Multispectral imaging the sun in the ultraviolet

Thierry Dudok de Wit (1) , Saïd Moussaoui (2) , Pierre-Olivier Amblard (3) , Jean Aboudarham (4, 5) , Frédéric Auchère (5) , Matthieu Kretzschmar (1) , Jean Lilensten (6)

1 LPCE - Laboratoire de physique et chimie de l'environnement
2 IRCCyN - Institut de Recherche en Communications et en Cybernétique de Nantes
3 GIPSA-SIGMAPHY - GIPSA - Signal Images Physique
4 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
5 IAS - Institut d'astrophysique spatiale
6 LPG - Laboratoire de Planétologie de Grenoble

Solar images in the ultraviolet (UV) are the key to the understanding of the highly dynamic and energetic solar atmosphere. Nowadays, several missions provide simultaneous observations in multiple wavelengths. Such multispectral images have traditionally been used as inputs to physical models. However, as the number of wavelengths steadily increases, empirical approaches such as hyperspectral analysis and blind source separation, become of interest. Two examples are presented, based respectively on spatial and on spectral mixtures of UV data.

Mots clés: Index Terms-solar imaging; UV; multispectral imag- ing; blind source separation

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Thierry Dudok de Wit, Saïd Moussaoui, Pierre-Olivier Amblard, Jean Aboudarham, Frédéric Auchère, et al.. Multispectral imaging the sun in the ultraviolet. WHISPERS 2009 - 1st IEEE Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, Aug 2009, Grenoble, France. pp.CDROM, ⟨10.1109/WHISPERS.2009.5288994⟩. ⟨hal-00626172⟩