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Your search keyword '"Francois, Francoise"' showing total 13 results
Start Over Author "Francois, Francoise" Topic [sdu.astr]sciences of the universe [physics]/astrophysics [astro-ph]
13 results on '"Francois, Francoise"'

1. Deux exemples d'applications de la spectroscopie diode laser haute performance

Author

Mondelain, D., Croizé, L., Mantz, A., Camy-Peyret, C., Francois, Francoise, Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2006

2. Progress in static Fourier transform infrared spectroscopy: assessment of SIFTI preliminary performances

Author

Elodie Cansot, Claude Camy-Peyret, Philippe Hébert, Frédéric Bernard, Alain Rosak, Clémence Pierangelo, Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Computer science, Spectral bands, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Fourier transform spectroscopy, [SDU] Sciences of the Universe [physics], Interferometry, symbols.namesake, Fourier transform, [SDU]Sciences of the Universe [physics], symbols, Calibration, Astronomical interferometer, Spectral resolution, Fourier transform infrared spectroscopy, Remote sensing
Abstract

The concept of static Fourier transform interferometry at thermal infrared wavelengths is well suited in the case of narrow spectral bands that are looked at for targeted molecular species as CO and O3 for pollution and air quality monitoring, or H 2 0 and CO 2 for weather forecast, down to the troposphere. It permits a high spectral resolution and a very good radiometric performance, with the advantage of a static interferometer, including no moving part. Along with other molecules sounded in the UV-VIS domain, as for instance in the TRAQ mission, SIFTI will provide scientists with a complete set for pollution measurements and air quality survey. Our paper presents the principles of static Fourier transform spectrometry, the work led on the instrument performance model and our study of the SIFTI instrument. We describe the instrument, its main dimensions and characteristics, and its architecture and major subsystems. We eventually make a preliminary survey of the SIFTI performance budget items. As a conclusion, we introduce the future CNES phase A study of this instrument that is started in 2006

Published
2006

3. Model, software, and database for line-mixing effects in the ν3 and ν4 bands of CH4 and tests using laboratory and planetary measurements. I. N2 (and air) broadenings and the Earth atmosphere

Author

Tran, H., Flaud, P.-M., Gabard, T., Hase, F., von Clarmann, T., Camy-Peyret, C., Payan, Sébastien, Hartmann, J.-M., Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-Chimie Moléculaire (LPCM), Université Sciences et Technologies - Bordeaux 1-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'Université de Bourgogne (LPUB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Centre National de la Recherche Scientifique (CNRS), Francois, Francoise, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut für Meteorologie und Klimaforschung (IMK), and Karlsruher Institut für Technologie (KIT)

Subjects
[SDU] Sciences of the Universe [physics], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU]Sciences of the Universe [physics], Atmotspheric absorption, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Methane infrared spectra
Abstract

Absorption spectra of the infrared ν3 and ν4 bands of CH4 perturbed by N2 over large ranges of pressure and temperature have been measured in the laboratory. A theoretical approach accounting for line mixing is proposed to (successfully) model these experiments. It is similar to that of Pieroni et al. [J Chem Phys 1999;110:7717–32] and is based on state-to-state rotational cross-sections calculated with a semi-classical approach and a few empirical parameters. The latter, which enable switching from the state space to the line space, are deduced from a fit of a single room temperature spectrum of the ν3 band at 50 atm. The comparisons between numerous measured and calculated spectra under a vast variety of conditions (ν3 and ν4, 0–500 atm, 170–300 K) then demonstrate the quality and consistency of the proposed model. This success is a first validation of a database and associated software built in order to model the shape of CH4 absorption in air, that are available and suitable for the updating of atmospheric radiative transfer codes. The accuracy of these tools is then further demonstrated using transmission measurements of the Earth atmosphere in the ν3 region (3 μm) recorded in solar absorption with ground and balloon based Fourier transform instruments. Similar tests in the ν4 region using satellite based emission spectra and ground-based transmission measurements confirm the model quality although they show very small line-mixing effects and their masking by strong contributions of other species.

Published
2006

4. EnviSat/SCIAMACHY validation with the LPMA/DOAS balloon ondola: Comparison of a) O3, NO2 and BrO profiles, b) the solar irradiance spectrum and c) limb radiances.' 21 – Communication orale

Author

Dorf, M., Pfeilsticker, K., Bösch, H., Butz, A., Chipperfield, M., Camy-Peyret, C., Gerilowski, K., Grunow, K., Kritten, L., Weidner, F., Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2006

5. Comparison of measured and modelled stratospheric BrO profiles: The need for short-live bromo-organic source gases.' –2006, 8, 379 – EGU-A-00379 - Communication orale

Author

Dorf, M., Bösch, H., Butz, A., Camy-Peyret, C., Chipperfield, M.P., Feng, W., Grunow, K., Kritten, L., Weidner, F., Pfeilsticker, K., Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2006

6. 'Emission spectroscopy of hot water vapor from H2–air deflagrative combustion in a closed cylinder

Author

P. Alkhoury, V. Pina, P. Chelin, C. Camy-Peyret, Dmitry Davidenko, Francois, Francoise, Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Chemistry, General Chemical Engineering, Analytical chemistry, General Physics and Astronomy, Energy Engineering and Power Technology, General Chemistry, Combustion, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Spectral line, [SDU] Sciences of the Universe [physics], Fuel Technology, [SDU]Sciences of the Universe [physics], Radiative transfer, Emission spectrum, Combustion chamber, Spectroscopy, Water vapor, Bar (unit)
Abstract

The water molecule is often selected as a probe of its environment to retrieve distributions of temperature and concentration in a hot gas by emission spectroscopy. A combustion chamber closed at both ends has been designed and a fast CCD camera coupled to an Ebert–Fastie spectrometer was used to experimentally validate the current spectroscopic parameters of H 2 O at high pressures and temperatures. Time-resolved H 2 O emission spectra from the deflagrative combustion of H 2 in air were recorded for temperatures from 2500 to 2800 K and final pressures from 2 to 40 bar in the spectral region 10,332–10,496 cm −1 . A time-dependent numerical model was developed; it predicts reliably the observed dynamic pressures of the H 2 –air flame after initiation of combustion. Reasonably uniform distributions of temperature and [H 2 O] simulated by this combustion code have been introduced into a line-by-line radiative transfer code. Good agreement between calculated and experimental spectra at the end of combustion was obtained, except for a few intense lines, which can be better reproduced by improving the parameters for each spectroscopic line.

Published
2005

7. Diode-laser spectroscopy: Temperature dependence of R (0) line in the ν4 band of CH4 perturbed by N2 and O2.J. Molec. Spectrosc. 2005, 233, 86-92

Author

Lepère, M., Valentin, A., Henry, A., Camy-Peyret, C., Lengelé, M., Populaire, J.-C., Blanquet, G., Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2005

8. Intercomparison of level 1 and 2 ENVISTA/SCIAMACHY products with collocated LPMA/DOAS balloon-borne measurements.'

Author

Butz, A., Dorf, M., Weidner, F., Grunow, K., Rosanov, A., Gurlit, W.C., Sioris, C., Camy-Peyret, C., Chipperfield, M., Pfeilsticker, K., Francois, Francoise, Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2004

9. 'ENVISAT validation with SPIRALE from 2202 autumn mid-latitude and 2003 winter arctic flights', 2003, SP-530, 481-486. In ESA Special Publications

Author

Moreau, G., Pirre, Michel, Taupin, F. G., Robert, Claude, Camy-Peyret, C., Laboratoire de physique et chimie de l'environnement (LPCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2003

10. Spectroscopic and thermochemical information on the O-2-O-2 collisional complex inferred from atmospheric UV/visible O-4 absorption band profile. Proceedings of the NATO ARW on Weakly interacting molecular pairs: unconventional absorbers of radiation in the atmosphere, Fontevraud, France, 29 Avril – 3 Mai 2002

Author

Pfeilsticker, K., Bosch, H., Fitzenberger, R., Camy-Peyret, C., Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2003

11. A new lightweight balloon-borne DOAS instrument for stratospheric trace gas studies

Author

Weidner, F., Bösch, H., Butz, A., Camy-Peyret, C., Dorf, M., von Friedeburg, C., Grassi, L., Kumar, R., Pfeilsticker, K., Francois, Francoise, Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2003

12. Arctic HNO3 profile measured by CAESR during ENVISAT Validation Campaign

Author

Murcray, F., Williams, J., Fogal, P., Hawat, T., Camy-Peyret, C., Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and Francois, Francoise

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Published
2003

13. SPIRALE: A multispecies high vertical resolution in-situ instrument for stratospheric chemistry', 2003, 5, 11344 – Communication orale

Author

Moreau, G., Pirre, M., Goffinont-Taupin, F., Robert, Claude, Huret, Nathalie, Camy-Peyret, C., Francois, Francoise, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES)

Subjects
[SDU] Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract

International audience; SPIRALE (French acronym for Spectromètre Infra Rouge pour l’étude de l’Atmosphère par diodes Laser Embarquées) is a balloon-borne instrument devoted to in-situ measurement of stratospheric trace species from the tropopause up to 40 km. The measurement technique is based on the quantified absorption of light emitted by tunable diode lasers in the infrared. Absorption is increased by the use of a deployable multipass cell, enabling absorption length of up to 550 meters. Since the absorption detection limit is of the order of 10-5, species of concentrations higher than 0,01 ppb can be detected. Species are detected simultaneously every second, i.e giving a vertical resolution of a few meters, which is necessary for the study of small scale processes. Up to now, 3 successful flights have provided vertical profiles of several species : O3, CO, HCl, NO, NO2, HNO3, N2O, CH4, COF2, HOCl, H2O2, CO2, H2O. A new flight is projected at the end of January 2003. The prominent results on the detected species involved in the stratospheric chemistry are presented. They highlight the excellent performances of the instrument which are also discussed.

Published
2003

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