The data handling system is the central component onboard a satellite responsible for interpretation and distribution of telecommands received from ground and collection of telemetry subsequently sent to ground.
Context Diagram
For the OBOSS-III product, the context of the data handling system is perceived as shown above.
The Data Handling System Interfaces to the ground control center through a Communications (COM) subsystem.
At the other side, a range of onboard subsystems are situated on an onboard bus. All telecommands to these and telemetry from these go through the data handling system.
The following documents define the requirements to be fulfilled by the OBOSS-III product as well as the reuse process applicable to it.
OBOSS-III Manual for Reuse: Guidance to the adaptation process in which a mission specific data handling software system is produced based on the OBOSS-III product.