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Title:
The magnetic field of Jupiter - A generalized inverse approach
Authors:
CONNERNEY, J. E. P.
Affiliation:
AA(NASA, Goddard Space Flight Center, Laboratory for Extraterrestrial Physics, Greenbelt, MD)
Journal:
Journal of Geophysical Research, vol. 86, Sept. 1, 1981, p. 7679-7693.
Publication Date:
09/1981
Category:
Lunar and Planetary Exploration; Jupiter
Origin:
STI; LPI [AN-810929%J]
NASA/STI Keywords:
JUPITER (PLANET), PLANETARY MAGNETIC FIELDS, PLANETARY MAGNETOSPHERES, PLANETOLOGY, ASTRONOMICAL MODELS, FLYBY MISSIONS, MAGNETIC FIELD CONFIGURATIONS, PIONEER 10 SPACE PROBE, PIONEER 11 SPACE PROBE, SPACEBORNE ASTRONOMY, VOYAGER PROJECT
LPI Keywords:
JUPITER, MAGNETIC FIELDS, CHARGED PARTICLES, TRAJECTORIES, MAPS, SURFACE, TECHNIQUES, MODELS, OBSERVATIONS, PARAMETERS, ORIGIN, PROCEDURE, DATA, ANALYSIS, THEORETICAL STUDIES, PIONEER 11, COMPARISONS, MAGNETOMETERS, INTENSITY, MAGNITUDE, SPHERICAL HARMONICS, CURRENTS, MAGNETOSPHERE
Bibliographic Code:
1981JGR....86.7679C

Abstract

The estimation of planetary magnetic fields from observations of the magnetic field gathered along a spacecraft flyby trajectory is examined with the aid of generalized inverse techniques, with application to the internal magnetic field of Jupiter. Model non-uniqueness resulting from the limited spatial extent of the observations and noise on the data is explored and quantitative estimates of the model parameter resolution are found. The presence of a substantial magnetic field of external origin due to the currents flowing in the Jovian magnetodisc is found to be an important source of error in estimates of the internal Jovian field, and new models explicitly incorporating these currents are proposed. New internal field models are derived using the vector helium magnetometer observations and the high field fluxgate observations of Pioneer 11, and knowledge of the external current system gained from the Pioneer 10 and Voyagers 1 and 2 encounters.

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