Study 000021: 1) Acronym: regcal018 2) Repeats: 1 3) 8 flat field exposures (1 sec exps), full ccd (LED on times: 60,60,80,80,100,100,120,120ms) 4) Time required: 14 mins 5) Target: None (shutter closed) WARNING: DO NOT run within SAA High DR