Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). I. On-ground setup description and characterization

Area of Science:

• Planetary Science
• Space Instrumentation
• Spectroscopy

Background:

• The JUpiter ICy Moons Explorer (JUICE) mission requires precise instrument calibration.
• The Moon And Jupiter Imaging Spectrometer (MAJIS) is crucial for analyzing Jupiter's system.
• On-ground calibration is essential for validating instrument performance before space missions.

Purpose of the Study:

• To detail the setup and methodology for calibrating the MAJIS instrument.
• To validate the performance of the calibration setup using pre-campaign measurements.
• To present radiometric, geometric, and spectral properties for MAJIS data inversion.

Main Methods:

• Utilized a five-optical-channel setup for instrument calibration.
• Implemented strategies to mitigate thermal infrared emissions up to 5.6 µm.
• Conducted validation measurements to assess setup performance.

Main Results:

• Characterized radiometric, geometric, and spectral properties of the calibration setup.
• Evaluated MAJIS performance metrics like signal-to-noise ratio and straylight.
• Successfully obtained data for radiometric, spectral, and spatial transfer functions.

Conclusions:

• The described calibration setup and methods are suitable for MAJIS.
• Validation measurements confirm the setup's capability to support instrument calibration.
• The study provides a foundation for accurate data analysis from the JUICE mission.