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New multispectrum fitting software used at DLR for analysis of laboratory Fourier-Transform molecular spectra

Loos, Joep und Birk, Manfred und Wagner, Georg (2014) New multispectrum fitting software used at DLR for analysis of laboratory Fourier-Transform molecular spectra. 13th HITRAN Database Conference, 23.-25. Jun. 2014, Cambridge, MA, USA.

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Kurzfassung

A new fitting tool written in IDL for analysis of single or multiple molecular absorption spectra recorded with a Fourier-transform spectrometer will be presented. The software utilizes a microwindow-based line-by-line approach and its capabilities include the choice of numerous different line shape models, from a simple Voigt to more sophisticated models including e.g. speed-dependence, Dicke narrowing or Rosenkranz line mixing. A comfortable interactive mode as well as a fully automatic mode have been implemented including various quality assessment procedures like the monitoring of correlation coeffcients or the supply of useful information e.g. needed for file cuts (single spectrum residuals). Two application examples will be given as illustration of the software's capabilities. First, the results of a speed-dependent analysis of room temperature water vapor spectra in the 1250-1750 cm-1 range are compared to the original results obtained by an analysis based on single spectra fits applying the Voigt procedure. The results of the new approach show significantly reduced residuals and systematically larger broadening parameters. The so far published Voigt broadening parameters are effective parameters being systematically too small since they compensate narrowing. Usually effective Voigt parameters are retrieved from non-opaque lines and should only be used when modelling non-opaque lines. Second, the results of an analysis of air broadened nitrous oxide spectra in the v3 rovibrational band utilizing the pCqSDHC modela including first order line mixing will be presented. Speed dependence of the broadening parameter as well as line mixing have to be considered in order to represent the spectral features down to the 0.1% level.

elib-URL des Eintrags:https://elib.dlr.de/90066/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:New multispectrum fitting software used at DLR for analysis of laboratory Fourier-Transform molecular spectra
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Loos, Joepjoep.loos (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Birk, Manfredmanfred.birk (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wagner, Georggeorg.wagner (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2014
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:line parameter retrieval software, N2O, multispectrum fitting, line shape
Veranstaltungstitel:13th HITRAN Database Conference
Veranstaltungsort:Cambridge, MA, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:23.-25. Jun. 2014
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 (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > Experimentelle Verfahren
Hinterlegt von: Loos, Joep
Hinterlegt am:30 Jul 2014 17:49
Letzte Änderung:31 Jul 2019 19:47

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