Physics
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43..399b&link_type=abstract
Icarus, vol. 43, Sept. 1980, p. 399-407. Research supported by the Centre National d'Etudes Spatiales and Institut National d'As
Physics
63
Antenna Arrays, Antenna Design, Decametric Waves, Jupiter (Planet), Planetary Radiation, Steerable Antennas, Amplification, Data Acquisition, Helical Antennas, Polarized Radiation, Radio Bursts, Radio Receivers, Radio Spectra, Solar Radiation, Jupiter, Decameter Waves, Emissions, Earth-Based Observations, Equipment, Designs, Photographs, Spectra, Scintillations, Bursts, Polarization
Scientific paper
An antenna array has been developed for the study of Jovian emissions in the decametric range with wide bandwidth, high time and frequency resolution, high sensitivity and long tracking time. The array consists of 144 conical helices wound in one of two opposite directions to detect opposite senses of circular polarization, and has a maximum gain of 25 db. The array is fully steerable within the main lobe of the helices and has an effective bandwidth on the order of two octaves. It can be connected to several different time and spectral resolutions. The apparatus has been used to monitor the characteristics of Jovian decametric emission since 1978, in studies such as a survey of Jovian emission in from 20 to 40 MHz, the acquisition of high-resolution spectra, and observations of interplanetary scintillations, S-bursts, and polarization characteristics. Although the Voyager mission has greatly extended knowledge of Jovian emissions, it is expected that ground facilities will continue to play an important role in the study of the physics of Jovian emission.
Aubier M. G.
Boischot Andre
Daigne Gerard
de La Noë Jérôme
Genova Francoise
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