Pioneer 10 and 11 (Jupiter and Saturn) magnetic field experiments

Details Pioneer 10 and 11 (Jupiter and Saturn) magnetic field experiments Pioneer 10 and 11 (Jupiter and Saturn) magnetic field experiments

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986byu..rept.....j&link_type=abstract

Final Report Brigham Young Univ., Provo, UT. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astronomy

Jupiter (Planet), Magnetic Storms, Planetary Magnetic Fields, Planetary Magnetospheres, Saturn (Planet), Current Sheets, Magnetometers, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Saturn Rings, Time Dependence

Scientific paper

Magnet field data obtained by the vector helium magnetometer (VHM) during the encounters of Jupiter (Pioneer 10 and 11) and Saturn (Pioneer 11) was analyzed and interpreted. The puzzling characteristics of the Jovian and Saturnian magnetospheric magnetic fields were studied. An apparent substorm (including thinning of the dayside tail current sheet) was observed at Jupiter, as well as evidence suggesting that at the magnetopause the cusp is at an abnormally low latitude. The characteristics of Saturn's ring current as observed by Pioneer 11 were dramatically different from those suggested by the Voyager observations. Most importantly, very strong perturbations in the azimuthal ring current magnetic field suggest that the plane of the ring was not in the dipole equatorial plane, being tilted 5 to 10 deg. relative to the dipole and undergoing significant changes during the encounter. When these changing currents were corrected for, an improved planetary field determination was obtained. In addition, the ring and azimuthal currents at Saturn displayed significantly different time dependences.

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