Dr. Séverine Robert Profile

Dr. Séverine Robert

Senior scientist at Royal Belgian Institute for Space Aeronomy

Area of Expertise:

Spectroscopy , Atmospheres , Radiative transfer , Space Instruments

Websites:

Company Website

Séverine Robert is staff senior scientist in the Planetary Atmospheres Research Unit at the Royal Belgian Institute for Space Aeronomy (BIRA-IASB), in Belgium. Her background is in infrared spectroscopy and radiative transfer modelling. First as a scientist (SOIR /Venus Express and NOMAD /ExoMars TGO) then as a Project Manager of the VenSpec-H instrument onboard EnVision, she acquired expertise in instrumental and mission development. She is now Instrument Scientist of VenSpec-H and involved at the science level in various missions (Ariel, JUICE) and projects.

Proceedings Article | 3 October 2024 Presentation + Paper

The VenSpec suite organization: collaborative development from instrument proposal to scientific analysis

Friederike Wolff, Jörn Helbert, Giulia Alemanno, Emmanuel Marcq, Ann-Carine Vandaele, Sévrine Robert, Louisa Maria Lara, Andreas Nathues, Vanderlei Cunha Parro, Sandrine Bertran, Justin Erwin, Gisbert Peter, Benjamin Lustrement, Eddy Neefs, Roderick de Cock, Till Hagelschuer, Lisa Hafemeister, Jose Maria Castro, Pablo Gutierrez-Marques

Proceedings Volume 13144, 131440C (2024) https://doi.org/10.1117/12.3027459

KEYWORDS: Equipment, Venus, Space operations, Spectrometers, Engineering, Interfaces, Design, Clouds, Lead, Solar system

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Proceedings Article | 3 October 2024 Presentation + Paper

Design of the VenSpec-U instrument: a double UV imaging spectrometer to analyze sulfured gases in the Venus’ atmosphere

B. Lustrement, S. Bertran, N. Rouanet, A. Díaz Damián, R. Hassen-Khodja, C. Montaron, S. Ruocco, A. Vontrat, F. Vivat, L. Baggio, G. Guignan, E. Simonnet, L. Conan, C. Gabier, A. Langlois, R. Mathon, N. Nguyen-Tuong, W. Recart, T. Buey, S. Vinatier, J. Lasue, L. Lara, E. Marcq, S. Robert, J. Helbert

Proceedings Volume 13144, 131440K (2024) https://doi.org/10.1117/12.3028252

KEYWORDS: Equipment, Venus, Ultraviolet radiation, Design, Spectroscopy, Clouds, CMOS sensors, Sensors, Interfaces, Calibration

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Proceedings Article | 3 October 2024 Presentation + Paper

The VenSpec-U spectrometer onboard EnVision: sensitivity studies

Lucile Conan, Emmanuel Marcq, Benjamin Lustrement, Nicolas Rouanet, Léna Parc, Sandrine Bertran, Séverine Robert, Jörn Helbert, Giulia Alemanno

Proceedings Volume 13144, 131440L (2024) https://doi.org/10.1117/12.3027500

KEYWORDS: Matrices, Signal to noise ratio, Equipment, Ultraviolet radiation, Polarization, Venus, Contamination, Spectroscopy, Error analysis, Radiative transfer, Instrument modeling

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Proceedings Article | 3 October 2024 Presentation + Paper

Design of the VenSpec-H instrument on ESA’s EnVision mission: development of critical elements, highlighting the FFCP, and grating

Roderick De Cock, Séverine Robert, Eddy Neefs, Justin Erwin, Michael Vervaeke, Hugo Thienpont, Etienne Renotte, Philippe Klinkenberg, Benoit Borguet, Solal Thomas, Wouter Moelans, Aaron Algoedt, Lieve De Vos, Ramatha Sørensen, Moshe Blau, Ann Carine Vandaele, Ian Thomas, Sophie Berkenbosch, Lars Jacobs, Pieter Bogaert, Bram Beeckman, Ansje Brassine, Neophytos Messios, Erwin De Donder, David Bolsée, Nuno Pereira, Bojan Ristic, Paul Tackley, Taras Gerya, Stefan Kögl, Paola Kögl, Hans-Peter Gröbelbauer, Florian Wirz, Gerhard Stefan Székely, Nick Eaton, Elena Roibás-Millán, Ignacio Torralbo, Higinio Rubio-Arnaldo, José Miguel Álvarez, Daniel Navajas Ortega, Daphne Stam, Jose Castro-Marin, Jaime Jiménez Ortega, Luisa Lara, Jörn Helbert, Giulia Alemanno, Emmanuel Marcq

Proceedings Volume 13144, 131440E (2024) https://doi.org/10.1117/12.3027637

KEYWORDS: Instrumentation engineering, Optical instrument design, Remote sensing, Equipment, Sensors, Spectroscopy, Optical gratings, Optical filters, Optical surfaces, Windows, Manufacturing, Echelle gratings

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EnVision is ESA’s upcoming mission to Venus with a launch scheduled in 2031. One of the payloads on board is the VenSpec suite,1 containing three spectrometer channels, one of which is VenSpec-H. VenSpec-H (Venus Spectrometer with High resolution) performs absorption measurements in the atmosphere of Venus in four near-infrared spectral bands. VenSpec-H is developed under Belgian management and builds on heritage from instruments on Venus-Express and TGO. Techniques used in these precursor instruments are improved and complemented with new technologies to comply with the scientific goals of the EnVision mission. The operating wavelength range (1.15 - 2.5 μm) imposes stringent temperature requirements on the instrument to make nightside measurements below the Venus clouds possible. Most importantly, the spectrometer’s optical components are held in a separate cold section inside the instrument, cooled down to −45°C, to remove thermal background from the signal. To avoid heat dissipation close to the spectrometer optics, the electronic boards are kept in a separate box. Besides that, some mechanisms, placed in the warmer part of the instrument at the entrance or exit of the cold section, had to be developed: a turn window unit to protect the interior of the instrument during the aerobraking phase of the mission, a filter wheel mechanism to select the spectral bands of interest, and an integrated detector-cooler-assembly to register the spectra. Some passive optical elements in the spectrometer had low technological readiness at the start of the project. One of them is a freeform corrector plate, used to compensate for aberrations introduced in the system by a parabolic mirror. This device is developed by the Brussels Photonics lab of VUB (Brussels) using a supply chain with shape adaptive corrective polishing and dedicated metrology. Another is the echelle grating, used to disperse the incoming light into its spectral components, which is built by AMOS. Both devices are highlighted in this article.

Proceedings Article | 3 October 2024 Presentation + Paper

Electrical integration of the VenSpec spectrometer consortium: an architecture trade-off

Alexander Fitzner, Lisa Hafemeister, Simone Del Togno, Horst-Georg Lötzke, Belinda Wendler, Friederike Wolff, Jörn Helbert, Pablo Gutiérrez-Marqués, Andreas Nathues, Henry Perplies, Alexander Loose, Henning Fischer, Vrushabh Marlur, Ian Hall, Reinhard Meller, Jose Castro, Jaime Jiménez Ortega, Luisa Lara, Fernando Alvarez, Álvaro Mazuecos Nogales, Björn Fiethe, Andrès Gómez, Dennis Buchhorn, Eddy Neefs, Roderick De Cock, Justin Erwin, Séverine Robert, Ann-Carine Vandaele, Sophie Berkenbosch, Till Hagelschuer, Gisbert Peter, Martin Pertenais, Benjamin Lustrement, Rafik Hassen-Khodja, Francis Vivat, Sandrine Bertran, Emmanuel Marcq, Vanderlei Cunha Parro, Rodrigo de Marca França

Proceedings Volume 13144, 131440D (2024) https://doi.org/10.1117/12.3027605

KEYWORDS: Spectroscopy, Space operations, Switches, Interfaces, Design, Power supplies, Venus, Engineering, Equipment, Computer networks

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Proceedings Article | 3 October 2024 Presentation + Paper

Spectral mixing analysis of laboratory emissivity spectra for improved VenSpec-M/VEM data interpretation

G. Alemanno, A. Matrurilli, J. Helbert, M. Dyar, S. Adeli, C. Leight, M. McCanta, O. Barraud, A. Van Den Neucker, L. Breitenfeld, S. Smrekar, E. Marcq, S. Robert, A. Vandaele

Proceedings Volume 13144, 131440J (2024) https://doi.org/10.1117/12.3027471

KEYWORDS: Mixtures, Emissivity, Venus, Near infrared, Hematite, Reflectivity, Data modeling, Minerals, Spectroscopy, Vacuum chambers

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The Planetary Spectroscopy Laboratory (PSL) in the Department of Planetary Laboratories (PLL), German Aerospace Center (DLR) in Berlin is working on a database that will encompass a wide range of spectral measurements, studying different effects such as grain sizes, temperature, mixing and weathering. Our goal is to create a database large enough to address the diverse range of spectral characteristics that might be observed on planetary surfaces, thereby enhancing our capabilities to interpret orbital data coming from their surfaces. A part of this database is an extensive spectral library to interpret and validate data from the Venus Emissivity Mapper (VenSpec-M/VEM) of the ESA EnVision and NASA VERITAS missions. VenSpec-M/VEM will remotely collect data about the surface of Venus in the Near-InfraRed (NIR) spectral range, covering five spectral windows in the Venus atmosphere between 0.85 and 1.18 μm, to map rock types and study Venus surface composition and activity, by comparing orbital data with laboratory spectra. Here we present the first results of a study aimed at understanding the NIR spectral behavior of particulate mixtures in emissivity at Venus surface temperature varying the grain size of the components and the actual physical distribution of particles in the mixture. Spectra are acquired using a high-temperature emissivity setup coupled with a Bruker FTIR 80V spectrometer to measure NIR emissivity spectra of Venus analogs at relevant Venus surface temperatures in a vacuum environment. Detailed image analyses are performed using a Digital Microscope Keyence VHX-7000 to ensure precise mixing ratios and quantify modal mineralogy. Results show that linear mixing does not reproduce laboratory emissivity spectral behavior accurately in this wavelength range, leading to the future exploration of non-linear mixing approaches. This data provides important insight on the need for Machine Learning models as they are planned for the VEM and VenSpec-M data analysis and will be invaluable to train those algorithms. Furthermore, the datasets can help in the planning of instrumentation for future aerial and lander missions exploring the surface of Venus.

Proceedings Article | 3 October 2024 Presentation + Paper

The Venus Emissivity Mapper (VEM): instrument design and development for VERITAS and EnVision

T. Hagelschuer, M. Pertenais, I. Walter, P. Dern, S. del Togno, T. Säuberlich, A. Pohl, Y. Rosas Ortiz, K. Westerdorff, E. Kopp, A. Fitzner, C. Arcos Carrasco, D. Wendler, B. Ulmer, C. Ziemke, S. Rufini Mastropasqua, H.-G. Lötzke, G. Alemanno, J. Carron, J.-M. Réess, A. Vandaele, S. Robert, E. Marcq, J. Helbert, G. Peter

Proceedings Volume 13144, 131440G (2024) https://doi.org/10.1117/12.3028082

KEYWORDS: Near infrared, Signal to noise ratio, Sensors, Venus, Design, Optical filters, Dark current, Emissivity

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Proceedings Article | 3 October 2024 Paper

Perspectives of infrared and ultraviolet spectroscopy in the exploration of the Venusian atmosphere and surface against the background of future missions: an overview and outlook

Gabriele Arnold, Joern Helbert, Rainer Haus, Ann Carine Vandaele, Emmanuel Marcq, Solmaz Adeli, Giulia Alemanno, Séverine Robert, Heike Rauer

Proceedings Volume 13144, 131440B (2024) https://doi.org/10.1117/12.3027282

KEYWORDS: Venus, Clouds, Infrared spectroscopy, Ultraviolet radiation, Atmospheric chemistry, Planets, Carbon monoxide, Spectroscopic atmospheric monitoring techniques, Spectroscopy, Infrared radiation

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Proceedings Article | 3 October 2024 Presentation + Paper

Development of a filter wheel for VenSpec-H

Gerhard Székely, Eddy Neefs, Robert Eberli, Marco Grossmann, Samuel Tenisch, Hans-Peter Gröbelbauer, Florian Wirz, Pascal Seiler, Paola Kögl, Stefan Kögl, Lars Jacobs, Sophie Berkenbosch, Ann-Carine Vandaele, Paul Tackley, Taras Gerya, Roderick De Cock, Justin Erwin, Séverine Robert, Nuno Pereira

Proceedings Volume 13144, 131440F (2024) https://doi.org/10.1117/12.3028000

KEYWORDS: Tunable filters, Breadboards, Optical filters, Venus, Design, Spectroscopy, Equipment, Vibration, Sensors, Vacuum

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Proceedings Article | 3 October 2024 Poster + Paper

Scientific objectives and instrumental requirements of the IR spectrometer VenSpec-H onboard EnVision

S. Robert, J. Erwin, R. De Cock, I. Thomas, N. Pereira, L. Jacobs, S. Berkenbosch, D. Bolsée, F. Vanhellemont, E. Neefs, S. Aoki, B. Bézard, E. Marcq, G. Alemanno, J. Helbert, A. Vandaele

Proceedings Volume 13144, 131440W (2024) https://doi.org/10.1117/12.3027948

KEYWORDS: Venus, Spectroscopy, Radiative transfer, Spectral resolution, Clouds, Molecular spectroscopy, Molecules, Infrared spectroscopy, Infrared radiation, Atmospheric modeling

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SPIE Journal Paper | 1 August 2023 Open Access

Facility for the radiometric characterization of space-based visible-near infrared detectors

Miriam E. Cisneros-González, David Bolsée, Nuno Pereira, Lionel Van Laeken, Lars Jacobs, Ann Carine Vandaele, Özgür Karatekin, Clément Lauzin, Séverine Robert

JATIS, Vol. 9, Issue 03, 036001, (August 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.3.036001

KEYWORDS: Vacuum chambers, Photodiodes, Light sources and illumination, Lamps, Temperature metrology, Copper, Cryogenics, Vacuum, Cryocoolers, Signal detection

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Proceedings Article | 13 December 2020 Presentation + Paper

MAJIS/JUICE VIS-NIR FM and SM detectors characterization

Miriam Cisneros-González, David Bolsée, Nuno Pereira, Lionel Van Laeken, Cédric Depiesse, Lars Jacobs, Séverine Robert, Ann Vandaele, Samuel Gissot, Özgür Karatekin, François Poulet, Yves Langevin, Cydalise Dumesnil, Jean Pierre Dubois, Antoine Arondel, Paolo Haffoud, Christian Ketchazo, Veronique Hervier, Bruno Crane

Proceedings Volume 11443, 114431L (2020) https://doi.org/10.1117/12.2562063

KEYWORDS: Fermium, Frequency modulation, Sensors, Jupiter, Data modeling, Quantum efficiency, Spectroscopy, Imaging spectroscopy, Infrared imaging, Infrared spectroscopy

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Thermal-vacuum and security system of the characterization facility for MAJIS/JUICE VIS-NIR FM and SM detectors

Miriam E. Cisneros-González, David Bolsée, Lionel Van Laeken, Nuno Pereira, Pierre Gérard, Séverine Robert, Ann Vandaele, Özgür Karatekin, François Poulet, Cydalise Dumesnil, Jean Pierre Dubois, Jérémie Hansotte, Michel Le Du, Laurent Picot

Proceedings Volume 11443, 114437G (2020) https://doi.org/10.1117/12.2576308

KEYWORDS: Sensors, Frequency modulation, Fermium, Jupiter, Telecommunications, Data modeling, Control systems, Temperature metrology, Staring arrays, Spectroscopy

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Proceedings Article | 9 September 2019 Presentation + Paper

The VenSpec suite on the ESA EnVision mission to Venus

J. Helbert, A. C. Vandaele, E. Marcq, S. Robert, C. Ryan, G. Guignan, Y. Rosas-Ortiz, E. Neefs, I. Thomas, G. Arnold, G. Peter, T. Widemann, L. Lara

Proceedings Volume 11128, 1112804 (2019) https://doi.org/10.1117/12.2529248

KEYWORDS: Sensors, Venus, Spectroscopy, Clouds, Channel projecting optics, Ultraviolet radiation, Infrared spectroscopy, Optical filters, Power supplies, Mirrors

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