LET Linear Energy Transfer LEV Lunar Excursion Vehicle LH2 Liquid Hydrogen LLO Low Lunar Orbit LLP Light weight Lattice Panel LMF Lunar Manufacturing Facility LO2 Liquid Oxygen LOX Liquid Oxygen LSS Large Space Structures LSSCD Lunar Storm Shelter Concept Design LTV Lunar Transfer Vehicle MBB Messerschmidt Bolkow Blohm MD AC McDonald Douglas Aircraft Company METS Microwave Energy Transmission in Space MIC Microwave Integrated Circuit MIL STD 155 3B Military Standardized data bus architecture MLI Multi Layer Insulation MLS Microwave Limb Sounder MMC Metal Matrix Composite MMH Mono-Methyl Hydrazine MMIC Monolithic Microwave Integrated Circuits MON Mixed Oxides of Nitrogen MPD Magneto-Plasma Dynamic MS Micro Strip NAS National Academy of Science (USA) NASA National Aeronautics and Space Administration (USA) NASDA National Space Development Agency (Japan) NASP National Aerospace Plane NATO North Atlantic Treaty Organization NERVA Nuclear Engine for Rocket Vehicle Applications NIR Near infrared NLS National Launch System NPV Net Present Value NRC National Research Council (USA) NTM Non-Terrestrial Materials OC Operating Costs OECD Organization for Economic Cooperation and Development OMV Orbital Maneuvering Vehicle ORU Orbital Replaceable Unit OSC Orbital Sciences Corporation OTV Orbital Transfer Vehicle P & W Pratt & Whitney PAA Phased Array Antenna PAM Payload Assist Module PCU Power Conversion Unit PEL Public Emergency Limit PEM Particle Environment Monitor P/F Platform P/L Payload PLSS Portable Life Support System PLV Personnel Launch Vehicle PM Personnel Module POTV Personnel Orbit Transfer Vehicle PPU Power Processing Unit PRC People's Republic of China PV Photovoltaic PV Present Value QAJ Quick Attachment Joints RCS Reaction Control System RAPUNZEL Piggy back System (Russia) RF Radio Frequency RFI Radio Frequency Interference RMF Residual Mode Filters
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