Abstract
DURING the 1963 apparition of Jupiter, an experiment was carried out relating to the fine structure in the dynamic spectra of Jovian decametric radiation. The equipment used was a sweep-frequency receiver1, operated between 20 and 18 Mc/s with a repetition frequency of 10/sec. The 3 and 20 db. intermediate frequency band-widths were 80 and 150 kc/s, respectively, and the post-detection time constant 0.1 msec. The dynamic spectra were recorded photographically from the intensity-modulated cathode-ray tube display. The aerial installation consisted of four identical three-element Yagi aerials, two of them connected in parallel to the spectrograph and two others, separated by 7.5 wave-lengths, to a phase-switching interferometer on 19.3 Mc/s driving a pen recorder. All the Yagi aerials were directed 30° west of the meridian.
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