Abstract
BETWEEN May 1972 and October 1974, observations were made from the University of Otago's field site at Swampy Summit near Dunedin, of Jupiter's high-frequency radio emissions. The frequency range of 23–25 MHz was reduced to a 2 MHz video signal, recorded on videotape, and analysed with a high resolution spectrum analyser to produce the dynamic spectrum of the millisecond radio bursts. The spectrum analyser was constructed from a modified video tape recorder, using the time expansion principle developed independently by Ellis1. The frequency and time resolution were 10 KHz and 500 µs, respectively, and the spectrum was recorded on 35 mm film at the rate of 20, 40 or 100 ms per half frame.
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References
Ellis, G. R. A., Aust. J. Phys., 26, 253 (1973).
Ellis, G. R. A., Nature, 235, 415 (1975).
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GROTH, M., DOWDEN, R. Spectra of high-frequency radio emission from Jupiter. Nature 255, 382–384 (1975). https://doi.org/10.1038/255382a0
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DOI: https://doi.org/10.1038/255382a0
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