A New Approach in Designing an Empirical Bow Shock Model

Details A New Approach in Designing an Empirical Bow Shock Model A New Approach in Designing an Empirical Bow Shock Model

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh41a..14m&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH41A-14

Physics

2109 Discontinuities, 2154 Planetary Bow Shocks, 2194 Instruments And Techniques, 2784 Solar Wind/Magnetosphere Interactions, 7851 Shock Waves

Scientific paper

In more than three decades, spacecraft have crossed the terrestrial bow shock tens of thousand times providing enough data to construct bow shock models by fitting various model surfaces to the observations. However, the existing models often employ controversial techniques that are no longer necessary or, at least, their validity should be investigated. In particular, the popular model of Peredo et al. [1995] employed the method of averaging consecutive bow shock crossings into a single data point even when the first and last crossings were separated by hours. Furthermore, they took the upstream properties as 1-hour averages which may improperly parametrize the bow shock for varying solar wind conditions. We will compare the Peredo et al. model with our new bow shock model employing the same functional form but with every single bow shock crossing used independently together with the 5-minute averages of the upstream parameters. We will discuss the new insights gained from our new model employed to the recently completed large IMP-8 database along with HEOS-2 and MAGION-4 observations.

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