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Control of Jupiter's radio emission and aurorae by the solar wind
Gurnett, D. A.; Persoon, A. M.; Dougherty, M. K. +14 more
Radio emissions from Jupiter provided the first evidence that this giant planet has a strong magnetic field and a large magnetosphere. Jupiter also has polar aurorae, which are similar in many respects to Earth's aurorae. The radio emissions are believed to be generated along the high-latitude magnetic field lines by the same electrons that produc…
The Cassini/Huygens Mission to the Saturnian System
Lebreton, Jean-Pierre; Matson, Dennis L.; Spilker, Linda J.
The international Cassini/Huygens mission consists of the Cassini Saturn Orbiter spacecraft and the Huygens Titan Probe that is targeted for entry into the atmosphere of Saturn's largest moon, Titan. From launch on October 15, 1997 to arrival at Saturn in July 2004, Cassini/Huygens will travel over three billion kilometers. Once in orbit about Sat…
Ultra-relativistic electrons in Jupiter's radiation belts
Johnson, W. T. K.; Klein, M.; Hofstadter, M. +18 more
Ground-based observations have shown that Jupiter is a two-component source of microwave radio emission: thermal atmospheric emission and synchrotron emission from energetic electrons spiralling in Jupiter's magnetic field. Later in situ measurements confirmed the existence of Jupiter's high-energy electron-radiation belts, with evidence for elect…
The Characterisation of Titan's Atmospheric Physical Properties by the Huygens Atmospheric Structure Instrument (Hasi)
Rodrigo, R.; Barucci, M. A.; Fulchignoni, M. +25 more
The Huygens Atmospheric Structure Instrument (HASI) is a multi-sensor package which has been designed to measure the physical quantities characterising the atmosphere of Titan during the Huygens probe descent on Titan and at the surface. HASI sensors are devoted to the study of Titan's atmospheric structure and electric properties, and to provide …
The Descent Imager/Spectral Radiometer (DISR) Experiment on the Huygens Entry Probe of Titan
Tomasko, M. G.; Smith, P. H.; Fellows, C. +11 more
The payload of the Huygens Probe into the atmosphere of Titan includes the Descent Imager/Spectral Radiometer (DISR). This instrument includes an integrated package of several optical instruments built around a silicon charge coupled device (CCD) detector, a pair of linear InGaAs array detectors, and several individual silicon detectors. Fiber opt…
Magnetospheric and Plasma Science with Cassini-Huygens
Gurnett, D. A.; Dougherty, M. K.; Tsurutani, B. T. +27 more
Magnetospheric and plasma science studies at Saturn offer a unique opportunity to explore in-depth two types of magnetospheres. These are an ‘induced’ magnetosphere generated by the interaction of Titan with the surrounding plasma flow and Saturn's ‘intrinsic’ magnetosphere, the magnetic cavity Saturn's planetary magnetic field creates inside the …
The dusk flank of Jupiter's magnetosphere
Gurnett, D. A.; Dougherty, M. K.; Hospodarsky, G. B. +8 more
Limited single-spacecraft observations of Jupiter's magnetopause have been used to infer that the boundary moves inward or outward in response to variations in the dynamic pressure of the solar wind. At Earth, multiple-spacecraft observations have been implemented to understand the physics of how this motion occurs, because they can provide a snap…
The Huygens Doppler Wind Experiment - Titan Winds Derived from Probe Radio Frequency Measurements
Plettemeier, D.; Bird, M. K.; Wohlmuth, R. +10 more
A Doppler Wind Experiment (DWE) will be performed during the Titan atmospheric descent of the ESA Huygens Probe. The direction and strength of Titan's zonal winds will be determined with an accuracy better than 1 m s-1 from the start of mission at an altitude of ∼160 km down to the surface. The Probe's wind-induced horizontal motion wil…
Laboratory calibration of the cassini cosmic dust analyser (CDA) using new, low density projectiles
Srama, R.; Grün, E.; Müller, M. +9 more
The Cassini Cosmic Dust Analyser (CDA), developed from the Galileo and Ulysses dust instruments with the addition of a Chemical Analyser, is currently travelling outward from the Earth (collecting data from March 1999 onward) to the Saturnian system (arrival 2004) via Jupiter. The Chemical Analyser will provide information on the elemental composi…
Saturn's Rings: pre-Cassini Status and Mission Goals
Nicholson, P. D.; Spilker, L. J.; Porco, C. C. +8 more
Theoretical and observational progress in studies of Saturn's ring system since the mid-1980s is reviewed, focussing on advances in configuration and dynamics, composition and size distribution, dust and meteoroids, interactions of the rings with the planet and the magnetosphere, and relationships between the rings and various satellites. The Cass…