Dr. Thierry Marbach Profile

Dr. Thierry Marbach

Remote Sensing Scientist at EUMETSAT

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 12 September 2021 Presentation

Radiometric and geometric calibration/validation of EPS-SG 3MI using natural targets

Lucas Landier, Julien Nosavan, Amandine Rolland, Thierry Marbach, Bertrand Fougnie, Margarita Vazquez Navarro

Proceedings Volume 11858, 118580U (2021) https://doi.org/10.1117/12.2600202

KEYWORDS: Calibration, Reflectivity, Polarizers, Target acquisition, Spatial resolution, Short wave infrared radiation, Sensors, Satellites, Radiometry, Polarization

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Proceedings Article | 9 September 2019 Presentation + Paper

Straylight physical model and simulator for a rapid and flexible evaluation of impacts on the products derived from the EPS-SG/3MI instrument

Bertrand Fougnie, Antoine Lacan, Thierry Marbach, Alessio Canestri, Sébastien Marcq

Proceedings Volume 11127, 111270M (2019) https://doi.org/10.1117/12.2529471

KEYWORDS: Sensors, Reflectivity, Device simulation, Short wave infrared radiation, Polarization, Instrument modeling, Picture Archiving and Communication System, Satellites, Ray tracing, Signal to noise ratio

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The 3MI instrument is a multi-directional spectro-polarimeter to fly on-board the Metop-SG platform to be launched in 2022, as part of EUMETSAT’s EPS-SG system space segment. As for most of radiometers devoted to Earth Observing from space, the radiometric budget is a system budget which includes many contributors, from the raw detector signal-to-noise to the artefact introduced by the ground correction in level-1 processing. The straylight happening in the optics is one of these contributors which could sometimes become dominant in the system budget. In this context, it is required to constrain the instrumental design as well as the ground characterization and its correction by processing. This is supported by maintaining accurate understanding of the straylight and its behaviour from early on in the project in order to check its radiometric level and quantify the potential impact on the products. This paper will present the analysis done to understand and model the physical behaviour of 3MI’s straylight. Based on initial inputs from the instrument builders and assuming some simplification, a physical straylight model was derived. This model allows an easy implementation in a simulator able to add this straylight contribution to any type of images, particularly on very realistic scenes. Our physical model shows advantageous complementarity to the builder’s simulations in the sense it allows a better quantification on a wide variety of realistic images while specifications usually assume theoretical targets such as a knife-edge transition. Such a capability is needed for 3MI system activities, in particular to cope with any deviation to the performance requirements. This paper presents examples of 3MI straylight-impacted images simulated at EUMETSAT using as input 1/ a simulation of the straylight provided by the instrument builder (ESA and Leonardo), and 2/ a realistic test data set based on PARASOL and MODIS acquisitions from the A-train observatory generated by ICARE/LOA. This simulator will be used during the development of the 3MI instrument and its ground characterization in order to monitor the impact on products.

Proceedings Article | 11 October 2018 Presentation

The multiview polarimeter 3MI: preparation and overview of the in-flight characterization (Conference Presentation)

Thierry Marbach, Bertrand Fougnie, Ruediger Lang, Antoine Lacan, Rosemary Munro, Peter Schlüssel

Proceedings Volume 10785, 107850I (2018) https://doi.org/10.1117/12.2325387

KEYWORDS: Satellites, Calibration, Polarimetry, Short wave infrared radiation, Imaging systems, Earth's atmosphere, Atmospheric monitoring, Atmospheric particles, Satellite imaging, Meteorological satellites

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Proceedings Article | 7 September 2018 Presentation + Paper

The 3MI mission on-board EPS-SG: a multi-spectral multi-polarization multi-directional imager for operational characterization of aerosol and cloud

Bertrand Fougnie, Thierry Marbach, Antoine Lacan, Peter Schluessel, Ruediger Lang, Gabriele Poli, Rosemary Munro

Proceedings Volume 10764, 107640L (2018) https://doi.org/10.1117/12.2320254

KEYWORDS: Clouds, Sensors, Calibration, Aerosols, Satellites, Polarimetry, Polarization, Imaging systems, Polarizers

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Proceedings Article | 19 October 2016 Presentation + Paper

Vicarious calibration of the multiviewing channel polarisation imager (3MI) of the EUMETSAT Polar System-Second Generation (EPS-SG)

T. Marbach, B. Fougnie, A. Lacan, P. Schlüssel

Proceedings Volume 10000, 1000017 (2016) https://doi.org/10.1117/12.2239601

KEYWORDS: Calibration, Short wave infrared radiation, Satellites, Clouds, Atmospheric particles, Absorption, Sensors, Aerosols, Polarization, Rayleigh scattering

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Proceedings Article | 1 September 2015 Paper

The 3MI mission: multi-viewing-channel-polarisation imager of the EUMETSAT polar system: second generation (EPS-SG) dedicated to aerosol and cloud monitoring

T. Marbach, J. Riedi, A. Lacan, P. Schlüssel

Proceedings Volume 9613, 961310 (2015) https://doi.org/10.1117/12.2186978

KEYWORDS: Clouds, Aerosols, Atmospheric particles, Earth's atmosphere, Short wave infrared radiation, Polarization, Calibration, Scattering, Climatology, Atmospheric monitoring

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Proceedings Article | 16 October 2013 Paper

The Multi-Viewing, -Channel, -Polarisation Imager (3MI) of the EUMETSAT Polar System - Second Generation (EPS-SG) dedicated to aerosol characterisation

T. Marbach, P. Phillips, A. Lacan, P. Schlüssel

Proceedings Volume 8889, 88890I (2013) https://doi.org/10.1117/12.2028221

KEYWORDS: Aerosols, Calibration, Clouds, Imaging systems, Polarization, Head, Satellites, Channel projecting optics, Atmospheric particles, Image registration

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