IN THIS STUDY WE WILL INVESTIGATE FOUR KEY AREAS TO QUANTIFY THE BENEFITS OF A SPACE-BASED PRV MISSION. WE WILL: 1) CONDUCT AN OBSERVATORY CONCEPT TRADE STUDY OF TELESCOPE SIZE OPTICAL DESIGN TARGET SAMPLE SIZE UNIMPEDED CADENCE AND ORBIT (E.G. L2 VS. EARTH-TRAILING) FOR MAXIMIZING THE HZ EARTH ANALOG YIELD PER DOLLAR. 2) MATURE THE INSTRUMENT DESIGN AND EVALUATE THE IMPACT OF THE SPACE ENVIRONMENT THE REMOVAL OF MODAL NOISE BY USING SINGLE MODE FIBERS AND NEXT GENERATION OPTICAL FREQUENCY COMB TECHNOLOGY IN A COMPREHENSIVE PRV ERROR BUDGET. 3) CONDUCT A TRADE STUDY OF THE SPECTROGRAPH WAVELENGTH COVERAGE AND SPECTRAL RESOLUTION IMPACT ON THE EXPECTED EXOPLANET DISCOVERY YIELD PARTICULARLY AS IT PERTAINS TO THE MITIGATION OF STELLAR ACTIVITY SIGNALS WITH DETECTING LINE PROFILE CHANGES AND DEPENDENCE ON SPECTRAL TYPE WITH A LINE-BY-LINE ANALYSIS. 4) SIMULATE THE PRV PRECISION OBTAINABLE BY THE REMOVAL OF THE EARTH S ATMOSPHERE FROM THE ERROR BUDGET IN PARTICULAR THE IMPACT OF IMPERFECT TELLURIC CORRECTION AND THE IMPERFECT COLOR-DEPENDENT BARYCENTRIC CORRECTION THAT OCCUR FOR GROUND-BASED OBSERVATIONS THAT ARE BOTH ELIMINATED BY GOING TO SPACE.