Electrically, the spacecraft is configured in four major functional areas:

• Power-supply subsystem, including a pyrotechnics unit
• On-board data-handling subsystem
• Attitude and orbit control and measurement subsystem
• Telecommunications subsystem.

Dedicated, physically separated and carefully shielded harnesses interconnect the various subsystem and payload units. The payload includes a separate experiment interconnection harness.

	Telecoms
	Guidance and navigation