Computer Science – Sound
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985angeo...3..417e&link_type=abstract
Annales Geophysicae (ISSN 0755-0685), vol. 3, July-Aug. 1985, p. 417-420. SERC-supported research.
Computer Science
Sound
2
Cyclotron Radiation, Plasma Waves, Space Plasmas, Terrestrial Radiation, Continuous Spectra, Geos 1 Satellite, Harmonic Radiation, Nonthermal Radiation, Plasma Frequencies, Plasmapause, Remote Sensing
Scientific paper
Several mechanisms have been invoked to explain the origin of the so-called 'electromagnetic nonthermal continuum' radiation, or terrestrial myriametric radiation. All of them hinge on wave-wave coupling or conversion, linear or not. Continuum radiation can under certain assumptions be used as a nonlocal diagnostic of the medium. To validate any of such interpretations requires a reliable identification of the various waves present in the source region and of their mode of propagation. It is shown, by one example of GEOS-1 measurements which has been discussed in the literature, how the use of active relaxation sounder measurements allows one to determine reliably the characteristic frequencies of the medium, in particular the plasma frequency. The results lead to a significantly different interpretation of the event.
Christiansen Peter J.
Etcheto Jacqueline
Gough Michael Paul
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