Observations of the interplanetary magnetic field between 0.46 and 1 A.U. by the Mariner 10 spacecraft

Details Observations of the interplanetary magnetic field between 0.46 and 1 A.U. by the Mariner 10 spacecraft Observations of the interplanetary magnetic field between 0.46 and 1 A.U. by the Mariner 10 spacecraft

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976phdt.........3b&link_type=abstract

Ph.D. Thesis - Catholic Univ. of Am. National Aeronautics and Space Administration. Goddard Space Flight Center, Greenbelt, MD.

Computer Science

7

Interplanetary Magnetic Fields, Mariner 10 Space Probe, Solar Magnetic Field, Electromagnetic Radiation, Least Squares Method, Power Spectra

Scientific paper

Almost continuous measurement of the interplanetary magnetic field (IMF) at a sampling rate of 25 vectors/sec was performed by the magnetic field experiment onboard the Mariner 10 spacecraft during the period November 3, 1973 to April 14, 1974, comprising approximately 5-2/3 solar rotations and extending in radial distance from the sun from 1 to 0.46 AU. A clearly discernible two-sector pattern of field polarity was observed during the last 3-1/2 months of the period, with the dominant polarity toward the sun below the solar equatorial plane. Two compound high-speed solar wind streams were also present during this period, one in each magnetic field sector. Relative fluctuations of the field in magnitude and direction were found to have large time variations, but on average the relative magnitude fluctuations were approximately constant over the range of heliocentric distance covered while the relative directional fluctuations showed a slight decrease on average with increasing distance. The occurrence rate of directional discontinuities was also found to decrease with increasing radial distance from the sun.

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