THE GOAL OF THIS PROPOSAL IS TO QUANTIFY THE STRENGTH AND RADIAL EXTENT OF THE NON-ROTATIONAL ELECTRIC FIELD AT SATURN. CASSINI DATA HAVE SUGGESTED THIS FIELD IS ORIENTED NEARLY IN THE NOON-TO-MIDNIGHT DIRECTION AND OPERATES IN THE INNER MAGNETOSPHERE. SEVERAL COMPETING THEORIES EXIST ABOUT THE ORIGIN OF THIS FIELD. FURTHERMORE THERE IS DISAGREEMENT ABOUT WHETHER THE FIELD IS PRESENT INWARD OF ABOUT ENCELADUS'S RADIAL DISTANCE (AT APPROXIMATELY FOUR SATURN RADII). AN INVESTIGATION INTO THE BEHAVIOR OF A WIDE RANGE OF PARTICLE TYPES WOULD IN PRINCIPLE CONVERGE ON A SINGLE SET OF PARAMETERS CHARACTERIZING THIS FIELD. .A GLOBAL CONVECTIVE ELECTRIC FIELD WILL ALTER THE CIRCUMPLANETARY DRIFT PATHS OF PLASMA ENERGETIC CHARGED PARTICLES AND CHARGED DUST GRAINS. THEREFORE UNDERSTANDING THE COMPLETE RADIAL EXTENT OF THE FIELD AND ITS STRENGTH AT EACH DISTANCE HAS MAJOR IMPLICATIONS FOR THE FLOW OF CHARGED MATTER IN THE SATURNIAN SYSTEM. THIS IS RELEVANT TO MANY SUBJECTS INCLUDING HOW SATELLITES AND RINGS ARE WEATHERED BY PLASMA AND MORE ENERGETIC CHARGED PARTICLES AND HOW AND WHERE CHARGED DUST GRAINS ORIGINATING FROM ENCELADUS IMPACT THE SATELLITES. GRAINS FROM ENCELADUS BOMBARD THE SURROUNDING BODIES NON-UNIFORMLY LEADING FOR EXAMPLE TO DIFFERENCES IN THE SURFACE BRIGHTNESS. .TO CARRY OUT THIS RESEARCH PROJECT WE WILL ANALYZE DATA FROM CASSINI'S MAGNETOSPHERE IMAGING INSTRUMENT (MIMI). MISSION AVERAGES OF CHARGED PARTICLE INTENSITY PLOTTED VERSUS RADIAL DISTANCE AND LOCAL TIME ORGANIZED AND SEPARATED BY SPECIES ENERGY AND PITCH ANGLE REVEAL AN ASYMMETRY LIKELY CAUSED BY THIS ELECTRIC FIELD. WE WILL USE AN EXISTING MODEL TO EXTRACT THE STRENGTH AND ORIENTATION OF THE ELECTRIC FIELD FROM THE LOCAL TIME PATTERNS. WE PLAN TO USE DATA FROM THE WHOLE MISSION UP TO AND INCLUDING THE RECENT RING-GRAZING ORBITS. THESE LATE ORBITS PROVIDE MORE INSIGHT INTO THE REGION INWARD OF ENCELADUS. WE ALSO PLAN TO LOOK AT THE DATA IN TWO-YEAR SEGMENTS TO EXPLORE LONG-TERM TIME VARIATIONS. THIS PROPOSAL IS RELEVANT TO THE CASSINI DATA ANALYSIS PROGRAM (CDAP). THE PROJECT WOULD ENHANCE THE SCIENTIFIC RETURN OF THE CASSINI MISSION BY ANALYZING AND INTERPRETING DATA FROM ONE OF ITS INSTRUMENTS AND PLACING THE FINDINGS IN THE CONTEXT OF CURRENT RESEARCH ON MAGNETOSPHERIC SATELLITE AND RING SCIENCE. THE PROPOSAL IS NOT PRIMARILY RELEVANT TO OTHER OUTER PLANETS PROGRAMS BECAUSE IT FOCUSES EXCLUSIVELY ON THE ANALYSIS AND INTERPRETATION OF DATA OBTAINED BY CASSINI. .