Physics
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.3459m&link_type=abstract
Journal of Geophysical Research, vol. 81, July 1, 1976, p. 3459-3461.
Physics
Field Theory (Physics), Lines Of Force, Magnetic Field Configurations, Magnetic Measurement, Magnetopause, Electron Energy, Interplanetary Magnetic Fields, Isis Satellites, Latitude
Scientific paper
A comparison is given of the latitude of the last closed field line and its dependence on various parameters, as determined from the Mead-Fairfield model and from particle measurements on the Isis 2 satellite. The analysis involves the determination of the latitude at which, on the average, electron energies are a minimum and the identification of this latitude with the average position of the high-latitude limit of closed field lines. At local noon, the closed-field-line limit as given by the model is in good agreement with the measurements except for large negative values of the tilt angle of the earth's axis, and here the measured tilt angle dependence is smaller than is predicted by the model. However, the measurements show a significant dependence of the latitude of the last closed field line on local time, which the model does not allow for.
Budzinski E. E.
Burrows J. R.
McDiarmid I. B.
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