Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). II. Spatial calibration

Gianrico Filacchione; Paolo Haffoud; Francois Poulet; Giuseppe Piccioni; Yves Langevin; Leonardo Tommasi; Alessandra Barbis; John Carter; Irene Guerri; Cydalise Dumesnil; Simone De Angelis; Mathieu Vincendon; Stefania Stefani; Cedric Pilorget; Federico Tosi; Sebastien Rodriguez

doi:10.1063/5.0203872

Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). II. Spatial calibration

Rev Sci Instrum. 2024 Apr 1;95(4):041301. doi: 10.1063/5.0203872.

Authors

Gianrico Filacchione¹, Paolo Haffoud², Francois Poulet², Giuseppe Piccioni¹, Yves Langevin², Leonardo Tommasi³, Alessandra Barbis³, John Carter², Irene Guerri³, Cydalise Dumesnil², Simone De Angelis¹, Mathieu Vincendon², Stefania Stefani¹, Cedric Pilorget⁴, Federico Tosi¹, Sebastien Rodriguez⁵

Affiliations

¹ INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133 Rome, Italy.
² Institut d'Astrophysique Spatial, CNRS-Université Paris-Saclay, Orsay 91400, France.
³ Leonardo Company, via delle Officine Galileo, 1, Campi Bisenzio, Florence 50013, Italy.
⁴ Institut d'Astrophysique Spatiale, CNRS-Universite Paris-Saclay, Orsay 91400, France and Institut Universitaire de France, Paris, France.
⁵ Institut de Physique du Globe de Paris, CNRS-Université Paris-Cité, Paris 75005, France.

PMID: 38651987
DOI: 10.1063/5.0203872

Abstract

MAJIS, Moons and Jupiter Imaging Spectrometer, is one of the scientific payloads aboard European Space Agency's Jupiter Icy Moons Explorer mission. This instrument underwent a comprehensive characterization and calibration campaign before integration on the spacecraft. In this work, we report on the measurements of the instrumental spatial responses, including the slit and pixel functions, the knife edge function, the ensquared energy, and the keystone aberration. The measurements were repeated in several positions of the field of view and within the range of MAJIS temperatures during science observations. The goal was to characterize the instrument's response under a wide set of conditions and at different visible-infrared wavelengths. The experimental setups employed to perform calibrations are described in detail, and the methodology applied to derive the instrumental spatial responses is discussed. After launch, minor changes in the instrument response and the coalignment between the two spectral channels were identified by comparing on-ground data with the first in-flight data returned by MAJIS.