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The field radiation pattern of a short electric antenna is investigated in a large magnetoplasma in the parameter regime omega > omega c , omega p >> omega c ( omega p , omega c are respectively the electron plasma and cyclotron frequencies). Electronic cyclotron harmonic waves are detected all around the transmitting antenna and not only in a direction perpendicular to the magnetic field. The great number of wavelengths observed in this large plasma system leads to very accurate measurements of the electron plasma frequency, the thermal speed and the radial density profile. Application of the method to space plasma is briefly discussed.
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Lembège et al. (1978) studied this question.
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