Show simple item record

Influence of scintillation on quality of ozone monitoring by GOMOS

dc.contributor.authorSofieva, V.F.
dc.contributor.authorKan, V.
dc.contributor.authorDalaudier, F.
dc.contributor.authorKyrölä, E.
dc.contributor.authorTamminen, J.
dc.contributor.authorBertaux, J.-L.
dc.contributor.authorHauchecorne, A.
dc.contributor.authorFussen, D.
dc.contributor.authorVanhellemont, F.
dc.date2009
dc.date.accessioned2016-04-05T11:22:54Z
dc.date.available2016-04-05T11:22:54Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3260
dc.descriptionStellar light passing through the Earth atmosphere is affected by refractive effects, which should be taken into account in retrievals from stellar occultation measurements. Scintillation caused by air density irregularities is a nuisance for retrievals of atmospheric composition. In this paper, we consider the influence of scintillation on stellar occultation measurements and on the quality of ozone retrievals from these measurements, based on experience of the GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board the Envisat satellite. In GOMOS retrievals, the scintillation effect is corrected using scintillation measurements by the fast photometer. We present quantitative estimates of the current scintillation correction quality and of the impact of scintillation on ozone retrievals by GOMOS. The analysis has shown that the present scintillation correction efficiently removes the distortion of transmission spectra caused by scintillations, which are generated by anisotropic irregularities of air density. The impact of errors of dilution and anisotropic scintillation correction on the quality of ozone retrievals is negligible. However, the current scintillation correction is not able to remove the wavelength-dependent distortion of transmission spectra caused by isotropic scintillations, which can be present in off-orbital-plane occultations. This distortion may result in ozone retrieval errors of 0.5-t;1.5% at altitudes 20-40 km. This contribution constitutes a significant percentage of the total error for bright stars. The advanced inversion methods that can minimize the influence of scintillation correction error are also discussed.
dc.languageeng
dc.titleInfluence of scintillation on quality of ozone monitoring by GOMOS
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeatmospheric chemistry
dc.subject.freechemical composition
dc.subject.freeEnvisat-1
dc.subject.freeerror analysis
dc.subject.freeozone
dc.subject.freephotometer
dc.subject.freequantitative analysis
dc.source.titleAtmospheric Chemistry and Physics
dc.source.volume9
dc.source.issue23
dc.source.page9197-9207
Orfeo.peerreviewedYes
dc.identifier.scopus2-s2.0-71849093774


Files in this item

Thumbnail
Name:
Sofieva(2009b).pdf
Size:
1.804Mb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record