NUSTAR IS A PRICIPAL INVESTIGATOR (PI)-LED SMALL EXPLORER (SMEX) MISSION THAT PERFORMS SURVEYS AND POINTED OBSERVATIONS. THIS ACQUISITION IS IN RESPONSE TO HQ AO NNG07ZDA003O AND EXTENDS THE BRIDGE PHASE B EFFORT FROM MARCH 1, 2008 TO JUNE 30, 2008. DURING THIS PERIOD, THE CONTRACTOR SHALL: 1. MANAGE THE PROPOSED NUSTAR TASKS, PROVIDE COST AND SCHEDULE INFORMATION TO NASA AS REQUIRED; 2. WORK WITH JPL TO DEVELOP THE NUSTAR PROJECT REQUIREMENTS TO BE READY FOR SYSTEM REQUIREMENTS REVIEW (SSR). 3. DESIGN THE FOCAL PLANE ASSEMBLY, PERFORM REQUIRED ANALYSES, IDENTIFY ALL LONG LEAD PARTS, AND INITIATE LONG LEAD PROCUREMENTS AS REQUIRED. 4. DESIGN THE INSTRUMENT ENCLOSURES, SHIELD, AND APERTURE, PERFORM REQUIRED ANALYSES, IDENTIFY ALL LONG LEAD ITEMS, AND INITIATE LONG LEAD PROCUREMENTS AS REQUIRED. 5. COMPLETE THE GLASS PRODUCTION FACILITY, PRODUCE THE NUSTAR GLASSES TO VERIFY THE PRODUCTION CAPABILITY. 6. DEVELOP PROTOTYPES FOR THE OPTICS ASSEMBLY, DESIGN THE OPTICS ASSEMBLY AND THE PRODUCTION FACILITY, AND PERFORM REQUIRED ANALYSIS. 7. COMPLETE THE PRELIMINARY DESIGN OF THE MAST, CANISTER AND INSTRUMENT STRUCTURE, IDENTIFY LONG LEAD PROCUREMENTS. 8. COMPLETE THE SPACECRAFT REQUIREMENTS, PERFORM SYSTEM ENGINEERING ANALYSES, AND CONTINUE THE BASELINE SPACECRAFT DESIGN. 9. COMPLETE THE MOS (MISSION OPERATIONS SYSTEM) REQUIREMENTS AND THE PRELIMINARY MOS PLAN.