Saturn
Radio Emissions
Cassini is a joint U.S.-European mission to Saturn and its moon
Titan. It was launched October 15, 1997. One of the major scientific
instruments aboard is RPWS. RPWS is gathering data for Radio and Plasma
Wave Science investigations.
(Colors in this photo of Saturn are very close to the colors
that would be seen by a humun observer viewing Saturn from the same distance.)
Sounds of 50 to 500 kHz radio emissions RPWS has sent back
to earth from Saturn have been compressed in time in this recording so
that one second corresponds to one planet rotation.
(Audio stream courtesy of NASA, JPL and The University of Iowa)
Radio
Storms on Jupiter
Jupiter is a powerful source of odd 25 MHz radio noises that can
be received from Earth. The signals have a couple different forms called
L Bursts and S Bursts.
(This image of Jupiter is a true-color mosaic of
Jupiter made from 27 red, green and blue image-fields that were components
of nine color photographs taken on December 29, 2000, by a narrow-angle
camera onboard the Cassini spacecraft. The Cassini camera recorded more
colors than a human eye can see. However, the colors in this mosaic are
rendered to appear almost exactly as they would appear to a human the
same distance from Jupiter.)
Jupiter L Bursts sound a little like waves crashing on a beach.
(Audio stream courtesy of NASA)
Jupiter S Bursts have this rapid-fire popping sound.
(Audio stream courtesy of NASA)
However, if S Bursts are recorded and played back with a 128:1 slowdown
ratio the result is these eerie whistling noises.
(Audio stream courtesy of NASA)
Earth's Magnetosphere also
Produces
Interesting Radio Waves Called Chorus
This is an example of the Earth's magnetosphere Chorus
recorded by Stephen P. McGreevy during a severe magnetic storm over Vancouver
Island, British Columbia, Canada, on February 21, 1994.
(Audio stream courtesy of NASA)
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