Physics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ssi.....4...45m&link_type=abstract
Space Science Instrumentation, vol. 4, Aug. 1978, p. 45-55. Bundesministerium für Forschung und Technologie
Physics
4
Earth Magnetosphere, Electromagnetic Measurement, Electron Beams, Geos Satellites (Esa), Magnetic Probes, Satellite-Borne Instruments, Drift Rate, Electromagnetic Interactions, Electron Guns, Instrument Orientation, Plasma-Particle Interactions, Satellite Orbits, Sensitivity, Signal To Noise Ratios
Scientific paper
In order to measure the electric field and the gradient of the magnetic field, both perpendicular to the local magnetic field, an entirely new instrument was flown aboard the GEOS geostationary satellite of the European Space Agency. This instrument is described in this paper, together with a presentation of the initial scientific results. Electrons are emitted perpendicular to the local magnetic field and are detected after one gyrocircle. Owing to the electric field and the magnetic-field gradient there is a detectable displacement of the returning beam. In the magnetosphere close to the geostationary orbit, the sensitivity of the instrument appears to be 100 microvolts per meter. Such fields may be defined with accuracies of a few percent if the magnetic field is known with sufficient accuracy and if the magnetosphere is sufficiently quiet.
Antrack D.
Melzner F.
Metzner Gerhard
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