ST-ECF Instr ument Science Repor t CE-STIS - 2002- 001 Modelling Charge Coupled Device Readout: Simulation Overview and Early Results P. Bristow & A. Alexov October 2002 Abstract The Calib ra tion enhan cement effort for the Spa ce Telescop e Imaging S p ectrog raph (STIS ) aims to imp r ove data ca librat i on via the app li ca tion of ph ysi c al mod e llin g techniqu es. ... Ideally then, to correct data at the individual pixel level for CTE effects we need a map of the bulk traps across the array. ...