Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..62...13k&link_type=abstract
Astrophysics and Space Science, vol. 62, no. 1, May 1979, p. 13-21.
Astronomy and Astrophysics
Astrophysics
1
Interplanetary Gas, Magnetic Measurement, Magnetohydrodynamic Stability, Vector Analysis, Error Analysis, Interplanetary Magnetic Fields, Least Squares Method, Magnetohydrodynamic Waves, Shock Waves
Scientific paper
The uncertainty in the determination of the normal to magnetohydrodynamic discontinuities, connected with application of the so-called 'least-squares' method for magnetic field experimental data, is analyzed. A system of possible cases and corresponding necessary conditions is constructed. It is shown that in the general case the determination of the type of the discontinuity and the normal vector is impossible without some further information. The error in the determination of the normal vector is considered and a scheme for its estimation is proposed. Two definite effects of shock waves in the interplanetary plasma are considered as an illustration of the proposed method.
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