Study: 000252 Acronym: regcal076 Intensity variation measurements. Flat Fiels data used to determine changes in intensity levels with time. 1) Repeats: 1 2) 1 flat field exposure (1 sec exp), left halves of both ccds (LED on time: 100ms) 3) Time required: 30 seconds 4) Target: None (shutter closed) WARNING: DO NOT run within SAA High DR