Accession Number : AD0745789

Title :   Electric Field and Plasma Observations in the Magnetosphere.

Descriptive Note : Progress rept.,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Gurnett,Donald A.

Report Date : MAY 1972

Pagination or Media Count : 42

Abstract : Satellite-borne electric field measurements using the double probe technique have now provided a comprehensive survey of convection electric fields at low altitudes in the magnetosphere. The most prominent features of the convection electric fields are reversals located at high magnetic latitudes, with generally anti-sunward convection poleward and sunward convection equatorward of the electric field reversal location. The electric field reversal is usually coincident with the 'trapping boundary' for electrons with energies E > 45 keV and is interpreted as the boundary between open and closed magnetic field lines. On the day side of the magnetosphere the electric field reversal is observed to coincide with the equatorward boundary of the polar cusp. (Author)

Descriptors :   (*MAGNETOSPHERE, ELECTRIC FIELDS), OSCILLATION, PLASMAS(PHYSICS), CHARGED PARTICLES, AURORAE, POLAR REGIONS, MAGNETIC STORMS

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE