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Multispectrum fit of non-Voigt lineshape in the H2O v2 band

Loos, Joep und Birk , Manfred und Wagner, Georg und Hase, Frank und Dubravica, Darko und Palm, Mathias und Sadeghi, Alireza (2013) Multispectrum fit of non-Voigt lineshape in the H2O v2 band. In: 23rd Colloquium on High Resolution Molecular Spectroscopy. HRMS 2013, 25.-30. Aug. 2013, Budapest, Ungarn.

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Kurzfassung

A new fitting tool for analysis of multiple molecular absorption spectra utilizing a microwindow-based line-by-lineapproach has been developed. Its capabilities include the choice of numerous different line shape models, from a simple Voigt to more sophisticated models like a speed-dependent Galatry including line-mixing. A comfortable manual mode as well as a fully automatic mode have been implemented including various quality assessment procedures like the monitoring of correlation coefficients or the supply of useful information e.g. needed for file cuts (single spectrum residuals). As a first application the new tool is used to re-analyze water vapor absorption spectra in the 1250-1750 cm range. The measurements include pure water as well as water/air-mixture measurements and cover a wide range of column densities. The total air pressure and partial pressure ranges were 50-1000 mb and 0.001-5 mb, respectively. Whereas the original analysis was based on single spectrum fits applying the Voigt procedure, in the present multispectrum fit the speed-dependent Voigt lineshape was used. The advantages of a multispectral analyis approach as well as the need for consideration of narrowing effects is illustrated by the presentation of differences in residuals as well as resulting line parameters for selected transitions. As indicated in opaque as well as non opaque lines could be fitted with the speed-dependent Voigt while the pure Voigt yields to narrow opaque lines.

Dokumentart:Konferenzbeitrag (Poster)
Titel:Multispectrum fit of non-Voigt lineshape in the H2O v2 band
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Loos, Joepjoep.loos@dlr.de
Birk , Manfred manfred.birk@dlr.de
Wagner, Georg georg.wagner@dlr.de
Hase, FrankKIT
Dubravica, DarkoKIT
Palm, MathiasUni Bremen, IUP
Sadeghi, AlirezaUni bremen, IUP
Datum:August 2013
Erschienen in:23rd Colloquium on High Resolution Molecular Spectroscopy
Referierte Publikation:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:multispectrum fit water vapour infrared absorption lineshape
Veranstaltungstitel:HRMS 2013
Veranstaltungsort:Budapest, Ungarn
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:25.-30. Aug. 2013
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > Experimentelle Verfahren
Hinterlegt von: Joep Loos
Hinterlegt am:02 Okt 2013 17:04
Letzte Änderung:08 Mai 2014 23:16

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