Corrigendum to "The ACOS CO2 retrieval algorithm - Part 1: Description and validation against synthetic observations" published in Atmos. Meas. Tech., 5, 99-121, 2012 - O'Dell, C W; Connor, B; Bösch, H; O'Brien, D; Frankenberg, C; Castano, R; Christi, M; Crisp, D; Elder ing, A; Fisher, B; Gunson, M; McDuffie, J; et al. (Atmospheric measurement techniques, 2012)