TY - JOUR A1 - Arridge, Christopher S. A1 - Achilleos, N. A1 - Agarwal, Jessica A1 - Agnor, C. B. A1 - Ambrosi, R. A1 - Andre, N. A1 - Badman, S. V. A1 - Baines, K. A1 - Banfield, D. A1 - Barthelemy, M. A1 - Bisi, M. M. A1 - Blum, J. A1 - Bocanegra-Bahamon, T. A1 - Bonfond, B. A1 - Bracken, C. A1 - Brandt, P. A1 - Briand, C. A1 - Briois, C. A1 - Brooks, S. A1 - Castillo-Rogez, J. A1 - Cavalie, T. A1 - Christophe, B. A1 - Coates, Andrew J. A1 - Collinson, G. A1 - Cooper, J. F. A1 - Costa-Sitja, M. A1 - Courtin, R. A1 - Daglis, I. A. A1 - De Pater, Imke A1 - Desai, M. A1 - Dirkx, D. A1 - Dougherty, M. K. A1 - Ebert, R. W. A1 - Filacchione, Gianrico A1 - Fletcher, Leigh N. A1 - Fortney, J. A1 - Gerth, I. A1 - Grassi, D. A1 - Grodent, D. A1 - GrĂ¼n, Eberhard A1 - Gustin, J. A1 - Hedman, M. A1 - Helled, R. A1 - Henri, P. A1 - Hess, Sebastien A1 - Hillier, J. K. A1 - Hofstadter, M. H. A1 - Holme, R. A1 - Horanyi, M. A1 - Hospodarsky, George B. A1 - Hsu, S. A1 - Irwin, P. A1 - Jackman, C. M. A1 - Karatekin, O. A1 - Kempf, Sascha A1 - Khalisi, E. A1 - Konstantinidis, K. A1 - Kruger, H. A1 - Kurth, William S. A1 - Labrianidis, C. A1 - Lainey, V. A1 - Lamy, L. L. A1 - Laneuville, Matthieu A1 - Lucchesi, D. A1 - Luntzer, A. A1 - MacArthur, J. A1 - Maier, A. A1 - Masters, A. A1 - McKenna-Lawlor, S. A1 - Melin, H. A1 - Milillo, A. A1 - Moragas-Klostermeyer, Georg A1 - Morschhauser, Achim A1 - Moses, J. I. A1 - Mousis, O. A1 - Nettelmann, N. A1 - Neubauer, F. M. A1 - Nordheim, T. A1 - Noyelles, B. A1 - Orton, G. S. A1 - Owens, Mathew A1 - Peron, R. A1 - Plainaki, C. A1 - Postberg, F. A1 - Rambaux, N. A1 - Retherford, K. A1 - Reynaud, Serge A1 - Roussos, E. A1 - Russell, C. T. A1 - Rymer, Am. A1 - Sallantin, R. A1 - Sanchez-Lavega, A. A1 - Santolik, O. A1 - Saur, J. A1 - Sayanagi, Km. A1 - Schenk, P. A1 - Schubert, J. A1 - Sergis, N. A1 - Sittler, E. C. A1 - Smith, A. A1 - Spahn, Frank A1 - Srama, Ralf A1 - Stallard, T. A1 - Sterken, V. A1 - Sternovsky, Zoltan A1 - Tiscareno, M. A1 - Tobie, G. A1 - Tosi, F. A1 - Trieloff, M. A1 - Turrini, D. A1 - Turtle, E. P. A1 - Vinatier, S. A1 - Wilson, R. A1 - Zarkat, P. T1 - The science case for an orbital mission to Uranus: Exploring the origins and evolution of ice giant planets JF - Planetary and space science N2 - Giant planets helped to shape the conditions we see in the Solar System today and they account for more than 99% of the mass of the Sun's planetary system. They can be subdivided into the Ice Giants (Uranus and Neptune) and the Gas Giants (Jupiter and Saturn), which differ from each other in a number of fundamental ways. Uranus, in particular is the most challenging to our understanding of planetary formation and evolution, with its large obliquity, low self-luminosity, highly asymmetrical internal field, and puzzling internal structure. Uranus also has a rich planetary system consisting of a system of inner natural satellites and complex ring system, five major natural icy satellites, a system of irregular moons with varied dynamical histories, and a highly asymmetrical magnetosphere. Voyager 2 is the only spacecraft to have explored Uranus, with a flyby in 1986, and no mission is currently planned to this enigmatic system. However, a mission to the uranian system would open a new window on the origin and evolution of the Solar System and would provide crucial information on a wide variety of physicochemical processes in our Solar System. These have clear implications for understanding exoplanetary systems. In this paper we describe the science case for an orbital mission to Uranus with an atmospheric entry probe to sample the composition and atmospheric physics in Uranus' atmosphere. The characteristics of such an orbiter and a strawman scientific payload are described and we discuss the technical challenges for such a mission. This paper is based on a white paper submitted to the European Space Agency's call for science themes for its large-class mission programme in 2013. KW - Uranus KW - Magnetosphere KW - Atmosphere KW - Natural satellites KW - Rings KW - Planetary interior Y1 - 2014 U6 - https://doi.org/10.1016/j.pss.2014.08.009 SN - 0032-0633 VL - 104 SP - 122 EP - 140 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Ye, Shengyi A1 - Kurth, William S. A1 - Hospodarsky, George B. A1 - Persoon, Ann M. A1 - Sulaiman, Ali H. A1 - Gurnett, Don A. A1 - Morooka, Michiko A1 - Wahlund, Jan-Erik A1 - Hsu, Hsiang-Wen A1 - Sternovsky, Zoltan A1 - Wang, Xu A1 - Horanyi, M. A1 - Seiss, Martin A1 - Srama, Ralf T1 - Dust Observations by the Radio and Plasma Wave Science Instrument During JF - Geophysical research letters N2 - Plain Language Summary Cassini flew through the gap between Saturn and its rings for 22 times before plunging into the atmosphere of Saturn, ending its 20-year mission. The radio and plasma waves instrument on board Cassini helped quantify the dust hazard in this previously unexplored region. The measured density of large dust particles was much lower than expected, allowing high-value science observations during the subsequent Grand Finale orbits. Y1 - 2018 U6 - https://doi.org/10.1029/2018GL078059 SN - 0094-8276 SN - 1944-8007 VL - 45 IS - 19 SP - 10101 EP - 10109 PB - American Geophysical Union CY - Washington ER - TY - JOUR A1 - Ye, S. -Y. A1 - Kurth, William S. A1 - Hospodarsky, George B. A1 - Persoon, Ann M. A1 - Gurnett, Don A. A1 - Morooka, Michiko A1 - Wahlund, Jan-Erik A1 - Hsu, Hsiang-Wen A1 - Seiss, Martin A1 - Srama, Ralf T1 - Cassini RPWS dust observation near the Janus/Epimetheus orbit JF - Journal of geophysical research : Space physics N2 - During the Ring Grazing orbits near the end of Cassini mission, the spacecraft crossed the equatorial plane near the orbit of Janus/Epimetheus (similar to 2.5 Rs). This region is populated with dust particles that can be detected by the Radio and Plasma Wave Science (RPWS) instrument via an electric field antenna signal. Analysis of the voltage waveforms recorded on the RPWS antennas provides estimations of the density and size distribution of the dust particles. Measured RPWS profiles, fitted with Lorentzian functions, are shown to be mostly consistent with the Cosmic Dust Analyzer, the dedicated dust instrument on board Cassini. The thickness of the dusty ring varies between 600 and 1,000 km. The peak location shifts north and south within 100 km of the ring plane, likely a function of the precession phase of Janus orbit. KW - Saturn KW - dust KW - ring Y1 - 2018 U6 - https://doi.org/10.1029/2017JA025112 SN - 2169-9380 SN - 2169-9402 VL - 123 IS - 6 SP - 4952 EP - 4960 PB - American Geophysical Union CY - Washington ER -