| The National Geophysical Data Center holds a published series of observations of Jovian
Dekametric Emission bursts recorded on the University of Colorado’s Boulder radio
spectrograph. Between 1960 and 1976, nearly continuous observations were made with
a sweep frequency interferometer composed of two trihedral corner reflectors, each
with an effective area of about 500 meters square. In 1960, the receiver operated
between 15 and 34 MHz; from 1961 to September 1968, between 7.6 and 41 MHz; from September
1968 to June 1976, between 7.6 and 80 MHz. For each Jupiter apparition the tabulations
include the start time of the emission; the intensity, burstiness and frequency range
of the emission, the start and end values of the longitude of Jupiter’s central meridian;
and the start and end values of the position angle of the planet’s innermost satellite,
IO.
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