28 August 2014 The JANUS camera onboard JUICE mission for Jupiter system optical imaging
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Abstract
JANUS (Jovis, Amorum ac Natorum Undique Scrutator) is the visible camera selected for the ESA JUICE mission to the Jupiter system. Resources constraints, S/C characteristics, mission design, environment and the great variability of observing conditions for several targets put stringent constraints on instrument architecture. In addition to the usual requirements for a planetary mission, the problem of mass and power consumption is particularly stringent due to the long-lasting cruising and operations at large distance from the Sun. JANUS design shall cope with a wide range of targets, from Jupiter atmosphere, to solid satellite surfaces, exosphere, rings, and lightning, all to be observed in several color and narrow-band filters. All targets shall be tracked during the mission and in some specific cases the DTM will be derived from stereo imaging. Mission design allows a quite long time range for observations in Jupiter system, with orbits around Jupiter and multiple fly-bys of satellites for 2.5 years, followed by about 6 months in orbit around Ganymede, at surface distances variable from 104 to few hundreds km. Our concept was based on a single optical channel, which was fine-tuned to cover all scientific objectives based on low to high-resolution imaging. A catoptric telescope with excellent optical quality is coupled with a rectangular detector, avoiding any scanning mechanism. In this paper the present JANUS design and its foreseen scientific capabilities are discussed.
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Vincenzo Della Corte, Vincenzo Della Corte, Nicole Schmitz, Nicole Schmitz, Michele Zusi, Michele Zusi, José Maria Castro, José Maria Castro, Mark Leese, Mark Leese, Stefano Debei, Stefano Debei, Demetrio Magrin, Demetrio Magrin, Harald Michalik, Harald Michalik, Pasquale Palumbo, Pasquale Palumbo, Ralf Jaumann, Ralf Jaumann, Gabriele Cremonese, Gabriele Cremonese, Harald Hoffmann, Harald Hoffmann, Andrew Holland, Andrew Holland, Luisa Maria Lara, Luisa Maria Lara, Björn Fiethe, Björn Fiethe, Enrico Friso, Enrico Friso, Davide Greggio, Davide Greggio, Miguel Herranz, Miguel Herranz, Alexander Koncz, Alexander Koncz, Alexander Lichopoj, Alexander Lichopoj, Ignacio Martinez-Navajas, Ignacio Martinez-Navajas, Elena Mazzotta Epifani, Elena Mazzotta Epifani, Harald Michaelis, Harald Michaelis, Roberto Ragazzoni, Roberto Ragazzoni, Thomas Roatsch, Thomas Roatsch, Julio Rodrigo, Julio Rodrigo, Emilio Rodriguez, Emilio Rodriguez, Pietro Schipani, Pietro Schipani, Matthew Soman, Matthew Soman, Mirco Zaccariotto, Mirco Zaccariotto, } "The JANUS camera onboard JUICE mission for Jupiter system optical imaging", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91433I (28 August 2014); doi: 10.1117/12.2056353; https://doi.org/10.1117/12.2056353
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