Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). III. Spectral calibration

Area of Science:

• Planetary Science
• Space Instrumentation
• Spectroscopy

Background:

• The Moons And Jupiter Imaging Spectrometer (MAJIS) is crucial for ESA's Jupiter Icy Moons Explorer mission.
• Pre-flight calibration is essential for characterizing instrument performance and identifying distortions.

Purpose of the Study:

• To present analyses of on-ground and in-flight datasets for MAJIS.
• To characterize the spectral performances of the MAJIS instrument.
• To compare derived performances against mission requirements.

Main Methods:

• Conducted two on-ground calibration campaigns at the instrument level.
• Acquired in-flight measurements during the Near-Earth Commissioning Phase.
• Analyzed spectral calibration data using monochromatic and polychromatic sources with various samples.

Main Results:

• Derived spectral sampling and spectral response functions across the entire field of view.
• Quantified spectral characteristics considering operational parameters like temperature and spectral binning.
• Compared on-ground derived performances with in-flight measurements.

Conclusions:

• MAJIS's spectral performance has been thoroughly characterized using both ground and in-flight data.
• The instrument's spectral characteristics meet the established performance requirements for the mission.
• This calibration ensures the reliability of MAJIS data for exploring Jupiter's icy moons.