Statistics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83..828d&link_type=abstract
Astronomical Journal, vol. 83, July 1978, p. 828-837.
Statistics
4
Io, Jupiter Atmosphere, Modulation, Planetary Radiation, Radio Emission, Satellite Observation, Atmospheric Radiation, Data Reduction, High Frequencies, Plasma Radiation, Radiant Flux Density, Variance (Statistics), Jupiter, Satellites, Emissions, Atmosphere, Radiation, Rotation, Io, Europa, Morphology, Radiometers, Radioemissions
Scientific paper
RAE-1 data on Jovian decametric emission between 1 and 8 MHz are analyzed to investigate modulation of the emission with respect to the rotation phase of the planet and Io phase as well as a possible variation with flux density of the rotation-phase and Io-phase control below 8 MHz. Attention is given to the observing interval, identification of Jovian emission, orbital-phase constraint, and calculated emission occurrence probabilities. Five frequencies are selected for the analysis (6550, 4700, 3930, 2200, and 1310 kHz), and System III coordinates are used to illustrate the rotation-phase behavior. The spectral distribution of peak flux density is examined along with the overall occurrence probability, the individual modulations, theoretical implications of invariance of active Io phases, and possible modulation by Europa. The results show that Io exerts a suprisingly high degree of control at the low frequencies, that rotation-phase control is only marginal, and that the manner in which Io control is found to vary with flux density is consistent with previous findings at higher frequencies.
Carr Thomas D.
Desch Michael D.
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