THE SOUTHWEST RESEARCH INSTITUTE (SWRI) IN COLLABORATION WITH NASA S JET PROPULSION LABORATORY (JPL) AND THE UNIVERSITY OF COLORADO S LABORATORY FOR ATMOSPHERIC AND SPACE PHYSICS (CU/LASP) IS PLEASED SUBMIT A PROPOSAL TITLED JUPITER MAGNETOSPHERIC BOUNDARY EXPLORER (JUMPER) . JUMPER IS A JUPITER ORBITING SMALLSAT CONCEPT TO EXPLORE THE PLANET S MAGNETOSPHERIC BOUNDARIES AND IMAGE ITS ENERGETIC NEUTRAL ATOM (ENA) EMISSIONS. ITS SCIENCE OBJECTIVES FOCUS ON HOW THE SOLAR WIND INTERACTS WITH JUPITER S MAGNETOSPHERE AND THE CONTRIBUTION OF ENERGETIC NEUTRAL ATOMS (ENAS) TO MASS LOSS FROM THE JOVIAN SPACE ENVIRONMENT. THESE OBJECTIVES WILL BE MET WITH A SCIENCE PAYLOAD CONSISTING OF TWO ION SENSORS A MAGNETOMETER AND AN ENA IMAGER. MEASUREMENTS FROM THESE INSTRUMENTS WILL COMPLEMENT SIMULTANEOUS OBSERVATIONS OF JUPITER S MAGNETOSPHERE FROM A PRIMARY SPACECRAFT (E.G. EUROPA MISSION JUICE IO OBSERVER) PROVIDING A MULTI-POINT PLATFORM FROM WHICH TO STUDY THE DYNAMICS OF THIS SYSTEM. THE SCIENCE OBJECTIVES ARE RESPONSIVE TO AT LEAST ONE OF FIVE SCIENCE GOALS OF NASA S PLANETARY SCIENCE DIVISION (PSD) ADVANCE THE UNDERSTANDING OF HOW THE CHEMICAL AND PHYSICAL PROCESSES IN OUR SOLAR SYSTEM OPERATE INTERACT AND EVOLVE AS DEFINED IN NASA S 2014 SCIENCE PLAN. JUMPER S SCIENCE OBJECTIVES DRIVE SEVERAL TOP-LEVEL REQUIREMENTS ON MISSION DESIGN. THE MOST IMPORTANT IS AN ORBIT THAT INCLUDES SEVERAL PASSES THROUGH JUPITER S BOW SHOCK AND MAGNETOPAUSE ON THE DAYSIDE OF JUPITER. MISSION DESIGN IS ALSO CONSTRAINED BY THE NECESSITY TO RIDE SHARE ON A PRIMARY VEHICLE AT LEAST UNTIL AFTER JUPITER ORBIT INSERTION. OUR MISSION STUDY WILL PROCEED FROM THE ASSUMPTION THAT JUMPER WILL BE CARRIED ONBOARD NASA S EUROPA MISSION ALLOWING FOR REALISTIC MISSION CONSTRAINTS TYPICAL OF JUPITER ORBITER MISSIONS TO BE USED. THE JUMPER SPACECRAFT DESIGN DERIVES HERITAGE FROM SMALLSATS DEVELOPED FOR THE SWRI-LED CYCLONE GLOBAL NAVIGATION SATELLITE SYSTEM (CYGNSS) MISSION. IT CONSISTS OF AN EVOLVED EXPENDABLE LAUNCH VEHICLE SECONDARY PAYLOAD ADAPTER (ESPA) COMPATIBLE FRAME SUPPORTING FOUR DOUBLE-DEPLOYED SOLAR ARRAY PANELS ESPA RING INTERCONNECTIONS FOUR SCIENCE INSTRUMENTS AND A RADIATION VAULT TO HOUSE THE SPACECRAFT AVIONICS AND PAYLOAD SUBSYSTEM ELECTRONICS. JUMPER USES ITS PERIJOVE PERIODS TO TRANSMIT DATA TO THE PRIMARY SPACECRAFT AND EXECUTE RANGING ACTIVITIES. IT WILL DE-ORBIT INTO JUPITER AT END OF MISSION. WHILE OUR PROPOSED MISSION FEASIBILITY STUDY TARGET S JUPITER THIS CONCEPT CAN BE APPLIED WITH MODIFICATIONS TO ANY PLANETARY SYSTEM PREFERABLY ONE WHERE THERE S AN INTERACTION BETWEEN THE SOLAR WIND AND THE PLANET S INTRINSIC OR INDUCED MAGNETIC FIELD.