ANALYSIS OF VAN ALLEN PROBES DATA HAS DEMONSTRATED THAT THE INNER (<6 EARTH RADII) EQUATORIAL TERRESTRIAL MAGNETOSPHERE IS ABUNDANTLY POPULATED WITH KINETIC-SCALE (<AN ION INERTIAL LENGTH) ELECTRIC FIELD STRUCTURES AT RADIAL DISTANCES ASSOCIATED WITH THE OUTER RADIATION BELT AND RING CURRENT [1]. THESE STRUCTURES REPRESENT A NEW PLASMA PHYSICS DISCOVERY IN THIS REGION OF SPACE ENABLED BY THE VAN ALLEN PROBES' INSTRUMENTATION AND ORBIT. STRUCTURE TYPES INCLUDE ELECTRON DOUBLE LAYERS STRONG DOUBLE LAYERS PHASE SPACE HOLES SOLITARY STRUCTURES EMBEDDED IN WHISTLER-MODE WAVES AND KINETIC ALFVEN WAVES. DUE TO THE NOVELTY OF THESE OBSERVATIONS THE RELATIVE ABUNDANCE OF EACH STRUCTURE TYPE AND THE EXTENT TO WHICH EACH STRUCTURE TYPE AFFECTS INNER MAGNETOSPHERIC PLASMA ARE NOT YET UNDERSTOOD.SIMULATIONS AND PRIOR OBSERVATIONS SUGGEST THAT THESE STRUCTURES MAY SIGNIFICANTLY INFLUENCE PLASMA POPULATIONS AND DRIVE PARTICLE ENERGIZATION [2]. IN PARTICULAR THESE STUDIES DEMONSTRATE INSTANCES OF CORRESPONDENCE BETWEEN BIDIRECTIONAL FIELD-ALIGNED ELECTRON PITCH ANGLE DISTRIBUTIONS (PADS) AND KINETIC-SCALE ELECTRIC FIELD STRUCTURES [2]. ANOTHER RECENT STUDY DEMONSTRATED THAT ~90% OF SUCH KINETIC STRUCTURES DATA APPEAR AT OR NEAR SHARP GRADIENTS IN ~10 KEV ELECTRON FLUX [1]. THESE GRADIENTS MARK PLASMA BOUNDARIES SUCH AS INJECTION FRONTS THE INNER PLASMA SHEET EDGE AND THE PLASMAPAUSE. HOWEVER THIS STUDY DID NOT DIFFERENTIATE AMONG KINETIC STRUCTURE TYPES OR PLASMA BOUNDARY TYPES.TO MAKE PROGRESS TOWARD QUANTIFYING THE INFLUENCE OF KINETIC-SCALE ELECTRIC FIELD STRUCTURES ON INNER MAGNETOSPHERIC PLASMA WE PROPOSE TO ANSWER THESE QUESTIONS: (Q1) WHICH KINETIC-SCALE ELECTRIC FIELD STRUCTURES OCCUR AT WHICH PLASMA BOUNDARIES? (Q2) IS THE CORRELATION BETWEEN BIDIRECTIONAL FIELD-ALIGNED ELECTRON PITCH ANGLE DISTRIBUTIONS AND KINETIC-SCALE ELECTRIC FIELD STRUCTURES SUGGESTED BY PRIOR STUDIES STATISTICALLY ROBUST?PLASMA BOUNDARIES WILL BE IDENTIFIED USING AN ALGORITHM DEVELOPED IN [1] BASED ON GRADIENTS IN ~10-100 KEV ELECTRON FLUX AS MEASURED BY THE HOPE AND MAGEIS INSTRUMENTS. PLASMA BOUNDARIES WILL BE CLASSIFIED BY TYPE: PLASMAPAUSE INJECTION FRONT PLASMA SHEET CROSSING OR LOBE CROSSING USING A BROAD RANGE OF PARTICLE FIELDS AND SPACECRAFT EPHEMERIS DATA FROM THE VAN ALLEN PROBES. ELECTRIC AND MAGNETIC WAVE SPECTRAL AND BURST DATA FROM BOTH EFW AND EMFISIS INSTRUMENT SUITES WILL BE USED TO IDENTIFY KINETIC-SCALE ELECTRIC FIELD STRUCTURE TYPES. THIS IS FEASIBLE BECAUSE CLASSES OF KINETIC STRUCTURE UNIQUELY IMPRINT SPECTRAL AND WAVEFORM DATA.Q1 WILL BE ANSWERED BY TYPE-CLASSIFICATION OF HUNDREDS OF PLASMA BOUNDARIES AND THEIR ASSOCIATED KINETIC-SCALE STRUCTURES TO STATISTICALLY DETERMINE WHICH STRUCTURES ARE MOST PROBABLE NEAR EACH BOUNDARY TYPE. Q2 WILL BE ANSWERED BY COMBINING NEARLY FOUR YEARS OF ELECTRON PAD OBSERVATIONS FROM HOPE AND MAGEIS WITH KINETIC-SCALE STRUCTURE OBSERVATIONS TO EVALUATE THE STATISTICAL ROBUSTNESS OF THE CORRELATION SUGGESTED BY CASE STUDIES.UNDERSTANDING KINETIC-SCALE ELECTRIC FIELD WAVES AND STRUCTURES IN THE INNER MAGNETOSPHERE IS AN IMPORTANT AND TIMELY RESEARCH TOPIC THAT DIRECTLY ADDRESSES THE VAN ALLEN PROBES EXTENDED MISSION PRIORITIZED SCIENCE GOAL 1: "PERFECT UNDERSTANDING OF THE RELATIVE ROLES OF LOCAL VERSUS TRANSPORT MECHANISMS OF PARTICLE ACCELERATION AND THE ROLE THAT NONLINEAR MECHANISMS PLAY IN THE ACCELERATION PROCESSES."