For redundancy reasons, the central on-board computer BEE (Back End Electronics) consists of two identical units, each consisting of a power supply unit (PSU) and a data processing unit (DPU).
The power supply unit, which was developed and built by RUAG Space, supplies all instrument units with their own electrical voltages. Especially for the camera unit, high accuracy criteria had to be met to ensure instrumental stability.
The data processing unit was developed and manufactured at IWF. It was particularly important to provide the necessary computing power and storage capacity to obtain the highest possible data quality, yet compromising with the characteristics of the satellite. In addition, the DPU continuously measures the main parameters of the on-board computer and uses its software to thermally control the telescope and instrument.