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.
@article{arxiv.1307.8372,
title = {Helioseismology from SODISM and HMI Intensity Images},
author = {Thierry Corbard and David Salabert and Patrick Boumier},
journal= {arXiv preprint arXiv:1307.8372},
year = {2014}
}
Comments
4 pages, 3 figures, submitted to Conference Series of Astronomical Society of the Pacific, NSO WorkshopNSO Workshop #27 Fifty Years of Seismology of the Sun and Stars