Workshop on Instrumentation for Planetary Missions ( 2012 )
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Introduction: The Juno mission is the second mission in NASA’s New Frontiers program. Launched in August 2011, Juno arrives at Jupiter in 2016 for a one year prime mission. Juno science goals include the study of Jupiter’s origin, interior structure, deep atmosphere, aurora and magnetosphere. Juno’s orbit around Jupiter is a polar elliptical orbit with perijove approximately 5000 km above the visible cloud tops. The payload consists of a set of microwave antennas for deep sounding, magnetometers, gravity radio science, plasma and high energy charged particle detectors, electric and magnetic field radio and plasma wave instruments, ultraviolet imaging spectrograph, infrared imager and a visible camera. This paper discusses the mission and the associated challenges with developing the science instrumentation. Mission Overview: Juno uses a solar-powered, spinning spacecraft placed into an elliptical polar orbit around Jupiter. Nominally, Juno will be in a orbit around Jupiter for about one Earth-year. The prime mission has 32 orbits which allows the entire mission to be completed between solar conjunctions. Primary science data is collected during the six hours around each Perijove (PJ) pass although additional data is collected throughout the orbit. The close perijove [1.06 RJ] and polar inclination avoids the bulk of the Jovian radiation field. Even with this orbit, radiation is a major challenge and the spacecraft design mitigates this by centrally located most sensitive electronics into a single radiation vault thereby minimizing the mass required to shield. Each instrument as well as the stellar reference units all required careful design and testing to deal with the radiation environment. Further challenges included solar power at Jupiter, especially challenging given the environment.
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Pub List : Jim Bell 1 1 JAMES F . BELL III : PUBLICATIONS AS OF OCTOBER 2015
S AND CONFERENCE PRESENTATIONS 586. Bell J.F. III, J.N. Maki, G.L. Mehall, M.A. Ravine M.A. Caplinger, and the Mastcam-Z Science Team, Mastcam-Z: A Geologic, Stereoscopic,and Multispectral Investigation on the NASA Mars-2020 Rover, Abstract #1151, Presented at "International Workshop on Instrumentation for Planetary Missions (IPM2014)," Greenbelt, Maryland, November 4-7, 2014 [http://ssed.gsfc....
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تاریخ انتشار 2012