Dr. Denis Siméoni Profile

Dr. Denis Siméoni

at Thales Alenia Space

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Publications (9)

Proceedings Article | 12 July 2023 Open Access

Stray light analysis of Compact Gas Imager

V. Khodnevych, D. Simeoni

Proceedings Volume 12777, 127775B (2023) https://doi.org/10.1117/12.2690998

KEYWORDS: Optical path differences, Modulation, Interferometers, Interferograms, Imaging systems, Stray light, Reflection, Light scattering, Stray light analysis, Optical surfaces

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Proceedings Article | 12 July 2023 Open Access

Compact static interferometer instrument studies for greenhouse gas detection

Flavio Mariani, Denis Simeoni, Nurcan Alpay Koc, Vitalii Khodnevych, Nicolas Tetaz, Bruno Chetrite, Mikael Carlavan, Stephane Ferron, Jean-Luc Vergely, Nick van der Valk, Hedser van Brug, Benjamin Brenny, Huib Visser, Jochen Landgraf, Stephanie Rusli, Roman Windpassinger, Bernd Sierk

Proceedings Volume 12777, 127771V (2023) https://doi.org/10.1117/12.2689941

KEYWORDS: Equipment, Carbon monoxide, Optical path differences, Interferometers, Near infrared, Short wave infrared radiation, Aerosols, Atmospheric modeling, Astronomical imaging, Spatial resolution

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Proceedings Article | 28 October 2022 Paper

CarbonCGI road map to observe faint GHG source’s emissions with high resolution observing system

D. Siméoni, F. Graziosi, G. Broquet, P. Kumar, P. Ciais, J. Vergely, S. Ferron, V. Khodnevych, M. Carlavan, B. Chétrite, N. Tetaz, C. Delzenne, N. Guercio, H. Boesch, L. Vogel, F. Mariani, R. Windpassinger, B. Sierk

Proceedings Volume 12264, 122640D (2022) https://doi.org/10.1117/12.2638495

KEYWORDS: Atmospheric modeling, Sensors, Imaging systems, Aerosols, Near infrared, Radiative transfer, Modeling, Carbon dioxide, Interferometers, Image registration

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Proceedings Article | 21 November 2017 Open Access

IASI instrument: technical description and measured performances

Ph. Hébert, D. Blumstein, C. Buil, T. Carlier, G. Chalon, P. Astruc, A. Clauss, D. Siméoni, B. Tournier

Proceedings Volume 10568, 1056806 (2017) https://doi.org/10.1117/12.2308007

KEYWORDS: Calibration, Performance modeling, Temperature metrology, Interferometers, Sensors, Imaging systems, Spectral resolution, Mirrors, Satellites, Absorption

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Proceedings Article | 21 November 2017 Open Access

Instrumental concept and preliminary performances of SIFTI: static infrared fourier transform interferometer

Philippe-Jean Hébert, E. Cansot, C. Pierangelo, C. Buil, F. Bernard, J. Loesel, T. Trémas, L. Perrin, E. Courau, C. Casteras, I. Maussang, D. Simeoni

Proceedings Volume 10566, 1056623 (2017) https://doi.org/10.1117/12.2308253

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The SIFTI (Static Infrared Fourier Transform Interferometer) instrument aims at supporting an important part in a mission for atmospheric pollution sounding from space, by providing high spectral resolution and high Signal to Noise Ratio spectra of the atmosphere. They will allow to resolve tropospheric profiles of ozone (0₃) and carbon monoxide (C0), especially down to the planetary boundary layer (PBL), an altitude region of very high interest, though poorly monitored to date, for air quality and pollution monitoring. The retrieved profile of ozone, resp. C0, will contain 5 to 7, resp. 2.5 to 4, independent pieces of information.

The French space agency CNES (Centre National d'Etudes Spatiales) has proposed and is studying an instrument concept for SIFTI based on a static interferometer, where the needed optical path are generated by a pair of crossed staircase fixed mirrors (replacing the moving reflector of dynamic Fourier transform interferometers like IASI or MIPAS). With the SIFTI design, a very high spectral resolution (~0.1 cm^-1 apodised) is achieved in a very compact optical setup, allowing a large throughput, hence a high SNR. The measurements are performed in the 9.5 μm band for 03 and in the 4.6 μm band for C0.

The science return of the sounder can be further increased if an "intelligent pointing" process is implemented. This consists in combining the TIR sounder with a companion TIR imager, providing information on the cloud coverage in the next observed scene. 0nboard, real-time analysis of the IR image is used to command the sounder staring mirror to cloud free areas, which will maximize the probability for probing down to the surface. After the first part of the phase A, the architecture of SIFTI was studied as a trade-off between performance and resource budget. We review the main architecture and functional choices, and their advantages. The preliminary instrument concept is then presented in its main aspects and in terms of main subsystem functions.

The preliminary budgets of mass, volume, size and power are also evaluated. Eventually the science performances are estimated, at instrument level and at mission level, and are compared to the specifications. To finish, the ways forward are discussed.

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Proceedings Article | 4 November 2004 Paper

Design and development of IASI instrument

Denis Simeoni, Patrick Astruc, Didier Miras, Claude Alis, Odile Andreis, Denis Scheidel, Cyril Degrelle, Patrick Nicol, Bruno Bailly, Patrice Guiard, Alain Clauss, Denis Blumstein, Thierry Maciaszek, Gilles Chalon, Thierry Carlier, Gohkan Kayal

Proceedings Volume 5543, (2004) https://doi.org/10.1117/12.561090

KEYWORDS: Interferometers, Calibration, Sensors, Mirrors, Black bodies, Digital signal processing, Temperature metrology, Thermal modeling, Interfaces, Electronics

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Proceedings Article | 4 November 2004 Paper

IASI instrument: technical overview and measured performances

Denis Blumstein, Gilles Chalon, Thierry Carlier, Christian Buil, Philippe Hebert, Thierry Maciaszek, G. Ponce, Thierry Phulpin, Bernard Tournier, Denis Simeoni, Patrick Astruc, Alain Clauss, Gohkahn Kayal, R. Jegou

Proceedings Volume 5543, (2004) https://doi.org/10.1117/12.560907

KEYWORDS: Calibration, Temperature metrology, Sensors, Fourier transforms, Spectral calibration, Black bodies, Mirrors, Imaging systems, Infrared radiation, Interferometers

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Proceedings Article | 21 October 1996 Paper

CIRCE: a new approach to performance management of optical instruments

Sandrine Philoreau, Denis Simeoni, Didier Miras, Y. Papegay, J. De Sousa

Proceedings Volume 2817, (1996) https://doi.org/10.1117/12.255199

KEYWORDS: Performance modeling, Instrument modeling, Optical components, Signal to noise ratio, Computing systems, Mathematical modeling, Optical instrument design, Optics manufacturing, Vegetation, Satellites

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Proceedings Article | 1 August 1991 Paper

New concept for a highly compact imaging Fourier transform spectrometer

Denis Simeoni

Proceedings Volume 1479, (1991) https://doi.org/10.1117/12.44526

KEYWORDS: Interferometers, Fourier transforms, Spectroscopy, Surveillance, Beam splitters, Imaging systems, Sensors, Spectral resolution, Satellites, Relays

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