JOVIAN SYSTEM DATA ANALYSIS PROGRAM PROPOSAL SUMMARY
ROSS-98 NRA 98-OSS-05
Jun 17, 1998
We plan to exploit the extensive real time survey (RTS) field and
particle data from Galileo supplemented by observations from previous
Jupiter missions to study several key problems pertaining to the
structure and dynamics of Jupiter's magnetosphere.
In order to establish the relative roles of solar wind and the
internal plasma processes in shaping the structure and dynamics of
Jupiter's magnetosphere, we will establish a database of averaged
field in the lobe regions and perform multivariate analysis on it to
study local time effects in the field strength and orientation in the
We will develop a quantitative model of the structure of Jupiter's
current sheet to understand the relative influences of centrifugal
force and the solar wind dynamic forcing in containing the plasma
near the equatorial plane. Improved models of Jupiter's current sheet
are also required for constructing the empirical models of the
By using new and existing techniques, we will compute and establish a
database of electric current density in Jupiter's magnetosphere. The
database will then be used in quantitative studies outlined below.
By computing Lorentz force from the calculated current density and
observed magnetic field, we will perform studies of stress balance in
Jupiter's magnetosphere to understand the relative importance of cold
and hot plasma in generating currents in Jupiter's magnetosphere.
We will use the new database of radial current density to understand
how the angular momentum is transferred outwards in Jupiter's
Data from the middle and outer magnetosphere in G2 and G8 orbits
clearly show semi-periodic reconfigurations of Jupiter's
magnetosphere. We will analyze field, particle and plasma wave
spectrometer data to ask if these events constitute magnetic
substorms. We will perform stress balance studies to understand why
the magnetosphere undergoes reconfigurations during certain periods.
The new data products resulting from these studies will be made
available to the community though a home page on the internet.