Physics – Space Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh51b..10v&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SH51B-10
Physics
Space Physics
2139 Interplanetary Shocks, 2154 Planetary Bow Shocks, 7851 Shock Waves
Scientific paper
We have developed an analysis/visualization tool to study shocks and other discontinuities from satellite observations of plasma and magnetic field data. The tool uses an extension of the Viñas-Scudder analysis method based on the Rankine-Hugoniot conservation equations and published in JGR (1985). SDAT provides shock parameters such as the normal components n, shock speed Us, angle between the normal and the upstream magnetic field ΘBn, Alfvén and magnetosonic Mach numbers, deHoffman-Teller velocity and many other important shock parameters to describe the shock . SDAT was developed fully in IDL. As currently configured, SDAT reads ASCII data from any space mission for the analysis. All data displays and graphics generated by SDAT are written in Postcript and a summary of the analysis is generated as an ASCII file. The input plasma (ρ, V, Tp and Te) and magnetic field (B) data is read from different files at their own native resolution. The tool allows for data zooming in time and the input data can be in any coordinate system. Examples of real satellite data are included to facilitate the learning process in the usage of the tool. This tool is available to the space physics community. As configured, the tool is basically complete for shock analysis; however, work continues to generalize SDAT for the analysis of other types of discontinuities.
Holland Mark P.
Viñas Adolfo F.
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