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18 results on '"Brooker, Laure"'

1. NanoCarb part 2: Performance assessment for total column CO2 monitoring from a nano-satellite

Author

Gousset, Silvère, Croizé, Laurence, Coarer, Etienne Le, Ferrec, Yann, and Brooker, Laure

Subjects
Physics - Instrumentation and Detectors, Physics - Atmospheric and Oceanic Physics
Abstract

NanoCarb is an innovative Fourier Transform imaging spectrometer dedicated to the measurement of CO2 and CH4. Both its unusual optical principle and sampling strategy allows to reach a compact design, ideal for small satellite constellation as investigated by the European project SCARBO. The NanoCarb performance assessment as well as a proof of concept are required in this framework. A strategy of design is developed to optimize the performances and reach the sensitivity target of the space mission, demonstrating the potential of the concept without drastic complexity gain. A preliminary bias mitigation in the retrieval strategy is presented concerning water for CO2 measurement, illustrating the efficiency and the flexibility of the NanoCarb partial interferogram sampling technic. The presented design reaches a random error sub-ppm for CO2 and sub-10ppb for CH4, considering a 128 to 192 km swath, respectively, for 2 or 3 km of resolution at ground. A full mitigation of the water bias is performed on CO2 band thanks to partial interferograms.

Published
2019

2. The Monitoring Nitrous Oxide Sources (MIN2OS) satellite project

Author

Ricaud, Philippe, Attié, Jean-Luc, Chalinel, Rémi, Pasternak, Frédérick, Léonard, Joël, Pison, Isabelle, Pattey, Elizabeth, Thompson, Rona L., Zelinger, Zdenek, Lelieveld, Jos, Sciare, Jean, Saitoh, Naoko, Warner, Juying, Fortems-Cheiney, Audrey, Reynal, Hélène, Vidot, Jérôme, Brooker, Laure, Berdeu, Laurent, Saint-Pé, Olivier, Patra, Prabir K., Dostál, Michal, Suchánek, Jan, Nevrlý, Václav, and Zwaaftink, Christine Groot

Published
2021
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4. Supplementary material to "The Space CARBon Observatory (SCARBO) concept: Assessment of XCO<sub>2</sub> and XCH<sub>4</sub> retrieval performance"

Author

Dogniaux, Matthieu, primary, Crevoisier, Cyril, additional, Gousset, Silvère, additional, Le Coarer, Étienne, additional, Ferrec, Yann, additional, Croizé, Laurence, additional, Wu, Lianghai, additional, Hasekamp, Otto, additional, Sic, Bojan, additional, and Brooker, Laure, additional

Published
2021
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6. The Space CARBon Observatory (SCARBO) concept: Assessment of XCO2 and XCH4 retrieval performance.

Author

Dogniaux, Matthieu, Crevoisier, Cyril, Gousset, Silvère, Le Coarer, Étienne, Ferrec, Yann, Croizé, Laurence, Lianghai Wu, Hasekamp, Otto, Sic, Bojan, and Brooker, Laure

Subjects
SPATIAL resolution, OBSERVATORIES, DEGREES of freedom, MICROSPACECRAFT, GREENHOUSE gases, SPACE-based radar
Abstract

Several single-platform satellite missions have been designed during the past decades in order to retrieve the atmospheric concentrations of anthropogenic greenhouse gases (GHG), initiating worldwide efforts towards better monitoring of their sources and sinks. To set up a future operational system for anthropogenic GHG emission monitoring, both revisit frequency and spatial resolution need to be improved. The Space CARBon Observatory (SCARBO) project aims at significantly increasing the revisit frequency of spaceborne GHG measurements, while reaching state-of-the-art precision requirements, by implementing a concept of small satellite constellation. It would accommodate a miniaturized GHG sensor named NanoCarb coupled with an aerosol instrument, the multi-angle polarimeter SPEXone. More specifically, the NanoCarb sensor is a static Fabry-Perot imaging interferometer with a 2.3 x 2.3 km² spatial resolution and 200 km swath. It samples a truncated interferogram at optical path differences (OPDs) optimally sensitive to all the geophysical parameters necessary to retrieve column-averaged dry-air mole fractions of CO2 and CH4 (hereafter XCO2 and XCH4). In this work, we present the Level 2 performance assessment of the concept proposed in the SCARBO project. We perform inverse radiative transfer to retrieve XCO2 and XCH4 directly from synthetic NanoCarb truncated interferograms, and provide their systematic and random errors, column vertical sensitivities and degrees of freedom as a function of five scattering error-critical atmospheric and observational parameters. We show that NanoCarb XCO2 and XCH4 systematic retrieval errors can be greatly reduced with SPEXone posterior outputs used as improved prior aerosol constraints. For two thirds of the soundings, located at the centre of the 200 km NanoCarb swath, XCO2 and XCH4 random errors span 0.5 – 1 ppm and 4 – 6 ppb, respectively, compliant with their respective 1-ppm and 6-ppb precision objectives. Finally, these Level 2 performance results are parameterized as a function of the explored scattering error-critical atmospheric and observational parameters in order to time-efficiently compute extensive L2 error maps for future CO2 and CH4 flux estimation performance studies. [ABSTRACT FROM AUTHOR]

Published
2021
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7. NanoCarb partie 1 : interféomètre imageur compact pour la surveillance du CO2 depuis l'espace

Author

Ferrec, Yann, Bonnery, Guillaume, Brooker, Laure, Croizé, Laurence, Gousset, Silvère, Le Coarer, Etienne, DOTA, ONERA, Université Paris Saclay (COmUE) [Palaiseau], ONERA-Université Paris Saclay (COmUE), Airbus Defence and Space [Toulouse], Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), DOTA, ONERA, Université Paris Saclay [Palaiseau], ONERA-Université Paris-Saclay, Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
OPTICAL INSTRUMENTATION, MESURE POLLUTION DE L'AIR, TELEDETECTION PASSIVE, FOURIER TRANSFORM SPECTROSCOPY, ANTHROPOGENIC GHG EMISSIONS, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, INSTRUMENTATION OPTIQUE, EMISSIONS ANTHROPOGENIQUES DE GAZ A EFFET DE SERRE, AIR POLLUTION MONITORING, PASSIVE REMOTE SENSING, FABRY-PEROT, SPECTROMETRIE PAR TRANSFORMATION DE FOURIER
Abstract

International audience; Nanocarb is a snapshot imaging interferometer concept dedicated to the measurement of CO2. Thanks to its very compact design, it is a good candidate for small satellites, which would pave the way to a constellation of satellites to monitor emission of anthropogenic greenhouse gases from space. Nanocarb is based on a multiaperture design, with a stepcase interferometric plate to measure partial interferograms. It is developed in the framework of the Scarbo project, an European project involving several partners, the aim of which being to design and analyse the performances of the Nanocarb concept, complemented by collocated compact aerosol sensor and CO2 reference instruments. The overall measurement concept will be experimentally validated through a dedicated airborne campaign featuring instrument prototypes.

Published
2018

11. NanoCarb hyperspectral sensor: on performance optimization and analysis for greenhouse gas monitoring from a constellation of small satellites.

Author

Gousset, Silvère, Croizé, Laurence, Le Coarer, Etienne, Ferrec, Yann, Rodrigo-Rodrigo, Juana, and Brooker, Laure

Abstract

NanoCarb is an innovative Fourier-transform imaging spectrometer dedicated to the measurement of CO2 and CH4. Both its unusual optical principle and sampling strategy allow to reach a compact design, ideal for small satellite constellation as investigated by the European project SCARBO. The NanoCarb performance assessment as well as a proof of concept is required in this framework. We have developed a design strategy to optimize the performances. We demonstrate the potential of the concept through an estimation of the sensitivity, compliant with the space mission target. We also present a preliminary mitigation of the bias induced by water on CO2 and CH4 retrieval, illustrating the efficiency and the flexibility of the NanoCarb partial interferogram sampling technique. The presented design reaches a sub-ppm random error for CO2 and sub-10 ppb random error for CH4, considering 128 km swath and 2 by 2 km2 ground resolution. Design optimization and more systematic performances are discussed. [ABSTRACT FROM AUTHOR]

Published
2019
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