Retrieving the solar EUV spectrum from a reduced set of spectral lines - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Annales Geophysicae Année : 2005

Retrieving the solar EUV spectrum from a reduced set of spectral lines

Résumé

The solar EUV irradiance is a key input for thermospheric and ionospheric models. Difficulties in continuously measuring the calibrated spectrum has prompted the use of various surrogate quantities. Although most proxies correlate quite well with the spectral variability, their use for modelling purposes becomes increasingly unsatisfactory. A different and data-driven approach is considered here, in which the EUV spectrum is reconstructed from a linear combination of a few, calibrated and carefully selected spectral lines. This approach is based on a statistical analysis of the temporal variability of EUV spectra, as recorded by the TIMED satellite. A basic set of lines is extracted, from which the salient features of the spectral variability can be reconstructed. The best results are achieved with a selection of 5 to 8 of these lines. This study focuses on the methodology for selecting these lines, which can also be used for instrument specification and provides new insight into the comparison of solar proxies against the EUV irradiance.
Fichier principal
Vignette du fichier
angeo-23-3055-2005.pdf (775.76 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-00330055 , version 1 (18-06-2008)

Licence

Paternité

Identifiants

Citer

Thierry Dudok de Wit, J. Lilensten, J. Aboudarham, Pierre-Olivier Amblard, Matthieu Kretzschmar. Retrieving the solar EUV spectrum from a reduced set of spectral lines. Annales Geophysicae, 2005, 23 (9), pp.3055-3069. ⟨10.5194/angeo-23-3055-2005⟩. ⟨hal-00330055⟩
247 Consultations
101 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More