JIRAM, the Jovian Infrared Auroral Mapper

Abstract

JIRAM is an imager/spectrometer on board the Juno spacecraft bound for a polar orbit around Jupiter. JIRAM is composed of IR imager and spectrometer channels. Its scientific goals are to explore the Jovian aurorae and the planet’s atmospheric structure, dynamics and composition. This paper explains the characteristics and functionalities of the instrument and reports on the results of ground calibrations. It discusses the main subsystems to the extent needed to understand how the instrument is sequenced and used, the purpose of the calibrations necessary to determine instrument performance, the process for generating the commanding sequences, the main elements of the observational strategy, and the format of the scientific data that JIRAM will produce.

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Acknowledgements

The JIRAM Project is funded by the Italian Space Agency presently under contract n. I/010/10/0.

J.I. Lunine’s work is supported by a Juno contract from SwRI to Cornell University.

Thanks go to Shawn Kang at JPL for his GEANT4 coding work related to the JIRAM noise predictions.

H.N. Becker and S. Kang’s contributions were sponsored by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

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Correspondence to Alberto Adriani.

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The JIRAM project was started by Prof. Angioletta Coradini, Co-Investigator of the Juno Science team, who passed away in September 2011. During her life, she made seminal contributions to the exploration and the study of the Solar System and was a huge force in the development of Planetology in Italy. We dedicate this paper to her memory.

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Adriani, A., Filacchione, G., Di Iorio, T. et al. JIRAM, the Jovian Infrared Auroral Mapper. Space Sci Rev 213, 393–446 (2017). https://doi.org/10.1007/s11214-014-0094-y

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Keywords

  • Juno
  • Jupiter
  • Image spectrometer
  • Jovian atmosphere
  • Jovian aurorae