The equilibrium dayside magnetosphere

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Journal of Geophysical Research; (USA)

DOI:https://doi.org/10.1029/JA094iA08p10039· OSTI ID:5469633

Zavriyev, A ^[1]; Hasegawa, A ^[2]

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1. Department of Applied Physics and Nuclear Engineering, Columbia University, New York (US)
2. AT T Bell Laboratories, Murray Hill, New Jersey

We present a method of computing the dayside global Earth magnetic field which is in equilibrium with the plasma pressure basedon satellite observations at a local region of the magnetosphere. The method, which utilizes a perturbation around a dipole magnetic field, involves computation of the global plasma pressure profile, {ital P}{sub {perpendicular}} ({ital r},{theta}) and {ital P}{sub {parallel}}({ital r},{theta}) based on the equatorial (anisotropic) pressure data {ital P}{sub {perpendicular}}({ital r},{pi}/2) and {ital P}{sub {parallel}}({ital r},{pi}/2), derivation of the current profile which satisfies the equilibrium condition, {bold J}{times}{bold B}{minus}{del}{center dot}P=0, and computation of the magnetic field using the current profile and the boundary current produced by the solar wind. The method is applied for the Active Magnetospheric Particle Tracer Explorers data, and the result of the computation is found to compare reasonably well with the observed magnetic field profile near the geomagnetic equator. {copyright} American Geophysical Union 1989

• OSTI ID: 5469633
• Journal Information: Journal of Geophysical Research; (USA), Journal Name: Journal of Geophysical Research; (USA) Vol. 94:A8; ISSN JGREA; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
CURRENT DENSITY
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
EQUILIBRIUM
EXPLORER SATELLITES
PLASMA RINGS
SATELLITES
SOLAR ACTIVITY
SOLAR WIND