Current measurements in space plasmas and the problem of separating between spatial and temporal variations in the field of a plane electromagnetic wave
Autor: | A.E. Reznikov, L. J. C. Woolliscroft, A. Yu. Schyokotov, Stanislav Klimov, Vladimir Krasnoselskikh, A. E. Kruglyi, A.M. Natanzon |
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Rok vydání: | 1991 |
Předmět: |
Physics
Atmospheric Science Field (physics) business.industry Plane (geometry) Plane wave Aerospace Engineering Astronomy and Astrophysics Plasma Electromagnetic radiation Computational physics symbols.namesake Geophysics Optics Space and Planetary Science Electromagnetic coil symbols General Earth and Planetary Sciences business Current density Doppler effect |
Zdroj: | Advances in Space Research. 11:37-40 |
ISSN: | 0273-1177 |
DOI: | 10.1016/0273-1177(91)90007-7 |
Popis: | A description of an instrument for measuring a current density vector is presented. This instrument uses 3 orthogonal Rogovskii coils. The need for such and instrument is discussed. Together with magnetic measurements it is possible to determine the wave vector of a plane electromagnetic wave using the formula B × CurlB = kB2 = B × [j + ∂E∂t] using direct on-board processing and assuming that ∂E∂t can be neglected in this frequency range. The real frequency of the wave can be calculated using Doppler's law ω = Ω + kυ, where υ is the vehicle velocity and Ω the measured frequency. Test results for prototype coil are presented, together with a discussion of further developments. |
Databáze: | OpenAIRE |
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