Search Results - "Willame, Yannick"
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Optical Constants of Martian Dust Analogs at UV–Visible–Near-infrared Wavelengths
Published in The Astrophysical journal. Supplement series (01-10-2023)“…Abstract We present an advanced light-scattering model to retrieve the optical constants of three Martian dust analogs: Johnson Space Center regolith simulant,…”
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Experimental Scattering Matrices of Martian Dust Aerosols with Narrow Particle-size Distributions
Published in The Astrophysical journal. Supplement series (01-08-2024)“…Abstract We present experimental scattering matrices of the JSC Mars-1, MMS-2, and MGS-1 simulants at 488 and 640 nm. The analogs were processed so that narrow…”
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Calibration of NOMAD on ESA's ExoMars Trace Gas Orbiter: Part 1 – The Solar Occultation channel
Published in Planetary and space science (01-09-2022)“…Nadir and Occultation for MArs Discovery (NOMAD) is a 3-channel spectrometer suite that is currently orbiting Mars onboard ESA's ExoMars Trace Gas Orbiter,…”
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Calibration of NOMAD on ESA's ExoMars Trace Gas Orbiter: Part 2 – The Limb, Nadir and Occultation (LNO) channel
Published in Planetary and space science (01-09-2022)“…The Nadir and Occultation for MArs Discovery (NOMAD) instrument is a 3-channel spectrometer suite on the ESA ExoMars Trace Gas Orbiter. Since April 2018, when…”
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Removal of straylight from ExoMars NOMAD-UVIS observations
Published in Planetary and space science (01-09-2022)“…We present an in-flight straylight removal method for the Ultraviolet and Visible Spectrometer (UVIS) channel of the Nadir and Occultation for Mars Discovery…”
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Evaluation of the Capability of ExoMars-TGO NOMAD Infrared Nadir Channel for Water Ice Clouds Detection on Mars
Published in Remote sensing (Basel, Switzerland) (01-09-2022)“…As part of the payload of the 2016 ExoMars Trace Gas Orbiter (TGO) mission, the Nadir and Occultation for MArs Discovery (NOMAD) suite instrument has been…”
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ExoMars TGO/NOMAD‐UVIS Vertical Profiles of Ozone: 2. The High‐Altitude Layers of Atmospheric Ozone
Published in Journal of geophysical research. Planets (01-11-2021)“…Solar occultations performed by the Nadir and Occultation for MArs Discovery (NOMAD) ultraviolet and visible spectrometer (UVIS) onboard the ExoMars Trace Gas…”
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Unexpected increase of the deuterium to hydrogen ratio in the Venus mesosphere
Published in Proceedings of the National Academy of Sciences - PNAS (20-08-2024)“…This study analyzes H O and HDO vertical profiles in the Venus mesosphere using Venus Express/Solar Occultation in the InfraRed data. The findings show…”
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Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars
Published in Journal of geophysical research. Space physics (01-12-2023)“…Precipitation of solar energetic particles (SEPs) into planetary atmospheres causes changes in atmospheric chemical composition through ionization,…”
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Composition and Chemistry of the Martian Atmosphere as Observed by Mars Express and ExoMars Trace Gas Orbiter
Published in Space science reviews (01-10-2024)“…The atmosphere of Mars has been studied for many years now by a long series of missions. The paper focuses on the results obtained by two of these that are led…”
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SPICAM on Mars Express: A 10 year in-depth survey of the Martian atmosphere
Published in Icarus (New York, N.Y. 1962) (15-11-2017)“…•Results are presented from the Mars Express SPICAM instrument, which is a dual UV-IR instrument.•The presented dataset encompasses 10 terrestrial years of…”
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Methane on Mars: New insights into the sensitivity of CH4 with the NOMAD/ExoMars spectrometer through its first in-flight calibration
Published in Icarus (New York, N.Y. 1962) (15-03-2019)“…•A complete spectral in-flight calibration of NOMAD is presented.•A model to compute spectral continuum is produced as a function of instrument…”
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Calibration of the NOMAD-UVIS data
Published in Planetary and space science (01-09-2022)“…The Ultraviolet and VIsible Spectrometer (UVIS), covering the 200–650 nm range, is one of three spectrometers that comprise the NOMAD instrument on the…”
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Impact of gradients at the martian terminator on the retrieval of ozone from SPICAM/MEx
Published in Icarus (New York, N.Y. 1962) (01-01-2021)“…Rapid variations of pressure, temperature and illumination at the day–night terminator have the potential to cause asymmetries in the abundance distribution of…”
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Water Heavily Fractionated as it Ascends on Mars as Revealed by ExoMars/NOMAD
Published in Science advances (01-02-2021)“…Isotopic ratios, and in particular the water D/Hratio, are powerful tracers of the evolutionand transportof water on Mars. From measurements performed with…”
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Publisher Correction: No detection of methane on Mars from early ExoMars Trace Gas Orbiter observations
Published in Nature (London) (01-05-2019)“…The surname of author Cathy Quantin-Nataf was misspelled ‘Quantin-Nata’, authors Ehouarn Millour and Roland Young were missing from the ACS and NOMAD Science…”
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Vertical Aerosol Distribution and Mesospheric Clouds From ExoMars UVIS
Published in Journal of geophysical research. Planets (01-05-2022)“…The vertical opacity structure of the martian atmosphere is important for understanding the distribution of ice (water and carbon dioxide) and dust. We present…”
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Detection of green line emission in the dayside atmosphere of Mars from NOMAD-TGO observations
Published in Nature astronomy (01-11-2020)“…The oxygen emission at 557.7 nm is a ubiquitous component of the spectrum of the terrestrial polar aurora and the reason for its usual green colour 1 . It is…”
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Publisher Correction: Martian dust storm impact on atmospheric H 2 O and D/H observed by ExoMars Trace Gas Orbiter
Published in Nature (London) (17-04-2019)“…The surname of author Cathy Quantin-Nataf was misspelled 'Quantin-Nata' , authors Ehouarn Millour and Roland Young were missing from the ACS Science Team list,…”
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