Quasi full-disk maps of solar horizontal velocities using SDO/HMI data Th. Roudier, M. Rieutord, J. M. Malherbe, N. Renon, T. Berger, Z. Frank, V. Prat, L. Gizon and M. Švanda A&A, 540 (2012) A88 Published online: 02 April 2012 DOI: 10.1051/0004-6361/201118678