The configuration uses a simple panel-post aluminum honeycomb structure. Kinematic mounts are used to attach the payload to the bus corner posts. There is also significant mounting area available on the bus side-panels to support payload specific boxes.
All units are internally redundant.
The SSRs have a total storage capacity of 137 Gbits and provide a record throughput capability of 540 Mbps from the payload over an RS-422 interface. A separate, redundant X-band downlink transmitter and gimbaled antenna is provided for payload data. The SSR has direct links to the X-band downlink data transmitter which support downlink rates up to 320 Mbps. This enables a full memory dump within a typical eight-minute station pass. The system allows simultaneous command and telemetry operations through redundant transmitters and receivers.