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Title:
Correction to 'Recirculation of energetic particles in Jupiter's magnetosphere'
Authors:
SENTMAN, D. D.; VAN ALLEN, J. A.; GOERTZ, C. K.
Affiliation:
AC(Iowa, University, Iowa City, Iowa)
Journal:
Geophysical Research Letters, vol. 5, July 1978, p. 621, 622. Navy-supported research;
Publication Date:
07/1978
Category:
Lunar and Planetary Exploration
Origin:
STI
NASA/STI Keywords:
JUPITER ATMOSPHERE, MAGNETOSPHERIC INSTABILITY, PARTICLE MOTION, PLANETARY MAGNETOSPHERES, ANGULAR DISTRIBUTION, ERROR ANALYSIS, PIONEER 11 SPACE PROBE, PITCH (INCLINATION)
Bibliographic Code:
1978GeoRL...5..621S

Abstract

An error in Pioneer 11 data reduction software has, when present, caused a phase shift of 180 deg in the assignment of spacecraft roll angles. The corrected analysis of the pitch angle distributions of energetic particles in Jupiter's magnetosphere reveals significant proton anisotropies directed toward the planet in the southern hemisphere, contrary to the authors' (1975) original report. In the northern hemisphere, both proton and electron anisotropies are directed away from the planet, as reported previously. The revised data show that the claim of direct evidence for the hypothesis of recirculation of energetic particles in the Jovian magnetosphere is invalid. It is suggested that indirect evidence still supports the hypothesis, although the recirculation process must be weaker than originally envisioned and obscured by other processes.

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