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Electric fields in the magnetosphere - the evidence from ISEE, GEOS, and Viking
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- Fälthammar, Carl-Gunne (author)
- KTH,Alfvénlaboratoriet,Rymd- och plasmafysik
- (creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 1989
- 1989
- English.
- In: IEEE Transactions on Plasma Science. - : Institute of Electrical and Electronics Engineers (IEEE). - 0093-3813. ; v, s. 174-185
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Electric field measurements on the satellites GEOS-1, GEOS-2, ISEE-1, and Viking have extended the empirical knowledge of electric fields in space to include the outer regions of the magnetosphere. While the measurements confirm some of the theoretically expected properties of the electric fields, they also reveal unexpected features and a high degree of complexity and variability. The existence of a magnetospheric dawn-to-dusk electric field, as expected on the basis of extrapolation from low-altitude measurements, is confirmed in an average sense. However, the actual field exhibits large spatial and temporal variations, including strong fields of inductive origin. At the magnetopause, the average (dawn-to-dusk directed) tangential electric field component is typically obscured by irregular fluctuations of larger amplitude. In addition, data from electric-field measurements provide further support for the conclusion that a nonvanishing magnetic-field aligned electric field exists in the auroral acceleration region.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- Electric Fields; Magnetic Fields; Satellites
- GEOS Satellites; Viking Satellite
- Earth Atmosphere
Publication and Content Type
- ref (subject category)
- art (subject category)
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