Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..51..363r&link_type=abstract
Astrophysics and Space Science, vol. 51, no. 2, Oct. 1977, p. 363-383. Research supported by the Finnish Academy.
Astronomy and Astrophysics
Astrophysics
23
Decametric Waves, Jupiter (Planet), Planetary Radiation, Radio Bursts, Radio Spectra, Bandwidth, Drift Rate, Elliptical Polarization, Fine Structure, High Resolution, Io, Radio Receivers, Synoptic Measurement
Scientific paper
Dynamic spectra of Jupiter's S-bursts are observed with sweep-frequency and multichannel receivers operating in the frequency ranges 21-30 and 20.85-23.20 MHz, respectively. Spectra obtained with time resolutions of 0.2, 0.02, and 0.004 s are compared, the frequency resolution being 50 kHz. The most normal appearance of S-bursts is in trains with a frequency range of the order of 1 MHz. Narrow-band S-trains also occur. Narrow-band L-emissions in region B are often associated with S-bursts, obviously in the manner described by Flagg et al. (1976). Synoptic spectral observations indicate that region B for S-bursts exhibits a drift in longitude similar to that for L-bursts. The Io phase profile for S-bursts has a maximum in the vicinity of 80 deg in region B and 230 deg in region C. S-bursts observed in 1976 have higher drift rates than those compiled by Krausche et al. (1976). Region-C bursts have simpler spectra and lower drift rates than region-B bursts.
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