AbstractGOMOS is a stellar occultation instrument onboard ENVISAT. It has already measured several hundreds of thousands occultations since March 2002. In some circumstances, the obliqueness of the star setting causes the remote sounding of possible horizontal turbulence that cannot be adequately corrected by using the fast photometer signals, leading to the presence of residual scintillation in the atmospheric transmittance. We investigate the mechanism that produces this spurious signal that may cause the retrieval of wavy constituent profiles. A special algorithm of vertical autoregressive smoothing (VAS) is proposed that takes into account the physical correlation between adjacent measurements at different tangent altitudes. A regularization parameter of the method may be optimized on basis of the minimal correlation between the residuals as prescribed by the Durbin–Watson statistics. The improvements obtained in the retrieval of both O3 and NO2 number density profiles is presented and discussed with respect to the results of the official data processing model.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Autoregressive smoothing of GOMOS transmittances


    Beteiligte:
    Fussen, D. (Autor:in) / Vanhellemont, F. (Autor:in) / Bingen, C. (Autor:in) / Kyrölä, B. (Autor:in) / Tamminen, J. (Autor:in) / Sofieva, V. (Autor:in) / Hassinen, S. (Autor:in) / Seppälä, A. (Autor:in) / Verronen, P.T. (Autor:in) / Bertaux, J.L. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 36 , 5 ; 899-905


    Erscheinungsdatum :

    2005-04-02


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Autoregressive smoothing of GOMOS transmittances

    Fussen, D. | Online Contents | 2005


    Autoregressive smoothing of GOMOS transmittances

    Fussen, D. / Vanhellemont, F. / Bingen, C. et al. | British Library Conference Proceedings | 2005


    GOMOS Instrument Pointing Control Software

    Holsti, N. / Pastila, T. / Eurospace | British Library Conference Proceedings | 1997


    GOMOS on Envisat: an overview

    Kyrölä, E. / Tamminen, J. / Leppelmeier, G.W. et al. | Elsevier | 2003


    First results on GOMOS-ENVISAT

    Bertaux, J.L. | Online Contents | 2004