Ground calibration results of the JUICE ultraviolet spectrograph

Michael W. Davis; G. Randall Gladstone; Rohini S. Giles; Thomas K. Greathouse; Philippa M. Molyneux; Ujjwal Raut; Kurt D. Retherford; Sue Baldor; Maarten H. Versteeg; Matthew Freeman; Kristian Persson; Steven C. Persyn

doi:10.1117/12.2562986

13 December 2020 Ground calibration results of the JUICE ultraviolet spectrograph

Michael W. Davis, G. Randall Gladstone, Rohini S. Giles, Thomas K. Greathouse, Philippa M. Molyneux, Ujjwal Raut, Kurt D. Retherford, Sue Baldor, Maarten H. Versteeg, Matthew Freeman, Kristian Persson, Steven C. Persyn

Author Affiliations +

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 1144404 (2020) https://doi.org/10.1117/12.2562986
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We describe the radiometric performance and ground calibration results of the JUpiter ICy moons Explorer Ultraviolet Spectrograph (JUICE-UVS) instrument. JUICE-UVS is a modest power (8 W) ultraviolet spectrograph that is the fifth in a series of Alice/UVS instruments built by Southwest Research Institute. JUICE-UVS covers a 50-204 nm bandpass with 0.4 nm spectral resolution over a 7.5° field of view with better than 0.3° spatial resolution. JUICE-UVS also features three different observing modes to allow higher-than-nominal spatial resolution observing as well as solar occultations in the Jupiter system. JUICE-UVS meets all performance requirements with margin, and is the first planetary UV spectrograph to feature a microchannel plate detector with an atomic layer deposition (ALD) coating to minimize in-flight gain loss due to accumulated fluence. JUICE-UVS also features both a time-tagged pixel list observing mode and a programmable histogram mode to maximize observational flexibility and data management. During the main JUICE mission, JUICE-UVS will explore the atmospheres and surfaces of the Galilean satellites, examine the dynamics of Jupiter’s upper atmosphere from pole to equator, and investigate the Jupiter-Io connection through observations of the Io torus.

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Michael W. Davis, G. Randall Gladstone, Rohini S. Giles, Thomas K. Greathouse, Philippa M. Molyneux, Ujjwal Raut, Kurt D. Retherford, Sue Baldor, Maarten H. Versteeg, Matthew Freeman, Kristian Persson, and Steven C. Persyn "Ground calibration results of the JUICE ultraviolet spectrograph", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 1144404 (13 December 2020); https://doi.org/10.1117/12.2562986

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