The MAJIS (Moons and Jupiter Imaging Spectrometer) instrument is an imaging spectrometer on-board the JUICE (JUpiter ICy moons Explorer) spacecraft. MAJIS covers the spectral range from 0.5 to 5.54 μm with two channels [visible–near infrared (VISNIR) and IR]. A comprehensive campaign of on-ground MAJIS calibration was conducted in August and September 2021 in the IAS (Institut d’Astrophysique Spatiale, CNRS/Université Paris-Saclay) facilities. In this article, we present the results relevant for the radiometric calibration of MAJIS. Due to the specific characteristics of the MAJIS detectors (H1RG from Teledyne), an extensive detector characterization campaign was implemented for both the VISNIR and IR detectors before integration so as to validate readout procedures providing precision and accuracy. The characterization also provided critical information on linearity and operability as a function of the integration time and operating temperature. The radiometric calibration of the integrated MAJIS instrument focused on the determination of the instrument transfer function in terms of DN output per unit of radiance for each MAJIS data element as a function of its position in the field of view of MAJIS and its central wavelength. The radiometric calibration of the VISNIR channel required a specific procedure due to stray light at short wavelengths. Observations of an internal calibration source during calibration and after launch (April 14, 2023) showed that there were minor changes in both the VISNIR and IR channels. The instrument transfer functions to be used in flight have been updated on this basis.
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November 2024
Research Article|
November 18 2024
Calibration of MAJIS (Moons and Jupiter Imaging Spectrometer). IV. Radiometric calibration (invited)
Y. Langevin
;
Y. Langevin
a)
(Conceptualization, Data curation, Investigation, Methodology, Supervision, Validation, Writing – original draft)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
a)Author to whom correspondence should be addressed: [email protected]
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F. Poulet;
F. Poulet
(Data curation, Funding acquisition, Investigation, Supervision, Validation, Writing – review & editing)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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G. Piccioni
;
G. Piccioni
(Funding acquisition, Investigation, Supervision, Validation)
2
Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica
, Rome 00133, Italy
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G. Filacchione
;
G. Filacchione
(Conceptualization, Data curation, Investigation, Validation)
2
Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica
, Rome 00133, Italy
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C. Dumesnil
;
C. Dumesnil
(Funding acquisition, Investigation, Project administration, Resources, Supervision)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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F. Tosi
;
F. Tosi
(Data curation, Methodology)
2
Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica
, Rome 00133, Italy
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J. Carter
;
J. Carter
(Data curation, Investigation, Validation)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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A. Barbis;
A. Barbis
(Data curation, Investigation, Methodology)
3
Leonardo Company
, via delle Officine Galileo, 1, Campi Bisenzio 50013, Italy
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P. Haffoud
;
P. Haffoud
(Data curation, Investigation, Validation)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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L. Tommasi;
L. Tommasi
(Conceptualization, Funding acquisition, Investigation, Project administration, Resources)
3
Leonardo Company
, via delle Officine Galileo, 1, Campi Bisenzio 50013, Italy
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M. Vincendon
;
M. Vincendon
(Conceptualization, Investigation, Methodology)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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S. De Angelis
;
S. De Angelis
(Data curation, Investigation)
2
Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica
, Rome 00133, Italy
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I. Guerri;
I. Guerri
(Conceptualization, Investigation)
3
Leonardo Company
, via delle Officine Galileo, 1, Campi Bisenzio 50013, Italy
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C. Pilorget
;
C. Pilorget
(Conceptualization, Investigation)
1
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay
, Orsay 91400, France
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S. Rodriguez
;
S. Rodriguez
(Data curation, Investigation)
4
Institut de Physique du Globe de Paris, CNRS-Université Paris-Cité
, Paris 75005, France
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S. Stefani
;
S. Stefani
(Data curation, Investigation)
2
Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica
, Rome 00133, Italy
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D. Bolsée
;
D. Bolsée
(Funding acquisition, Investigation, Methodology, Supervision)
5
Royal Belgian Institute for Space Aeronomy Av. Circulaire 3
, 1180 Brussels, Belgium
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M. Cisneros
;
M. Cisneros
(Data curation, Investigation, Validation)
5
Royal Belgian Institute for Space Aeronomy Av. Circulaire 3
, 1180 Brussels, Belgium
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L. Van Laeken;
L. Van Laeken
(Data curation, Investigation, Validation)
5
Royal Belgian Institute for Space Aeronomy Av. Circulaire 3
, 1180 Brussels, Belgium
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N. Pereira
;
N. Pereira
(Conceptualization, Investigation, Methodology)
5
Royal Belgian Institute for Space Aeronomy Av. Circulaire 3
, 1180 Brussels, Belgium
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A. Carapelle
A. Carapelle
(Conceptualization, Funding acquisition, Investigation)
6
Centre Spatial de Liège - Université de Liège
, Avenue du Pré-Aily, B-4031 Angleur-Liège, Belgium
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a)Author to whom correspondence should be addressed: [email protected]
Rev. Sci. Instrum. 95, 111301 (2024)
Article history
Received:
February 06 2024
Accepted:
October 14 2024
Citation
Y. Langevin, F. Poulet, G. Piccioni, G. Filacchione, C. Dumesnil, F. Tosi, J. Carter, A. Barbis, P. Haffoud, L. Tommasi, M. Vincendon, S. De Angelis, I. Guerri, C. Pilorget, S. Rodriguez, S. Stefani, D. Bolsée, M. Cisneros, L. Van Laeken, N. Pereira, A. Carapelle; Calibration of MAJIS (Moons and Jupiter Imaging Spectrometer). IV. Radiometric calibration (invited). Rev. Sci. Instrum. 1 November 2024; 95 (11): 111301. https://doi.org/10.1063/5.0202702
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