Statistics – Computation
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..405..535k&link_type=abstract
Solar Polarization 5: In Honor of Jan Stenflo ASP Conference Series, Vol. 405, proceedings of the conference held 17-21 Septembe
Statistics
Computation
1
Scientific paper
The disk integration process in Doppler imaging and Zeeman-Doppler imaging requires excessive calculations of local Stokes profiles and thus has high computational demands. We present a novel approximation method for the polarized radiative transfer calculation, base on a Principal Component Analysis and Artificial Neural Networks. A set of local line profiles is decomposed into their respective eigenspectra and Artificial Neural Networks are trained, to approximate the non-linear mapping between atmospheric parameters and principal components. In test calculations we demonstrate the reliability and precision of this fast radiative transfer approximation method.
Carroll Andrew T.
Kopf Markus
Strassmeier Klaus G.
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