Subsystem Operations Receive commands from command and data Handling subsystem Provide health and status data to cd&h Perform antenna pointing Perform mission sequence operations per stored software sequence autonomously select omni-antenna when spacecraft attitude is lost autonomously detect faults and recover communications using stored software sequence October 29. 2003 Massachusetts Institute of TechnologySubsystem Operations October 29, 2003 Massachusetts Institute of Technology 7 • Receive commands from Command and Data Handling subsystem • Provide health and status data to CD&H • Perform antenna pointing • Perform mission sequence operations per stored software sequence • Autonomously select omni-antenna when spacecraft attitude is lost • Autonomously detect faults and recover communications using stored software sequence