Evidence for a bow shock structure at approximately 400 earth radii Pioneer 7

Details Evidence for a bow shock structure at approximately 400 earth radii Pioneer 7 Evidence for a bow shock structure at approximately 400 earth radii Pioneer 7

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.1441v&link_type=abstract

Journal of Geophysical Research, vol. 81, Mar. 1, 1976, p. 1441-1446.

Physics

2

Bow Waves, Earth Magnetosphere, Geomagnetic Tail, Interplanetary Magnetic Fields, Shock Waves, Earth Planetary Structure, Pioneer 7 Space Probe, Solar Wind

Scientific paper

Analysis of simultaneous magnetic-field and plasma data by Pioneer 7 reveals the existence of a well-defined bow-shock structure at geocentric distances of 350-440 earth radii. Bow-shock physical parameters are computed by an iterative least-squares technique applied to combined plasma and magnetic-field data. Observed features suggest that at those distances from earth, the bow wave still preserves its near-earth characteristics. In particular, the normal to the shock surface is in agreement with the predicted Mach angle of about 20 deg. Deviations from these typical conditions are interpreted in terms of a local distortion of the shock geometry.

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