The raw data consists of two parts:
 1. 'frames_1'
 - total dose is distributed equally per each tilt image
 - gain reference file: SuperCDSRef_A_000_0.0.dm4
 
 2. 'frames_2'
 - zero-tilt image has a higher dose than the other tilt images 
 - gain reference file: SuperCDSRef_ts_051_000_-0.0.dm4
 
 For details on dose please refer to the corresponding mdoc files.