Planck pre-launch status: HFI ground calibration F. Pajot, P. A. R. Ade, J.-L. Beney, E. Bréelle, D. Broszkiewicz, P. Camus, C. Carabétian, A. Catalano, A. Chardin, M. Charra et al. (64 more) A&A, 520 (2010) A10 Published online: 15 September 2010 DOI: 10.1051/0004-6361/200913203