... Initialize the output event list: create a DAL clone of the input event list: *evlist delete all EXPMAPnn extensions if *withexpmaps *withcombmap: create the dataset for the combined exposure map: *expimageset set the primary image dimensions to the EVENTS table channel space initialize image to zero Complete the STDGTI tables: auxiliaryGti = intersection(*auxgtitables) for each chip: for each valid frame contained in *auxiliaryGti: alignedGti |= gti ( ...