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The Green Propellant Infusion Mission (GPIM) Project is sponsored by the the NASA Space Technology Mission Directorate (STMD) as part of the work conducted by the Technology Demonstration Mission (TDM) Office. The goal of GPIM is to advance the technology readiness level of a green propulsion technology based on the monopropellant AF-M315E via flight demonstration. Ball Aerospace is leading an Industry, NASA and DoD team to execute the GPIM Project. The green propellant propulsion subsystem is being developed and manufactured by Aerojet. Ball Aerospace is providing the spacecraft bus, a Ball Configurable Platform (BCP)-100, to which the green propellant propulsion subsystem payload is integrated. Ball is providing all spacecraft level AI&T activities and manages launch services and flight operations. Enhancements to Ball's BCP-100 flight software are being developed to perform controlled flight operations of the propulsion subsystem as well as measure thruster performance characteristics on orbit. This paper describes the BCP-100 spacecraft, its history and the straight forward modifications needed to accommodate and operate the GPIM propulsion subsystem.Nomenclature ΔV = Delta velocity A-hr = Ampere hour ADCS = Attitude Determination and Control Subsystem AI&T = Assembly, Integration and Test AF = Air Force AFRL = Air Force Research Laboratory APid = Application id ATJ = Advanced Triple Junction BCP = Ball Configurable Platform CADU = Channel Assess Data Unit cm = centimeters CCSDS = Consultative Committee for Space Data Systems C&DH = Command and Data Handling CP_PDU = CCSDS Path Protocol Data Unit Co-I = Co-Investigator dc = direct current 2 DOD = Department of Defense EELV = Evolved Expendable Launch Vehicle ESPA = EELV Secondary Payload Adaptor GPIM = Green Propellant Infusion Mission GRC = Glenn Research Center GSE = Ground Support Equipment HDD = High Density d-sub IAU = Integrated Avionics Unit Id = Identifier IRAD = Internal Research and Development kg = kilogram L = Latch Valve GN 2 = Gaseous Nitrogen km = Kilometer Kbps = Kilobits per second LEO = Low Earth Orbit Mbps = Megabits per second MMSOC = Multi-Mission Satellite Operations Center MSFC = Marshall Space Flight Center N = Newton NASA = National Aeronautics and Space Administration OAP = Orbit Average Power P = Pressure Transducer P s = Probability of Success PI = Principal Investigator PIB = Payload Interface Board PIP = Payload Interface Plate PL = Payload PLUG = Payload User's Guide RCS = Reaction Control Subsystem SDDG = Space Development and Design Group SDTD = Space Development and Test Directorate SERB = Space Experiment Review Board SGLS = Space-Ground Link System SIV = Standard Interface Vehicle SMC = Space and Missles Command SOH = State of Health STMD = Space Technology Mission Directorate STP = Space Test Program SV = Space Vehicle T = Temperature Sensor TDM = Technology Demonstration Mission USAF = United States Air Force V = Volts VCid = Virtual Channel id W = Watt X = X axis Y = Y axis Z = Z axis ZTJ = Next-Generation Advanced Tripl...