These are acronyms used by Rocket Breaks and the wider industry, as we move forward into space tourism you might find it useful to reference this document from time to time.

°C . . . . . . . . . . . Degrees Celsius

°F. . . . . . . . . . . . Degrees Fahrenheit

°R . . . . . . . . . . . Degrees Rankine

24/7. . . . . . . . . . 24 Hours/day, 7 days/week

2–D. . . . . . . . . . Two-Dimensional

3C. . . . . . . . . . . Command, Control, and Checkout

3–D. . . . . . . . . . Three-Dimensional

3–DOF . . . . . . . Three-Degrees of Freedom

6-DOF. . . . . . . . Six-Degrees of Freedom

A&E. . . . . . . . . Architectural and Engineering

ACEIT. . . . . . . . Automated Cost-Estimating Integrated Tools

ACES . . . . . . . . Acceptance and Checkout Evaluation System

ACP. . . . . . . . . . Analytical Consistency Plan

ACRN. . . . . . . . Assured Crew Return Vehicle

ACRV. . . . . . . . Assured Crew Return Vehicle

  1. . . . . . . . . . . Analog to Digital

ADBS. . . . . . . . Advanced Docking Berthing System

ADRA. . . . . . . . Atlantic Downrange Recovery Area

AEDC. . . . . . . . Arnold Engineering Development Center

AEG. . . . . . . . . Apollo Entry Guidance

AETB. . . . . . . . Alumina Enhanced Thermal Barrier

AFB. . . . . . . . . Air Force Base

AFE. . . . . . . . . . Aero-assist Flight Experiment

AFPG. . . . . . . . Apollo Final Phase Guidance

AFRSI. . . . . . . . Advanced Flexible Reusable Surface Insulation

AFV . . . . . . . . . Anti-Flood Valve

AIAA. . . . . . . . American Institute of Aeronautics and Astronautics

  1. . . . . . . . . . . Aluminum

ALARA . . . . . . As Low As Reasonably Achievable

AL-Li. . . . . . . . Aluminum-Lithium

ALS. . . . . . . . . . Advanced Launch System

ALTV. . . . . . . . Approach and Landing Test Vehicle

AMS. . . . . . . . . Alpha Magnetic Spectrometer

AMSAA. . . . . . Army Material System Analysis Activity

AOA . . . . . . . . . Analysis of Alternatives

AOD. . . . . . . . . Aircraft Operations Division

APAS . . . . . . . . Androgynous Peripheral Attachment System

APS. . . . . . . . . . Auxiliary Propulsion System

APU . . . . . . . . . Auxiliary Power Unit

APU . . . . . . . . . Auxiliary Propulsion Unit

AR&D. . . . . . . . Automated Rendezvous and Docking

ARC . . . . . . . . . Ames Research Center

ARF . . . . . . . . . Assembly/Remanufacturing Facility

ASE. . . . . . . . . . Airborne Support Equipment

ASI. . . . . . . . . . Augmented Space Igniter

ASTWG . . . . . . Advanced Spaceport Technology Working Group

ASTP. . . . . . . . . Advanced Space Transportation Program

  1. . . . . . . . . . . Alternate Turbopump

ATCO. . . . . . . . Ambient Temperature Catalytic Oxidation

ATCS . . . . . . . . Active Thermal Control System

ATO . . . . . . . . . Abort-To-Orbit

ATP. . . . . . . . . . Authority to Proceed

ATS. . . . . . . . . . Access to Space

ATV . . . . . . . . . Automated Transfer Vehicles

ATV . . . . . . . . . All Terrain Vehicle

  1. . . . . . . . . . . . Billion(s)

BEN . . . . . . . . . Benign

BFO. . . . . . . . . . Blood-Forming Organs

BFS. . . . . . . . . . Backup Flight Software

BGN. . . . . . . . . Benign Failure

BLS. . . . . . . . . . Bureau of Labor Statistics

BMI. . . . . . . . . . Bismaleimide

BOGS. . . . . . . . Blade Outer Gas Seal

BPR. . . . . . . . . . Business Process Reengineering

BRCU. . . . . . . . Booster Remote Control Unit

BSM. . . . . . . . . Booster Separation Motor

Btu. . . . . . . . . . . British Thermal Unit

  1. . . . . . . . . . . . Carbon

C&C. . . . . . . . . Command and Control

C&W. . . . . . . . . Caution and Warning

C.I.. . . . . . . . . . . Confidence Interval

C2H6. . . . . . . . . Propane

C3 . . . . . . . . . . . . Earth Departure Energy

CAD. . . . . . . . . Computer-Aided Design

CaLV. . . . . . . . . Cargo Launch Vehicle

CAM. . . . . . . . . Computer-Aided Manufacturing

CBC . . . . . . . . . Common Booster Core

CBM. . . . . . . . . Common Berthing Mechanism

CBT. . . . . . . . . . Computer-Based Training

CCAFS. . . . . . . Cape Canaveral Air Force Station

CCB . . . . . . . . . Common Core Booster

CCDH. . . . . . . . Command, Control, and Data Handling

CDF. . . . . . . . . . Cumulative Distribution Function

CDR . . . . . . . . . Critical Design Review

CDV . . . . . . . . . Cargo Delivery Vehicle

CE&R. . . . . . . . Concept Exploration and Refinement

CEEF. . . . . . . . . Crew Escape Effectiveness Factor

CER. . . . . . . . . . Cost Estimating Relationships

CEV . . . . . . . . . Crew Exploration Vehicle

CFD. . . . . . . . . . Computational Fluid Dynamics

CFF. . . . . . . . . . Catastrophic Failure Fraction

CFM. . . . . . . . . Cryogenic Fluid Management

CFO. . . . . . . . . . Chief Financial Officer

cg or CG. . . . . . Center of Gravity

cGy-Eq. . . . . . . Centigray Equivalent

CH4. . . . . . . . . . Methane

CHeCS . . . . . . . Crew Health Care System

CHMO . . . . . . . Chief Health and Medical Officer

CIL. . . . . . . . . . Critical Items List

CIR. . . . . . . . . . Combustion Integrated Rack

  1. . . . . . . . . . . Confidence Level

ClF5. . . . . . . . . . Chlorine Pentafloride

CLV. . . . . . . . . . Crew Launch Vehicle

CM . . . . . . . . . . Crew Module

  1. . . . . . . . . . . Centimeters

CMG. . . . . . . . . Control Moment Gyroscope

CMRS. . . . . . . . Carbon Dioxide (CO2) and Moisture Removal System

CO2. . . . . . . . . . Carbon Dioxide

COAS. . . . . . . . Crew Optical Alignment Sight

Comm. . . . . . . . Communication

CONUS. . . . . . . Continental United States

  1. . . . . . . . . . . Change Request

CRAC. . . . . . . . Constant Radius Access Circle

Crit-1. . . . . . . . . Criticality 1

CRV . . . . . . . . . Crew Return Vehicle

CSM. . . . . . . . . Command and Service Module

CTB. . . . . . . . . . Cargo Transfer Bag

CTS. . . . . . . . . . Crew Transportation System

CWI. . . . . . . . . . Combustion Wave Ignition

  1. . . . . . . . . . . Calendar Year

DARE. . . . . . . . Dynamic Abort Risk Evaluator model

DAV . . . . . . . . . Descent/Ascent Vehicle

DBFRSC. . . . . . Dual Preburner Fuel Rich Staged Combustion

DCF. . . . . . . . . . Delayed Catastrophic Failure

DCS. . . . . . . . . . Decompression Sickness

DC–X. . . . . . . . Delta Clipper Experimental Program

DDCmplx. . . . . Design and Development Complexity

DDInher. . . . . . Design and Development Inheritance

DDT&E. . . . . . . Design, Development, Test, and Evaluation

deg. . . . . . . . . . . Degrees

Demo. . . . . . . . . Demonstration

DKR. . . . . . . . . Detra-Kemp-Riddell

DoD. . . . . . . . . . Department of Defense

DoE. . . . . . . . . . Department of Energy

DOF . . . . . . . . . Degrees of Freedom

DoT. . . . . . . . . . Department of Transportation

DPT. . . . . . . . . . Decadel Planning Team

DRM. . . . . . . . . Design Reference Mission

DSN . . . . . . . . . Deep Space Network

DSS. . . . . . . . . . Decelerator System Simulation

  1. . . . . . . . . . . Delta Velocity (i.e., change in velocity)

EAC. . . . . . . . . . Estimates at Completion

EAFB. . . . . . . . Edwards Air Force Base

EAP. . . . . . . . . . Expert Assessment Panel

EAS. . . . . . . . . . Engine Air Start

ECLS. . . . . . . . . Environmental Control and Life Support

ECLSS . . . . . . . Environmental Control and Life Support System

ECU . . . . . . . . . Engine Control Unit

EDL. . . . . . . . . . Entry Descent and Landing

EDLS. . . . . . . . Entry, Descent, and Landing System

EDS. . . . . . . . . . Earth Departure Stage

EDV . . . . . . . . . EELV-Derived Vehicle

EEE. . . . . . . . . . Electrical and Electronic Engineering

EELV. . . . . . . . . Evolved Expendable Launch Vehicle

  1. . . . . . . . . . . Error Factor

EHA. . . . . . . . . Electro-Hydrostatic Actuator

  1. . . . . . . . . . . . Entry Interface

EIRA. . . . . . . . . ESAS Initial Reference Architecture

ELR. . . . . . . . . . Excess Lifetime Risk

ELV. . . . . . . . . . Expendable Launch Vehicle

EMA. . . . . . . . . Electro-Mechanical Actuators

EMU. . . . . . . . . Extra-vehicular Maneuvering/Mobility Unit

  1. . . . . . . . . . . Engine-Out

EOI. . . . . . . . . . Earth-Orbit Insertion

EOR. . . . . . . . . Earth Orbit Rendezvous

ERT. . . . . . . . . . Expedition Readiness Training

ESA. . . . . . . . . . Exploration Systems Architecture

ESAS. . . . . . . . . Exploration Systems Architecture Study

ESD. . . . . . . . . . Event Sequence Diagram

ESMD. . . . . . . . Exploration Systems Mission Directorate

ESRT. . . . . . . . . Exploration Systems Research and Technology

eSSME . . . . . . . Expendable Space Shuttle Main Engine

  1. . . . . . . . . . . External Tank

ETO. . . . . . . . . . Earth-to-Orbit

EtOH. . . . . . . . . Ethanol

EVA. . . . . . . . . . Extra-Vehicular Activity

FAR. . . . . . . . . . Federal Acquisition Regulation

  1. . . . . . . . . . . Flight Computer

FCE. . . . . . . . . . Flight Crew Equipment

FDIR/R. . . . . . . Fault Detection, Isolation, and Recovery/Reconfiguration

FES. . . . . . . . . . Fluid Evaporator System

FEV. . . . . . . . . . Flash Evaporator System

FIR. . . . . . . . . . Fluids Integrated Rack

FIRST. . . . . . . . Flight-Oriented Integrated Reliability and Safety Tool

FIV. . . . . . . . . . Fuel Isolation Valve

Flts . . . . . . . . . . Flights

FLUINT. . . . . . Fluid Integrator

  1. . . . . . . . . . . Failure Mode

FMC. . . . . . . . . Flight Medicine Clinic

FMEA. . . . . . . . Failure Modes and Effects Analysis

FMHR. . . . . . . . Free Molecular Heating Rate

FOM. . . . . . . . . Figure of Merit

FORP . . . . . . . . Fuel-Oxidizer Reaction Product

FRAM. . . . . . . . Flight-Releasable Attachment Mechanism

FRGF. . . . . . . . . Flight-Releasable Grapple Fixture

FRSC. . . . . . . . . Fuel-Rich Staged Combustion

FRSI. . . . . . . . . Flexible Reusable Surface Insulation

  1. . . . . . . . . . . Factor of Safety

FSE. . . . . . . . . . Flight Support Equipment

FSPS. . . . . . . . . Fission Surface Power System

FSS. . . . . . . . . . Fixed Service Structure

  1. . . . . . . . . . . . Feet

ft/s. . . . . . . . . . . Feet Per Second

FTA. . . . . . . . . . Flight Test Article

FTINU . . . . . . . Fault Tolerant Inertial Navigation Unit

FTP. . . . . . . . . . Fuel Turbopump

FTS. . . . . . . . . . Flight Termination System

  1. . . . . . . . . . . Flight Unit
  2. . . . . . . . . . . Fiscal Year
  3. . . . . . . . . . . . Acceleration due to gravity (32 ft/sec)

G&A. . . . . . . . . General and Administrative

g/cm2. . . . . . . . . Grams Per Square Centimeter

GaAs. . . . . . . . . Gallium Arsenide

GCH4. . . . . . . . Gaseous Methane

GCR. . . . . . . . . Galactic Cosmic Ray

GDMS. . . . . . . . Ground Data Management System

GEM. . . . . . . . . Graphite Epoxy Motor

GEO . . . . . . . . . Geosynchronous Earth Orbit

GFE. . . . . . . . . . Government-Furnished Equipment

  1. . . . . . . . . . . Gas Generator

GHe. . . . . . . . . . Gaseous Helium

GLOW. . . . . . . . Gross Liftoff Weight

GN&C. . . . . . . . Guidance, Navigation, and Control

GN2. . . . . . . . . . Gaseous Nitrogen

GOX. . . . . . . . . Gaseous Oxygen

GPS. . . . . . . . . . Global Positioning System

GR&A. . . . . . . . Ground Rules and Assumptions

GRAM. . . . . . . Global Reference Atmospheric Model

GRC . . . . . . . . . Glenn Research Center

GSE. . . . . . . . . . Government-Supplied Equipment

GSE. . . . . . . . . . Ground Support Equipment

GSFC–FAA. . . . Goddard Space Flight Center – Federal Aviation Administration

  1. . . . . . . . . . . Gemini-Titan

GTO . . . . . . . . . Geosynchronous Transfer Orbit

H2. . . . . . . . . . . Hydrogen

H2O. . . . . . . . . . Water

H2O2. . . . . . . . . Hydrogen Peroxide

HAC. . . . . . . . . Heading Alignment Circle

HAN. . . . . . . . . Hydroxyl Ammonium Nitrate

  1. . . . . . . . . . . Hazard Division

HDPE. . . . . . . . High-Density Polyethylene Shielding

He. . . . . . . . . . . Helium

HEO. . . . . . . . . High Earth Orbit

HEX. . . . . . . . . Heat Exchanger

HHFO. . . . . . . . Habitability and Human Factors Office

HIP. . . . . . . . . . Hot Isostatic Press

HLLV. . . . . . . . Heavy-Lift Launch Vehicle

HLR . . . . . . . . . Human Lunar Return

HLV. . . . . . . . . . Heavy-Lift Vehicle

HPFTP . . . . . . . High-Pressure Fuel Turbopump

HPFTP/AT . . . . High-Pressure Fuel Turbopump/Alternate Turbopump

HPOTP/AT. . . . High-Pressure Oxidizer Turbopump/Alternate Turbopump

HPU . . . . . . . . . Hydraulic Power Unit

  1. . . . . . . . . . . Headquarters

HSRT . . . . . . . . Human Systems Research and Technology

HST. . . . . . . . . . Hubble Space Telescope

HTPB. . . . . . . . Hydroxyl Terminated Poly-Butadiene

HTV. . . . . . . . . H-11 Transfer Vehicle

  1. . . . . . . . . . . Habitable Volume

HVAC. . . . . . . . Heating, Ventilating, and Air Conditioning

HYPAS. . . . . . . Hybrid Predictive Aerobraking Scheme

I&T. . . . . . . . . . Integration and Test

I/F. . . . . . . . . . . Interface

IA&C . . . . . . . . Integration, Assembly, and Checkout

ICD. . . . . . . . . . Interface Control Document

ICF . . . . . . . . . . Instantaneous Catastrophic Failure

IDT. . . . . . . . . . Integrated Discipline Team

ILC. . . . . . . . . . In-Line Configuration

ILC. . . . . . . . . . Integrated Logistics Concepts

IMLEO. . . . . . . Initial Mass in Low Earth Orbit

IMP. . . . . . . . . . Integrated Mission Program

IMS. . . . . . . . . . Integrated Master Schedule

IMU . . . . . . . . . Inertial Measuring Unit

  1. . . . . . . . . . . . Inch(es)

INS. . . . . . . . . . Inertial Navigation System

INTROS. . . . . . Integrated Rocket Sizing Program

IOC. . . . . . . . . . Initial Operational Capability

IPAO. . . . . . . . . Independent Program Assessment Office

IPD. . . . . . . . . . Integrated Powerhead Demonstrator

IR . . . . . . . . . . . Infrared

IRD. . . . . . . . . . Interface Requirements Document

  1. . . . . . . . . . . . Interstages

ISHM . . . . . . . . Integrated Systems Health Management

Isp. . . . . . . . . . . Specific Impulse

ISPP. . . . . . . . . . In-Situ Produced Propellant

ISRU. . . . . . . . . In-Situ Resource Utilization

ISS. . . . . . . . . . . International Space Station

  1. . . . . . . . . . . . Information Technology

ITA. . . . . . . . . . Internal Task Agreement

ITAR. . . . . . . . . International Traffic and Arms Regulations

IVA. . . . . . . . . . Intra-Vehicular Activity

IVHM. . . . . . . . Integrated Vehicle Health Management

JOFOC . . . . . . . Justification for Other Than Full and Open Competition

JSC. . . . . . . . . . Johnson Space Center

JWST . . . . . . . . James Webb Space Telescope

  1. . . . . . . . . . . . Thousands
  2. . . . . . . . . . . . Kelvin
  3. . . . . . . . . . . Kilograms
  4. . . . . . . . . . . Kilojoule

klb. . . . . . . . . . . Kilopound

klbf. . . . . . . . . . Thousand Pounds Force

  1. . . . . . . . . . . Kilometers

km/s. . . . . . . . . . Kilometers Per Second

kN. . . . . . . . . . . Kilonewtons

kPa . . . . . . . . . . Kilopascals

KPP. . . . . . . . . . Key Performance Parameters

KSC. . . . . . . . . . Kennedy Space Center

KSLOC. . . . . . . Thousand Software Lines of Codes

kWe. . . . . . . . . . Kilowatts Electric

L/D. . . . . . . . . . Lift-to-Drag (ratio)

LAD. . . . . . . . . Liquid Acquisition Device

LADAR. . . . . . . Laser Detection and Ranging

LAN. . . . . . . . . Local Area Network

LAN. . . . . . . . . Longitude of Ascending Node

LaRC. . . . . . . . . Langley Research Center

LAS. . . . . . . . . . Launch Abort System

  1. . . . . . . . . . . . Pound(s)

lbf. . . . . . . . . . . Pounds Force

lbm . . . . . . . . . . Pounds Mass

  1. . . . . . . . . . . Launch Complex

LCC. . . . . . . . . . Life Cycle Cost

LCF. . . . . . . . . . Low Cycle Fatigue

LCH4. . . . . . . . Liquid Methane

LCVG. . . . . . . . Liquid Cooled Ventilation Garment

LCX . . . . . . . . . Launch Complex X

LEAG. . . . . . . . Lunar Exploration and Analysis Group

LEM. . . . . . . . . Lunar Excursion Module

LEO. . . . . . . . . . Low Earth Orbit

LES. . . . . . . . . . Launch Escape System

LExSWG. . . . . . Lunar Exploration Science Working Group

LH2. . . . . . . . . . Liquid Hydrogen

Li. . . . . . . . . . . . Lithium

LiDAR . . . . . . . Light Detection and Ranging

LIDS. . . . . . . . . Low-Impact Docking System

LiOH. . . . . . . . . Lithium Hydroxide

LLO. . . . . . . . . . Low Lunar Orbit

LLV. . . . . . . . . . Lunar Launch Vehicle

LM . . . . . . . . . . Lunar Module

LNG . . . . . . . . . Liquid Natural Gas

LOC . . . . . . . . . Loss of Crew

LOI. . . . . . . . . . Lunar-Orbit Insertion

LOM. . . . . . . . . Loss of Mission

LOR . . . . . . . . . Lunar Orbit Rendezvous

LOV . . . . . . . . . Loss of Vehicle

LOX . . . . . . . . . Liquid Oxygen

LPFTP/AT. . . . . Low-Pressure Fuel Turbopump/Alternate Turbopump

LPOTP/AT . . . . Low-Pressure Oxidizer Turbopump/Alternate Turbopump

LPR. . . . . . . . . . Libration Point Rendezvous

LPRE. . . . . . . . . Lunar Polar Resource Extractor

LRB. . . . . . . . . Liquid Rocket Booster

LRECM . . . . . . Liquid Rocket Engine Cost Model

LRO. . . . . . . . . . Lunar Reconnaissance Orbiter

LRPS. . . . . . . . . Lunar Radioisotope Power System

LRU. . . . . . . . . . Line Replaceable Unit

LRV. . . . . . . . . . Lunar Roving Vehicle

LSAM. . . . . . . . Lunar Surface Access Module

LSC. . . . . . . . . . Launch Services Contractor

LSR. . . . . . . . . . Lunar Surface Rendezvous

LTMCC. . . . . . . Large-Throat Main Combustion Chamber

LUT. . . . . . . . . . Launch Umbilical Tower

  1. . . . . . . . . . . Launch Vehicle

LVA. . . . . . . . . . Launch Vehicle Architecture

LVHM. . . . . . . . Launch Vehicle Health Management

  1. . . . . . . . . . . . Million(s)
  2. . . . . . . . . . . . Meters

M&O. . . . . . . . . Maintenance and Operations

M&P. . . . . . . . . Material and Processing

m/s. . . . . . . . . . . Meters Per Second

m3 . . . . . . . . . . . Cubic Meters

  1. . . . . . . . . . Mercury-Atlas

MAF. . . . . . . . . Michoud Assembly Facility

mbo. . . . . . . . . . Stage Burnout Mass

MCC. . . . . . . . . Main Combustion Chamber

MCC. . . . . . . . . Mission Control Center

mdry. . . . . . . . . Stage Dry Mass

MDU. . . . . . . . . Master Data Unit

ME . . . . . . . . . . Main Engine

MEA. . . . . . . . . Maintenance Engineering Analysis

MECO. . . . . . . . Main Engine Cutoff

MEIT. . . . . . . . . Multi-Element Integrated Test

MEOP. . . . . . . . Maximum Expected Operating Pressure

MEPAG. . . . . . . Mars Exploration Program Analysis Group

MER. . . . . . . . . Mass Estimating Relationship

MER. . . . . . . . . Mars Exploration Rover

MET. . . . . . . . . Mission Elapsed Time

MeVs. . . . . . . . . Millions of Electron Volts

MFBF. . . . . . . . Mean Flights Between Failure

mgross. . . . . . . . Stage Gross Liftoff Mass

mgross-veh. . . . Vehicle Gross Liftoff Mass

MIS. . . . . . . . . . Management Information System

MIT. . . . . . . . . . Massachusetts Institute of Technology

MLE. . . . . . . . . Mid-deck Locker Equivalent

MLI. . . . . . . . . . Multilayer Insulation

MLP . . . . . . . . . Mobile Launch Platform

MLUT. . . . . . . . Mobile Launch Umbilical Tower

MLV. . . . . . . . . Medium-Lift Vehicle

  1. . . . . . . . . . Mission Mode

MMH . . . . . . . . Monomethyl Hydrazine

MMOD. . . . . . . Micrometeoroid/Orbital Debris

MMSSG. . . . . . Moon-Mars Science Linkage Steering Group

MON-3 . . . . . . . Multiple Oxides of Nitrogen – 3%

MPK. . . . . . . . . Mission Peculiar Kit

MPPF . . . . . . . . Multi-Purpose Processing Facility

MPS . . . . . . . . . Main Propulsion System

MPTA. . . . . . . . Main Propulsion Test Article

  1. . . . . . . . . . Mercury-Redstone
  2. . . . . . . . . . . Microsoft®

MSFC. . . . . . . . Marshall Space Flight Center

MSL . . . . . . . . . Mars Science Laboratory

MSS . . . . . . . . . Mobile Service Structure

mT. . . . . . . . . . . metric ton(s)

MTBF. . . . . . . . Mean Time Between Failure

MTV. . . . . . . . . Mars Transfer Vehicle

MUSS. . . . . . . . Multi-User System and Support

MWe. . . . . . . . . Megawatts Electric

  1. . . . . . . . . . . . Newtons

N/A. . . . . . . . . . Not Applicable

N2. . . . . . . . . . . Nitrogen

N2H4. . . . . . . . . Hydrazine

N2O. . . . . . . . . . Nitrous Oxide

NAFCOM. . . . . NASA and Air Force Cost Model

NAS . . . . . . . . . National Academy of Sciences

NASA. . . . . . . . National Aeronautics and Space Administration

Nav. . . . . . . . . . Navigation

NBL . . . . . . . . . Neutral Buoyancy Laboratory

NCRP. . . . . . . . National Council on Radiation Protection and Measurements

NEO. . . . . . . . . No Engine-Out

NEPA . . . . . . . . National Environmental Policy Act

NExT. . . . . . . . . NASA Exploration Team

NGLT. . . . . . . . Next Generation Launch Technology

NHRP. . . . . . . . Next Hop Resolution Protocol

nmi. . . . . . . . . . nautical mile

NPD . . . . . . . . . NASA Program Directive

NPG . . . . . . . . . NASA Procedure and Guideline

NPOE. . . . . . . . NPO Energomash

NPR. . . . . . . . . . NASA Procedural Requirements

NRO. . . . . . . . . National Reconnaissance Office

NSI. . . . . . . . . . NASA Standard Initiative/Initiator

NTO . . . . . . . . . Nitrogen Tetroxide

NTP. . . . . . . . . . Nuclear Thermal Propulsion

NTS. . . . . . . . . . Nevada Test Sites

NUREG . . . . . . Nuclear Regulatory Commission

O&C. . . . . . . . . Operations and Checkout

O&M. . . . . . . . . Operations and Maintenance

O2. . . . . . . . . . . Oxygen

OBC . . . . . . . . . Other Burden Costs

OCM. . . . . . . . . Operations Cost Model

OExP. . . . . . . . . Office of Exploration

OMB. . . . . . . . . Office of Management and Budget

OML. . . . . . . . . Outer Mold Line

OMS. . . . . . . . . Orbital Maneuvering System

OODA. . . . . . . . Observation, Orientation, Decision, Action

Ops. . . . . . . . . . Operations

ORCA. . . . . . . . Ordnance Remote Control Assembly

ORSC. . . . . . . . Oxygen-Rich Staged Combustion

ORU . . . . . . . . . Orbital Replacement Unit

OSP. . . . . . . . . . Orbital Space Plane

OTP. . . . . . . . . . Oxygen Turbopump

P . . . . . . . . . . . . Pressure Transducer

P(LOC). . . . . . . Probability of Loss of Crew

P(LOM). . . . . . . Probability of Loss of Mission

P/C. . . . . . . . . . . Probe and Cone

  1. . . . . . . . . . . Pad Abort

PAO. . . . . . . . . . Public Affairs Office

PAS. . . . . . . . . . Primary Ascent System

PAS. . . . . . . . . . Payload Attach System

PBAN. . . . . . . . Polybutadiene Acrylonitride

  1. . . . . . . . . . . Plane Change
  2. . . . . . . . . . . Personal Computer

PCBM. . . . . . . . Passive Common Berthing Mechanism

PCM. . . . . . . . . Pulse Code Modulated

PCM. . . . . . . . . Pressurized Cargo Mission

PCU. . . . . . . . . . Power Control Unit

PDR. . . . . . . . . . Preliminary Design Review

PEG. . . . . . . . . . Powered Explicit Guidance

PEM . . . . . . . . . Proton Exchange Membrane

PIC . . . . . . . . . . Pyrotechnic Initiator Controller

PICA. . . . . . . . . Phenolic Impregnated Carbonaceous Ablator

PLF. . . . . . . . . . Payload Fairing

PMA. . . . . . . . . Pressurized Mating Adapter

PMA. . . . . . . . . Primary Mating Adapter

PMAD. . . . . . . . Power Management and Distribution

PMS. . . . . . . . . . Propulsion Management System

PNST. . . . . . . . . Prometheus Nuclear Systems Technology

POD . . . . . . . . . Point of Departure

POST. . . . . . . . . Program to Optimize Simulated Trajectories

ppm. . . . . . . . . . Parts Per Million

PRA. . . . . . . . . . Probabilistic Reliability Assessment

PRC. . . . . . . . . . Productivity Rate Curve

  1. . . . . . . . . . . Primary and Secondary

psf. . . . . . . . . . . pounds per square foot

psi. . . . . . . . . . . Pounds Per Square Inch

psia . . . . . . . . . . Pounds Per Square Inch Absolute

PTA. . . . . . . . . . Prototype Test Article

  1. . . . . . . . . . . Photovoltaic
  2. . . . . . . . . . . Pressurized Volume

PV/RFC. . . . . . . Photovoltaic/Regenerative Fuel Cell

PV/W. . . . . . . . . Formula: (Pressure ∙ Volume)/Weight

  1. . . . . . . . . . . Quantity Distance

QRAS. . . . . . . . Quantitative Risk Assessment System

R&D. . . . . . . . . Research and Development

R&T . . . . . . . . . Research and Technology

RAAN. . . . . . . . Right Ascension of Ascending Node

RCC. . . . . . . . . . Reinforced Carbon-Carbon

RCG . . . . . . . . . Reaction-Cured Glass

RCRS . . . . . . . . Regenerative CO2 Removal System

RCS. . . . . . . . . . Reaction Control System

RDU. . . . . . . . . Remote Data Unit

REID. . . . . . . . . Risk of Exposure-Induced Death

  1. . . . . . . . . . . Radio Frequency

RFC. . . . . . . . . . Regenerative Fuel Cell

RFP. . . . . . . . . . Request for Proposals

RLEP. . . . . . . . Robotic Lunar Exploration Program

RMS. . . . . . . . . Remote Manipulator System

ROM. . . . . . . . . Rough Order Magnitude

ROW. . . . . . . . . Risks, Opportunities, and Watches

  1. . . . . . . . . . . Rocket Propellant

RP1. . . . . . . . . . Kerosene

RPCU. . . . . . . . Remote Power Control Unit

RPL. . . . . . . . . . Rated Power Level

RPSF. . . . . . . . . Rotation Processing and Surge Facility

RRF. . . . . . . . . . Risk Reduction Flight

RRGU. . . . . . . . Redundant Rate Gyro Unit

RSRB. . . . . . . . Reusable Solid Rocket Booster

RSS. . . . . . . . . . Rotating Service Structure

RTV. . . . . . . . . Room Temperature Vulcanized

S&A . . . . . . . . . Safe and Arm

S&MA. . . . . . . Safety and Mission Assurance

SAIC. . . . . . . . . Science Applications International Corporation

SARSAT. . . . . . Search and Rescue Satellite-aided Tracking

SBIR. . . . . . . . . Small Business Innovation Research

SCAPE. . . . . . . Self-Contained Atmospheric Protection Ensembles

SCAWG. . . . . . . Space Communications Architecture Working Group

SCBA. . . . . . . . Strip Collar Bonding Approach

SCE. . . . . . . . . . Station Control Electronics

SDILV. . . . . . . . Shuttle-Derived In-line Launch Vehicle

SDLV. . . . . . . . Shuttle-Derived Launch Vehicle

SDV. . . . . . . . . . Shuttle-Derived Vehicle

SE&I. . . . . . . . . Systems Engineering and Integration

sec. . . . . . . . . . . Second(s)

SECO . . . . . . . . Second Stage Engine Cutoff

SEER–SEM. . . . SEER Software Estimation Model

SEG. . . . . . . . . . Space Shuttle Entry Guidance

SEI. . . . . . . . . . . Space Exploration Initiative

SFT. . . . . . . . . . Single Fault Toerant

SHAB. . . . . . . . Surface Habitat

SiC. . . . . . . . . . . Silicon Carbon

SIGI. . . . . . . . . . Space Integrated GPS Instrumentation

SII. . . . . . . . . . . Saturn Second Stage

SINDA . . . . . . . Systems Improved Numerical Differencing Analyser

SIP. . . . . . . . . . . Strain Isolation Pad

SIRCA. . . . . . . . Silicon Infused Reusable Ceramic Ablator

SIVB. . . . . . . . . Saturn V Third Stage

SLF. . . . . . . . . . Shuttle Landing Facility

SLI. . . . . . . . . . . Space Launch Initiative

SLOC . . . . . . . . Software Lines of Code

  1. . . . . . . . . . . Service Module

SMAC. . . . . . . . Spacecraft Maximum Allowable Concentration

SMD. . . . . . . . . Science Missions Directorate

SOA. . . . . . . . . . State-of-the-Art

SOFI. . . . . . . . . Spray-On Foam Insulation

SOMD. . . . . . . . Space Operations Missions Directorate

SOMS. . . . . . . . Shuttle Orbiter Medical System

SORT . . . . . . . . Simulation and Optimization of Rocket Trajectories

SPA. . . . . . . . . . Spacecraft/Payload Adapter

SPA. . . . . . . . . . South Pole-Aitken (basin on the Moon)

SPACE. . . . . . . . Screening Program for Architecture Capability Evaluation

SPASE. . . . . . . . Standardized Propulsive Skip Entry

SPE. . . . . . . . . . Solar Particle Event

SPF. . . . . . . . . . Single Point Failure

SPS. . . . . . . . . . Service Propulsion System

SPST. . . . . . . . . Space Propulsion Synergy Team

SRB. . . . . . . . . . Solid Rocket Booster

SRM. . . . . . . . . Solid Rocket Motor

SRR. . . . . . . . . . System Requirements Review

SSC. . . . . . . . . . Stennis Space Center

SS–LV. . . . . . . . Single-Stick Launch Vehicle

SSME. . . . . . . . Space Shuttle Main Engine

SSP. . . . . . . . . . Space Shuttle Program

SSPF. . . . . . . . . Space Station Processing Facility

SSRMS. . . . . . . Space Station Remote Manipulator System

SSTO. . . . . . . . . Single-Stage-to-Orbit

STA. . . . . . . . . . Static Test Article

STA. . . . . . . . . . Structural Test Article

STD. . . . . . . . . . Standard

stg. . . . . . . . . . . Stage

STH. . . . . . . . . . System Test Hardware

STO. . . . . . . . . . System Test Operations

STPPO. . . . . . . Space Transportation Programs and Projects Office

STS. . . . . . . . . . Space Transportation System

STTR. . . . . . . . . Small Business Technology Transfer

SUF. . . . . . . . . . Startup Failure

  1. . . . . . . . . . . Space Vehicle

SVMF. . . . . . . . Space Vehicle Mockup Facility

  1. . . . . . . . . . Software

T/W. . . . . . . . . . Thrust-to-Weight (ratio)

TAL. . . . . . . . . . Trans-Atlantic Abort Landing

TBD . . . . . . . . . To Be Determined

TBR. . . . . . . . . . To Be Resolved

  1. . . . . . . . . . . Thermocouple

TCA. . . . . . . . . . Thrust Chamber Assembly

TCS. . . . . . . . . . Thermal Control System

TDRSS. . . . . . . Tracking and Data Relay Satellite System

TEI. . . . . . . . . . Trans-Earth Injection

TEP/ODE . . . . . Thermal Equilibrium Program/One Dimensional Equilibrium

TFU. . . . . . . . . . Theoretical First Unit

TIFF. . . . . . . . . Throttle-Insensitivity Failure Fraction

TLI. . . . . . . . . . Trans-Lunar Injection

TNT . . . . . . . . . Trinitrotoluene, i.e., CH3C6H2(NO2)3

TPS. . . . . . . . . . Thermal Protection System

TPSX. . . . . . . . . Thermal Protection System Expert

TRL. . . . . . . . . . Technology Readiness Level

Tt 1/2. . . . . . . . . Test Type 1, Test Type 2

  1. . . . . . . . . . . Television

TVC. . . . . . . . . . Thrust Vector Control

TVS. . . . . . . . . . Thermal Vacuum Stability

U.S.. . . . . . . . . . United States

UCA . . . . . . . . . Undefinitized Contract Actions

UCM. . . . . . . . . Unpressurized Cargo Mission

UHF . . . . . . . . . Ultrahigh Frequency

URCU. . . . . . . . Upper Stage Remote Control Unit

  1. . . . . . . . . . . Upper Stage

USAF . . . . . . . . United States Air Force

USOS . . . . . . . . United States On-orbit Segment

  1. . . . . . . . . . . Ultra-Violet

VAB . . . . . . . . . Vehicle Assembly Building

VDC. . . . . . . . . Volts Direct Current

VIPA. . . . . . . . . Vehicle Integrated Performance Analysis Team

VITO. . . . . . . . . Vehicle Integration and Test Office

VITT. . . . . . . . . Vehicle Integrated Test Team

  1. . . . . . . . . . . Vacuum Perigee

VPF. . . . . . . . . . Vertical Processing Facility

  1. . . . . . . . . . . Virtual Reality

WAN. . . . . . . . . Wide Area Network

WBS. . . . . . . . . Work Breakdown Structure

WCS. . . . . . . . . Waste Collection System

ΔV. . . . . . . . . . . Delta Velocity, i.e., change in velocity

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