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The JANUS (Jovis Amorum ac Natorum Undique Scrutator) VIS-NIR Multi-Band Imager for the JUICE Mission

Palumbo, P; Roatsch, T; Lara, LM; Castro-Marin, JM; Della Corte, V; Hviid, S; Jaumann, R; ... Yair, Y; + view all (2025) The JANUS (Jovis Amorum ac Natorum Undique Scrutator) VIS-NIR Multi-Band Imager for the JUICE Mission. Space Science Reviews , 221 (3) , Article 32. 10.1007/s11214-025-01158-6. Green open access

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Abstract

The JANUS instrument (Jovis, Amorum ac Natorum Undique Scrutator) aboard the JUpiter ICy moons Explorer (JUICE) is a multispectral camera enabling imaging in the 380-1080 nm wavelength range. The performance and capability of JANUS fulfils all requirements for imaging the variety of different targets JUICE will investigate, including the icy satellites, Io, small inner and irregular moons, the rings and Jupiter itself. JUICE’s orbital trajectory in the Jupiter system will allow icy Galilean satellites observations from afar to closest approaches of a few hundred kilometres, resulting in spatial sampling from km/pixel down to 3 m/pixel respectively. All other targets will be observed from a distance > several 105 km, i.e. spatial sampling above several km/pixel. Thirteen bandpass filters provide good spectral coverage with bandwidths from several tens of nm down to 10 nm. The spectral resolution of JANUS will provide unprecedented characterization of endogenic and exogenic geological processes that shaped the icy satellites surfaces, enable monitoring of volcanic activity on Io, and enable investigation of the physical and dynamical properties of small satellites and rings. The dynamics of Jupiter’s atmosphere will be characterised over more than three years at different altitudes thanks to the ad-hoc selected filters. This paper briefly summarizes the science objectives of JANUS and describes in some detail the instrument architecture, its design, performances and observational capabilities. Although specific aspects, like e.g. data calibration, will be covered in future papers, this work is aimed at offering a general reference to the science enabled by JANUS and the design and capabilities of the instrument.

Type: Article
Title: The JANUS (Jovis Amorum ac Natorum Undique Scrutator) VIS-NIR Multi-Band Imager for the JUICE Mission
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s11214-025-01158-6
Publisher version: https://doi.org/10.1007/s11214-025-01158-6
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10206543
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