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Scientific objectives and instrumental requirements of the infrared spectrometer VenSpec-H onboard EnVision

dc.contributor.authorRobert, S.
dc.contributor.authorErwin, J.T.
dc.contributor.authorDe Cock, R.
dc.contributor.authorThomas, I.R.
dc.contributor.authorPereira, N.
dc.contributor.authorJacobs, L.
dc.contributor.authorBerkenbosch, S.
dc.contributor.authorBolsée, D.
dc.contributor.authorVanhellemont, F.
dc.contributor.authorNeefs, E.
dc.contributor.authorAoki, S.
dc.contributor.authorBézard, B.
dc.contributor.authorMarcq, E.
dc.contributor.authorAlemanno, G.
dc.contributor.authorHelbert, J.
dc.contributor.authorVandaele, A.C.
dc.date2025
dc.date.accessioned2025-10-28T12:32:10Z
dc.date.available2025-10-28T12:32:10Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/14376
dc.descriptionOnboard the EnVision spacecraft, there will be a suite of three spectrometers, VenSpec. One of these is called VenSpec-H where the H stands for high spectral resolution. Its scientific objectives consist of measuring variations of minor species’ abundances in the atmosphere of Venus. H2O, SO2, CO, and OCS will be measured to characterize the potentially ongoing volcanic activity. These observations will allow us to understand both the importance of volatiles in volcanic activity on Venus and their effect on cloud maintenance and dynamics. VenSpec-H will measure these molecules in nadir viewing geometry, in infrared transparency windows of Venus’ nightside to probe the troposphere, and in infrared spectral ranges on the dayside to measure the mesosphere. The scientific requirements enabling our scientific objectives will be demonstrated. The molecular vertical profiles, the aerosols’ model, and the CO2 continuum contribution were established based on the literature for the different spectral windows. This enabled us to determine the spectral bands, their bandwidth, and the resolving power necessary for our purposes. Along the way, we identified possible improvements and science avenues. Some of them impact the instrument design, such as the need for polarimetric measurements. Others are related to remaining uncertainties in the model and laboratory measurements that will complement the investigation. This has been presented as a poster at the SPIE Optical Engineering + Applications Conference in August 2024 in San Diego, California, United States.
dc.languageeng
dc.titleScientific objectives and instrumental requirements of the infrared spectrometer VenSpec-H onboard EnVision
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeVenus
dc.subject.freeSpectral resolution
dc.subject.freeInfrared radiation
dc.subject.freeMolecules
dc.subject.freeSpectroscopy
dc.subject.freeInfrared spectroscopy
dc.subject.freeAtmospheric modeling
dc.subject.freeClouds
dc.subject.freeSignal to noise ratio
dc.subject.freeEquipment
dc.source.titleJournal of Applied Remote Sensing
dc.source.volume19
dc.source.issue1
dc.source.pageA014525
Orfeo.peerreviewedYes
dc.identifier.doi10.1117/1.JRS.19.014525
dc.identifier.url


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