The magnetospheric phenomenon of non-thermal radio emission is known since the serendipitous discovery of Jupiter as radio planet in 1955, opening the new field of " Planetary Radio Astronomy". Planetary radio astronomy: Earth, giant planets, and beyond Also included are two updates, one each from Spain and Australia on current host country activities.
#Terragen render bill reid update#
A brief update on the OSS-sponsored planetary radio astronomy experiment is provided.
The activities of the Deep Space Network in support of radio and radar astronomy operations during July and August 1980 are reported. Calculation of the spatial distribution and intensity of the Io-generated magnetospheric currents are also presented these currents may be limited principally by wave impedance and local field strengths. It remains unknown why certain radii might be favored, unless radial electric field components or other means serve to differentiate radially the magnetospheric plasma density, particle energy vectors, or particle coherence. Since other evidence strongly suggests that most or all of this radio emission is occurring near the local magnetospheric electron cyclotron frequency, this implies that this emission preferentially occurs at certain continually changing planetary radii. The Neptunian spectral features appear to drift little or not at all, their evolution consisting principally of waxing and waning. To the extent these features drift in frequency, they appear never to cross one another. In every case multiple spectral features evolve on time scales of seconds to minutes. The most important conclusion to be drawn from these observations is that banded spectral emission is common to the radio emission below 1-2 MHz observed from all four Jovian planets. Unpublished results for Uranus, Neptune, and theoretical Ionian current distributions are presented at greater length. Of those results which were documented or published, this final report surveys only the highlights and cites references for more complete discussions. This PRA data provided unique insights into the radio emission characteristics of the outer planets because of PRA's unique spectral response below the terrestrial ionospheric plasma frequency and its unprecedented proximity to the source. Eikenberry, Stephen S.Īnalysis of nonthermal radio emission data obtained by the Planetary Radio Astronomy (PRA) spectrometers on the Voyager 1 and 2 spacecraft was performed.
Voyager planetary radio astronomy studies
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