IGF::OT::IGF THE MISSION OF THE SPACE NETWORK GROUND SEGMENT SUSTAINMENT (SGSS) PROJECT IS TO IMPLEMENT A FLEXIBLE AND EXTENSIBLE GROUND SEGMENT THAT WILL ALLOW THE SPACE NETWORK (SN) TO MAINTAIN HIGH LEVELS OF SERVICE IN THE FUTURE, ACCOMMODATE NEW USERS AND CAPABILITIES, WHILE REDUCING THE EFFORT REQUIRED TO OPERATE AND MAINTAIN THE SYSTEM. THE SGSS PROJECT HAS THE RESPONSIBILITY TO REFURBISH THE EXISTING SN GROUND SEGMENT, WHICH INVOLVES IMPLEMENTING A NEW EXTENSIBLE, FLEXIBLE, AND SCALABLE GROUND TERMINAL ARCHITECTURE. TWO GROUND STATIONS AT THE WHITE SANDS COMPLEX IN WHITE SANDS, NM, AND ONE IN GUAM WILL BE REFURBISHED AND A NEW GROUND STATION IN BLOSSOM POINT, MD WILL BE BUILT. FIRST IMPLEMENTED IN 1983, THE TDRSS HARDWARE AND SOFTWARE AT THESE STATIONS ARE BECOMING INCREASINGLY DIFFICULT AND EXPENSIVE TO SUSTAIN AND MAINTAIN. THIS POSES SUBSTANTIAL RISKS TO THE HIGHLY RELIABLE SERVICE THAT HAS BEEN PROVIDED FOR OVER TWO DECADES TO NASA AND ITS CUSTOMERS. THE EFFORT UNDER THIS TASK ORDER IS AS FOLLOWS: ANALYZE THE EXISTING NASA DATA ON SPACE NETWORK (SN) USER MISSION NEEDS, FUTURE CAPABILITIES DESIRED, TECHNOLOGIES AVAILABLE, AND PREVIOUS NASA SN INTERNAL STUDIES PERFORM A NETWORK AND SYSTEMS ANALYSIS ON THE DESIGN BY THE PRIME/SUBPRIME CONTRACTORS THAT PROVIDES FURTHER INSIGHT INTO THE TECHNICAL ASPECTS OF THE DESIGN ALONG WITH INTEGRATION AND TESTING DIFFICULTIES THAT MAY ARISE. PERFORM PROTOTYPING OF ASPECTS OF THE SGSS NETWORK AND SYSTEM TO MITIGATE RISKS AND ISSUES THAT ARISE FROM IMPLEMENTATION OF THE SGSS DESIGN DEVELOP QUALITATIVE STRENGTHS AND WEAKNESSES OF THE ARCHITECTURE FOR POTENTIAL COST REDUCTION