SYSTEM F6 PROGRAM, PHASE 2 - THE SYSTEM F-6 PROGRAM SEEKS TO DEMONSTRATE THE FEASIBILITY AND BENEFITS OF A SATELLITE ARCHITECTURE WHEREIN THE FUNCTIONALITY OF A TRADITIONAL MONOLITHIC SPACECRAFT IS REPLACED BY A CLUSTER OF WIRELESSLY-INTERCONNECTED SPACECRAFT MODULES. EACH SUCH FRACTIONATED MODULE WOULD CONTRIBUTE A UNIQUE CAPABILITY, E.G., COMPUTATION AND DATA HANDLING, COMMUNICATIONS RELAY, GUIDANCE AND NAVIGATION, PAYLOAD SENSING, ETC., OR IT COULD REPLICATE THE CAPABILITY OF ANOTHER MODULE. THE FRACTIONATED MODULES WOULD FLY IN A LOOSE, PROXIMATE CLUSTER ORBIT OR POTENTIALLY SELF-ASSEMBLE INTO AN AGGREGATE SYSTEM. CRITICAL TO THIS ARCHITECTURE IS A ROBUST, SYSTEM-LEVEL APPROACH TO ENSURING SECURITY, INTEGRITY, AND AVAILABILITY, WHILE IMPLEMENTING AUTHENTICATION AND NON-REPUDIATION. THE MODULES CREATE A VIRTUAL SATELLITE, DELIVERING A COMPARABLE MISSION CAPABILITY TO A MONOLITHIC SPACECRAFT, WHILE SIGNIFICANTLY ENHANCING FUNCTIONAL AND PROGRAMMATIC FLEXIBILITY AND ROBUSTNESS, REDUCING RISK THROUGH THE MISSION LIFE AND SPACECRAFT DEVELOPMENT CYCLE, AND ENABLING INCREMENTAL DEPLOYMENT OF THE SYSTEM. THE SYSTEM F-6 ARCHITECTURE IS DESIGNED TO PROVIDE VALUABLE OPTIONS TO DECISION MAKERS THROUGHOUT THE LIFE CYCLE DEVELOPMENT OF FUTURE SPACE SYSTEMS THAT ARE ABSENT IN PRESENT-DAY MONOLITHIC ARCHITECTURES.