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  1. No Access

    Article

    Near Earth Current Meander (Necm) Model of Substorms

    We propose that the appropriate instability to trigger a substorm is a tailward meander (in the equatorial plane) of the strong current filament that develops during the growth phase. From this single assumpti...

    W.J. Heikkila, T. Chen, Z.X. Liu, Z.Y. Pu, R.J. Pellinen… in Space Science Reviews (2001)

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    Article

    Magnetic reconnection, merging, and viscous interaction in the magnetosphere

    Two ideas were advanced for the process of solar wind-magnetospheric interaction in the same year 1961. Dungey suggested that the interplanetary magnetic field (IMF), although weak, might determine the nature ...

    W. J. Heikkila in Space Science Reviews (1990)

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    Article

    Critique of fluid theory of magnetospheric phenomena

    It is pointed out that the fluid theory has been successful in magnetospheric problems (such as the shape of the magnetopause) which involve basic considerations such as the conservation of particles, of momen...

    W. J. Heikkila in Astrophysics and Space Science (1973)

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    Chapter and Conference Paper

    Photoelectrons Emitted from ISIS Spacecraft

    The ISIS-1 and ISIS-2 satelites carried Soft Particle Spectrometers furnished by the University of Texas at Dallas. Observations of low energy electron fluxes are presented in which photoelectrons emitted from...

    G. L. Wrenn, W. J. Heikkila in Photon and Particle Interactions with Surfaces in Space (1973)