The Galileo Plasma Wave Receiver is described by Gurnett et al., 1992 [GURNETTETAL1992] which is provided in the DOCUMENT/PWS/INSTdirectory of the PDS/PPI data archive volumes.
The basic objective of this investigation is the study of plasmawaves and radio emissions in the magnetosphere of Jupiter. TheVoyager 1 and 2 flybys of Jupiter have now clearly shown that manycomplex types of plasma wave and radio-emission phenomena occur in theJovian magnetosphere. These include electromagnetic whistler modeemissions called chorus and hiss, electromagnetic continuum radiationtrapped in the magnetospheric cavity, electrostatic waves associatedwith harmonics of the electron cyclotron frequency, and a wide varietyof escaping radio emissions. Some of these waves, such as the whistlermode emissions, are believed to play an important role in the dynamicsof the magnetosphere by controlling the pitch-angle scattering and lossof energetic charged particles. In other cases plasma waves provide animportant diagnostic tool by revealing various characteristicfrequencies of the plasma, from which quantities such as the electrondensity can be computed.
Since the Galileo spacecraft will be the first orbiter of Jupiter,this spacecraft will provide a much more comprehensive study of theJovian magnetosphere than was possible with the previous Pioneer andVoyager flybys of Jupiter. Specifically, the orbit of Galileo willprovide a survey of the magnetotail at distances of up to 150 RJ over arange of local times near local midnight, a region that has neverpreviously been explored; repeated passes through the plasma sheet, andthe tail lobes; and numerous close flybys of the Galilean satellites.
Of particular importance will be a very close pass by the satellite Io.
The Voyager flybys showed that volcanic gases escaping from this moonare the main source of plasma in the Jovian magnetosphere. The primaryenergization of plasma in the Jovian magnetosphere is believed to occurin a dense plasma torus that surrounds Jupiter near Io's orbit. Thisenergization is associated with many complex plasma wave phenomena,including the generation of intense kilometric and decametric radioemissions.
In addition to exploring regions never previously investigated,Galileo, by virtue of its long lifetime in orbit around Jupiter, alsoprovides a unique new capability for carrying out studies of temporalvariations on time scales that