about 60 s) may be too low to resolve the density behaviour close to the bow shock and to allow definite evaluation of the shock parameters.

Item Type: Article
Additional Information: Paper presented at the VII Cosmic Physics National Conference, Rimini, October 26-28, 1994.
Uncontrolled Keywords: Physics of the magnetosphere; cosmic rays; conference proceedings
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5276 Radiazioni cosmiche (Include il rumore cosmico) (Classificare qui i raggi cosmici)
Depositing User: Marina Spanti
Date Deposited: 09 Feb 2018 10:36
Last Modified: 09 Feb 2018 10:36

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