Characterization of a dense aperture array for radio astronomy S. A. Torchinsky, A. O. H. Olofsson, B. Censier, A. Karastergiou, M. Serylak, P. Picard, P. Renaud and C. Taffoureau A&A, 589 (2016) A77 Published online: 15 April 2016 DOI: 10.1051/0004-6361/201526706