OBJECTIVES: WE PROPOSE TO BUILD AND CRITICALLY TEST A TRL6 IN-SITU SPECTROSCOPIC EUROPA EXPLORER (ISEE) A NEXT-GENERATION ULTRA-COMPACT RAMAN SPECTROMETER WITH SUPERIOR PERFORMANCE THAT MEETS THE TOP-LEVEL SCIENTIFIC REQUIREMENTS OF MULTIPLE PLANETARY MISSIONS TO THE INNER AND OUTER SOLAR SYSTEM. OUR MOTIVATION IS TO BUILD A SMALL VERSATILE INSTRUMENT THAT CAN ADDRESS PRIORITY SCIENCE GOALS IN MISSIONS TO SEVERAL TARGETS AND WITH DIFFERENT SPACECRAFT CONFIGURATIONS (ORBITERS FLY-THROUGHS LANDERS ROVERS). ISEE INTEGRATES FOR THE FIRST TIME A DIGITAL MICROMIRROR DEVICE/PHOTOMULTIPLIER ASSEMBLY (DMD/PMT) AND A MICROCHIP DIODE LASER INTO A MINIATURE RAMAN SPECTROMETER THAT ENABLES UNPRECEDENTED MEASUREMENTS: IN-SITU CHEMICAL IDENTIFICATION AND QUANTITATION OF COMPLEX ORGANIC COMPOUNDS INCLUDING PRE-BIOTIC COMPOUNDS (E.G. AMINO ACIDS) BIOMOLECULES (ORGANIC BIOMARKERS INCLUDING PROTEINS LIPIDS AND NUCLEIC ACID POLYMERS) MINERALS/SALTS AND VOLATILES. ISEE ALSO PROVIDES SAMPLE CONTEXT INCLUDING ICE COMPOSITION CRYSTALLINITY AND ICE PHASE DISTRIBUTION. APPROACH: THE OVERARCHING GOAL OF THIS PROJECT IS TO REDUCE RISKS (TECHNICAL SCIENTIFIC OPERATIONAL AND PROGRAMMATIC) FOR DEVELOPMENT DELIVERY AND DEPLOYMENT OF A FUTURE PLANETARY EXPLORATION INSTRUMENT. FOR ANY GIVEN PLANETARY MISSION ISEE WOULD ADDRESS THE FOLLOWING SCIENCE OBJECTIVES: 1. DETECT AND QUANTITATE ORGANIC COMPOUNDS 2. SEARCH FOR SPECIFIC BIOMOLECULES THAT CAN SERVE AS BIOSIGNATURES 3. DETERMINE FINE-SCALE MINERALOGY 4. SEARCH FOR SOURCES OF CHEMICAL ENERGY (E.G. REDOX COUPLES) 5. CHARACTERIZE ICE CRYSTALLINITY AND ICE PHASE DISTRIBUTION. ISEE INFORMS THESE FIVE SCIENCE OBJECTIVES BY PERFORMING HIGH-RESOLUTION HIGH-SENSITIVITY QUANTITATIVE ANALYSES OF SAMPLES VIA AN INNOVATIVE APPROACH TO RAMAN SPECTROSCOPY. RAMAN IS PROBABLY THE MOST POWERFUL TOOL AVAILABLE FOR IN-SITU NON-INVASIVE MOLECULAR AND MINERALOGICAL CHARACTERIZATIONS. BASED ON THE INELASTIC SCATTERING OF LIGHT THE RAMAN TECHNIQUE IDENTIFIES MOLECULAR SPECIES AND THEIR CHEMICAL AND STRUCTURAL NATURE. ISEE CHANGES PARADIGM IN IN-SITU PLANETARY EXPLORATION: IT SIGNIFICANTLY IMPROVES SCIENCE INSTRUMENT MEASUREMENT CAPABILITIES FOR LANDED AND FLY-THROUGH MISSIONS AND HAS POTENTIAL TO BECOME A KEY NEW INSTRUMENT IN NASA S EXPLORATION TOOLBOX THAT CAN REPLACE FLOWN AND TO-BE-FLOWN IN-SITU SENSING TECHNOLOGIES IN FUTURE MISSION OPPORTUNITIES RELEVANCE: OUR INSTRUMENT SIGNIFICANTLY IMPROVES INSTRUMENT MEASUREMENT CAPABILITIES FOR PLANETARY SCIENCE MISSIONS SUCH AS DISCOVERY NEW FRONTIERS MARS EXPLORATION AND OTHER PLANETARY PROGRAMS. IT HAS POTENTIAL TO BECOME A CRITICAL NEW INSTRUMENT IN NASA S EXPLORATION TOOLBOX THAT CAN REPLACE ALREADY-FLOWN IN-SITU SENSING TECHNOLOGIES IN FUTURE MISSION OPPORTUNITIES. ISEE WILL ENABLE IN-SITU CHEMICAL CLASSIFICATION AND QUANTITATION OF COMPLEX ORGANIC COMPOUNDS MINERALS/ICES AND VOLATILES. THEREFORE ISEE WILL ENABLE MEASUREMENTS RESPONSIVE TO THREE OF THE FIVE SCIENCE OBJECTIVES OF THE SMD S PSD AS STATED IN THE NASA SCIENCE PLAN: [2] UNDERSTAND HOW THE SUN S FAMILY OF PLANETS SATELLITES AND MINOR BODIES ORIGINATED AND EVOLVED [3] UNDERSTAND THE PROCESSES THAT DETERMINE THE HISTORY AND FUTURE OF HABITABILITY OF ENVIRONMENTS ON MARS AND OTHER SOLAR SYSTEM BODIES [4] UNDERSTAND THE ORIGIN AND EVOLUTION OF EARTH LIFE AND THE BIOSPHERE TO DETERMINE IF THERE IS OR EVER HAS BEEN LIFE ELSEWHERE IN THE UNIVERSE. SPECIFICALLY ISEE WILL ENABLE ALL THREE INVESTIGATIONS REQUIRED TO UNDERSTAND THE HABITABILITY OF EUROPA S OCEAN THROUGH COMPOSITION AND CHEMISTRY THE PRIORITY OBJECTIVE OF THE PROPOSED EUROPA LANDER CONCEPT AS DEVELOPED BY A NASA-COMMISSIONED SCIENCE DEFINITION TEAM.