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Magnetoplasma sheath waves on a conducting tether in the ionosphere with applications to EMI propagation on large space structuresA recent space experiment confirmed sheath-wave propagation of a kilometer-long insulated wire in the ionosphere, oriented parallel to the Earth's magnetic field. This space tether experiment, Oedipus-A, showed a sheath-wave passband up to about 2 MHz and a phase velocity somewhat slower than the velocity of light in a vacuum, and also demonstrated both ease of wave excitation and low attenuation. The evidence suggests that, on any large structure in low Earth orbit, transient or continuous wave electromagnetic interference, once generated, could propagate over the structure via sheath waves, producing unwanted signal levels much higher than in the absence of the ambient plasma medium. Consequently, there is a need for a review of both electromagnetic interference/electromagnetic compatibility standards and ground test procedures as they apply to large structures in low Earth orbit.
Document ID
19910011410
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Balmain, K. G. (Toronto Univ. (Ontario). Ottawa, Ontario , Canada)
James, H. G. (Communications Research Centre)
Bantin, C. C. (Toronto Univ. Ontario)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Publication Information
Publication: NASA, Lyndon B. Johnson Space Center, Fourth Annual Workshop on Space Operations Applications and Research (SOAR 90)
Subject Category
Communications And Radar
Accession Number
91N20723
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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