Mr. Philippe Kubik Profile

Philippe Kubik

Engineer at Ctr National d'Études Spatiales

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Author

Publications (9)

Proceedings Article | 21 November 2017 Open Access

Backthinned TDI CCD image sensor design and performance for the Pleiades high resolution Earth observation satellites

A. Materne, A. Bardoux, H. Geoffray, T. Tournier, P. Kubik, D. Morris, I. Wallace, C. Renard

Proceedings Volume 10567, 105671N (2017) https://doi.org/10.1117/12.2308100

KEYWORDS: Satellites, Sensors, Modulation transfer functions, Satellite imaging, CCD image sensors, Image resolution, Earth observing sensors, Quantum efficiency, Video, Silicon

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Proceedings Article | 20 November 2017 Open Access

First in-flight results of Pleiades 1A innovative methods for optical calibration

Philippe Kubik, Laurent Lebègue, Sébastien Fourest, Jean-Marc Delvit, Françoise de Lussy, Daniel Greslou, Gwendoline Blanchet

Proceedings Volume 10564, 1056407 (2017) https://doi.org/10.1117/12.2309056

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The PLEIADES program is a space Earth Observation system led by France, under the leadership of the French Space Agency (CNES). Since it was successfully launched on December 17^th, 2011, Pleiades 1A high resolution optical satellite has been thoroughly tested and validated during the commissioning phase led by CNES. The whole system has been designed to deliver submetric optical images to users whose needs were taken into account very early in the design process. This satellite opens a new era in Europe since its off-nadir viewing capability delivers a worldwide 2- days access, and its great agility will make possible to image numerous targets, strips and stereo coverage from the same orbit. Its imaging capability of more than 450 images of 20 km x 20 km per day can fulfill a broad spectrum of applications for both civilian and defence users.

For an earth observing satellite with no on-board calibration source, the commissioning phase is a critical quest of wellcharacterized earth landscapes and ground patterns that have to be imaged by the camera in order to compute or fit the parameters of the viewing models. It may take a long time to get the required scenes with no cloud, whilst atmosphere corrections need simultaneous measurements that are not always possible.

The paper focuses on new in-flight calibration methods that were prepared before the launch in the framework of the PLEIADES program : they take advantage of the satellite agility that can deeply relax the operational constraints and may improve calibration accuracy. Many performances of the camera were assessed thanks to a dedicated innovative method that was successfully validated during the commissioning period : Modulation Transfer Function (MTF), refocusing, absolute calibration, line of sight stability were estimated on stars and on the Moon. Detectors normalization and radiometric noise were computed on specific pictures on Earth with a dedicated guidance profile. Geometric viewing frame was determined with a particular image acquisition combining different views of the same target.

All these new methods are expected to play a key role in the future when active optics will need sophisticated in-flight calibration strategy.

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Proceedings Article | 23 September 2013 Paper

PLEIADES-HR 1A&1B image quality commissioning: innovative radiometric calibration methods and results

Vincent Martin, Gwendoline Blanchet, Philippe Kubik, Sophie Lacherade, Christophe Latry, Laurent Lebegue, Florie Lenoir, Florence Porez-Nadal

Proceedings Volume 8866, 886610 (2013) https://doi.org/10.1117/12.2023337

KEYWORDS: Satellites, Signal to noise ratio, Modulation transfer functions, Calibration, Sensors, Image quality, Image compression, Target acquisition, Point spread functions, Deconvolution

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Proceedings Article | 23 September 2013 Paper

PLEIADES satellites image quality commissioning

Laurent Lebègue, Daniel Greslou, Gwendoline Blanchet, Françoise de Lussy, Sébastien Fourest, Vincent Martin, Christophe Latry, Philippe Kubik, Jean-Marc Delvit, Cécile Dechoz, Virginie Amberg

Proceedings Volume 8866, 88660Z (2013) https://doi.org/10.1117/12.2023288

KEYWORDS: Satellites, Image quality, Satellite imaging, Calibration, Sensors, Image compression, Satellite communications, Stars, Clouds, Cartography

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Proceedings Article | 21 October 2005 Paper

Pleiades image quality: from users' needs to products definition

Philippe Kubik, Véronique Pascal, Christophe Latry, Simon Baillarin

Proceedings Volume 5978, 59780L (2005) https://doi.org/10.1117/12.627570

KEYWORDS: Image processing, Sensors, Image quality, Satellites, Modulation transfer functions, Cameras, Satellite imaging, Image sensors, Signal to noise ratio, Image resolution

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Proceedings Article | 4 November 2004 Paper

AMETHIST: a method for equalization thanks to HISTograms

Philippe Kubik, Veronique Pascal

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565091

KEYWORDS: Sensors, Satellites, Signal detection, Image quality, Calibration, Image segmentation, Cameras, Space operations, Retina, Charge-coupled devices

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Proceedings Article | 4 November 2004 Paper

A new method for in-flight radiometric noise assessment: application to SPOT5

Véronique Pascal, Francois-Xavier Chaffaut, Philippe Kubik, Laurent Lebegue, Christophe Valorge, Mathieu Jung

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565110

KEYWORDS: Signal to noise ratio, Interference (communication), Calibration, Sensors, Statistical methods, Image quality, Image processing, Image compression, Lamps, Satellites

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Proceedings Article | 21 December 1998 Paper

SPOT4: first in-flight absolute calibration results

Aime Meygret, Patrice Henry, Magdeleine Dinguirard, Paul Soule, Bernard Cabrieres, Philippe Kubik, Philippe Hazane, Xavier Briottet, Marie-Christine Laubies

Proceedings Volume 3498, (1998) https://doi.org/10.1117/12.333648

KEYWORDS: Calibration, Cameras, Sensors, Lamps, Sun, Vegetation, Satellites, Optical fibers, Scattering, Bismuth

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Proceedings Article | 21 December 1998 Paper

SPOT4 HRVIR first in-flight image quality results

Philippe Kubik, Eric Breton, Aime Meygret, Bernard Cabrieres, Philippe Hazane, Dominique Leger

Proceedings Volume 3498, (1998) https://doi.org/10.1117/12.333652

KEYWORDS: Calibration, Modulation transfer functions, Short wave infrared radiation, Sensors, Image quality, Cameras, Satellites, Signal to noise ratio, Image registration, Satellite imaging

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Showing 5 of 9 publications

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