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Helioseismology from SODISM and HMI Intensity Images

Continuum intensity images from PICARD/SODISM and SDO/HMI covering a 209 days period in 2011 are analyzed in order to extract mode parameters for spherical harmonics up to $l=100$. SODISM helioseismology signal is affected by the low orbit of PICARD and by important gaps and CCD persistence effects. SODISM intensity signal has a lower signal to noise ratio and duty cycle than HMI and less modes were successfully fitted over the same period. A comparison of the rotation profiles obtained from both sets of continuum images shows however that the results remain compatible within one standard deviation of HMI formal errors.

preprint2013arXivOpen access
Thierry CorbardDavid SalabertPatrick Boumier
astro-ph.SR
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Thierry CorbardDavid SalabertPatrick Boumier

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