Orbit to orbit, dust to dust: A synopsis of Galileo dust data in frequency space

Details Orbit to orbit, dust to dust: A synopsis of Galileo dust data in frequency space Orbit to orbit, dust to dust: A synopsis of Galileo dust data in frequency space

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....12994g&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #12994

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Scientific paper

After time, the next most important representation of a signal is frequency. From frequency analysis, we can learn: 1) about the different media (dispersion) through which the waves travel, and 2) more about the physical phenomena behind the signal. This work initially emerged from the frequency analysis which showed that Io is a source of the Jovian dust streams. Upon closer examination of the dust detector frequencies, orbit-by-orbit, the variabilities become clearer, indicating that, either the intervening medium (plasma + magnetic field), and/or Io itself, i.e. its volcanoes, is a source of the variability. Our synopsis of the orbit-by-orbit frequencies show typical frequencies such as Io's period of rotation, Jupiter's full and half period of rotation, and amplitude modulation between Jupiter and Io's frequencies, however other frequencies appear and disappear as well. We will present these ethereal frequencies, focus on those orbits which show the highest dust impact rates on the Galileo dust detector (orbits: E4, G7, G8, E11, E15, C21, G28), and give an overall view of the Galileo dust streams data in frequency space from 1996-2002. Funding for this work was provided by the Deutsche Forschungsgemeinschaft (DFG).

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