| AAAS |
American Association for the Advancement of Science |
| AAS |
American Aeronautical Society |
| AC |
attitude control |
| ACS |
Attitude Control System |
| ACT |
Applied Coherent Technology |
| ADC |
analog-to-digital converter |
| ADCS |
Attitude Determination and Control Subsystem |
| AE |
attitude estimate |
| AFTLV |
auxiliary fuel tank latch valve |
| AGC |
automatic gain control |
| AGI |
Analytical Graphics Inc. |
| AGU |
American Geophysical Union |
| AIAA |
American Institute of Aeronautics and Astronautics |
| ALAS |
advanced liquid axial stage |
| AM |
Atmosphere and Magnetosphere Group |
| AMMOS |
Advanced Multi-mission Operating System |
| AMNH |
American Museum of Natural History |
| AO |
Asia Oceania Geosciences Society |
| AOS |
acquisition of signal |
| API |
application programmers interface |
| ApID |
application ID |
| APL |
Applied Physics Laboratory |
| APX |
alpha, proton, X-ray |
| ASC |
Astrodynamics Specialist Conference |
| ASCE |
Aerospace Specialist Conference and Exhibit |
| ASCII |
American Standard Code for Information Interchange |
| ASI |
Agenzia Spaziale Italiana (Italian Space Agency) |
| ASIC |
application specific integrated circuit |
| ASME |
Aerospace Sciences Meeting and Exhibit |
| ASME |
Aerospace Sciences Meeting and Exhibit |
| AST |
Autonomous Star Tracker |
| ASTM |
American Standards for Testing Materials |
| AT |
auxilary tank |
| ATD |
Advanced Technology Demonstration |
| ATDF |
auxiliary tracking data file |
| ATP |
Acceptance Test Procedure |
| AU |
Astronomical Unit |
| AWG |
American wire gauge |
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| BB |
breadboard |
| BC |
bus controller (1553) |
| BCU |
blockhouse control unit |
| BER |
Bit Error Rate |
| B-frame |
body frame |
| BGO |
bismuth germanate |
| BISD |
Business and Information Services Department |
| BIU |
bus interface unit |
| BM |
bus monitor |
| BNL |
Brookhaven National Laboratories |
| BOA |
beginning of allocation |
| BOL |
beginning of life |
| BOM |
bill of materials |
| BOT |
beginning of track |
| BSP |
board support package |
| BTE |
bench test equipment |
| BVR |
block V receiver |
| BWG |
beam-waveguide |
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| C&DH |
command and data handling |
| CA |
closest approach |
| CAD/CAM |
computer-aided-design/computer-aided-manufacture |
| CAS |
canned activity sequence |
| CASE |
Carnegie Academy for Science Education |
| CBE |
current best estimate |
| CCB |
change control board |
| CCD |
critical command decoder |
| CCD |
charged-coupled device |
| CCE |
Contamination Control Engineer |
| CCGA |
Ceramic Column Grid Array |
| CCGA |
ceramic column grid array |
| CCP |
Contamination Control Plan |
| CCSDS |
Consultative Committee for Space Data Systems |
| CCSSE |
Challenger Center for Space Science Education |
| CDF |
common data format |
| CDR |
Critical Design Review |
| CE |
Contamination Experiment |
| CER |
cost estimating relationship |
| CERES |
Center for Educational Resources |
| CERT |
Computer Emergency Response Team |
| CES |
Component Environmental Specification |
| CFD |
constant fraction discriminator |
| CFDP |
CCSDS file delivery protocol |
| CFE |
Customer Furnished Equipment |
| CG |
center of gravity |
| CGA |
column grid array |
| CGI |
common gateway interface |
| CIW |
Carnegie Institution of Washington |
| CK |
camera kernel (SPICE) |
| CLCW |
command link control word |
| CLTU |
command link transfer unit |
| CLTU |
command link transmssion unit |
| CM |
configuration management |
| CMC |
ceramic matrix composite |
| CMDIF |
command interface |
| CMX |
Cerium oxide doped borosilicate glass |
| COB |
chip on board |
| CoDR |
Conceptual Design Review |
| Co-I |
Co-Investigator |
| COI |
Composite Optics, Inc. |
| COM |
cost of money |
| CONTOUR |
COmet Nucleus TOUR |
| COP |
Command Operation Procedure |
| CORBA |
common object request broker architecture |
| CORE |
Central Operation of Resources for Educators |
| COSPAR |
Committee on Space Research |
| CoTR |
contract technical representative |
| COTS |
commercial-off-the-shelf |
| CP |
center of pressure |
| cPCI |
Compact PCI |
| CPFF |
cost-plus-fixed-fee |
| CPIF |
cost-plus-incentive-fee |
| CPM |
critical path method |
| CPP |
Cleaning Process Procedure |
| CPU |
Central Processing Unit |
| CPV |
common-pressure vessel |
| CR |
Confirmation Review |
| CSC |
computer software component |
| CSCI |
computer software configuration item |
| CSR |
Concept Study Report |
| CTE |
coefficient of thermal expansion |
| CTT |
compatibility test trailer |
| CUC |
CCSDS Unsegmented Time Code |
| CVCM |
collected volatile condensable materials |
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| DAC |
digital to analog converter |
| DC |
Direct Current |
| DC/DC |
direct current to direct current (conversion) |
| DCMC |
Defense Contract Management Command |
| DCN |
drawing change notices |
| DDS |
Delta DeSpin |
| DEI |
Data Exchange Infrastructure (NAVY system) |
| DIP |
dual in-line package |
| DISE |
DPU interface selection electronics |
| DMA |
direct memory access |
| DMR |
Detailed Mission Requirements |
| DOD |
depth of discharge |
| DOSFS |
DOS file system |
| DPCM |
delta pulse code modulation |
| DPCM |
differential pixel code modulation |
| DPS |
Division of Planetary Sciences (AAS) |
| DPU |
Data Processing Unit (Instrument) |
| DSAD |
Digital Solar Attitude Detector |
| DSI |
Decom Systems Inc. |
| DSM |
Deep Space Maneuver |
| DSMS |
Deep Space Mission Service |
| DSN |
Deep Space Network |
| DSS |
digital Sun sensor |
| DTM |
Department of Terrestrial Magnetism |
| DTO |
detailed test objectives |
| DWG |
Data Working Group |
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| E/PO |
Education and Public Outreach |
| E/q |
energy/charge |
| ECL |
emitter coupled logic |
| ECR |
Engineering Change Requests |
| EDAC |
error detection and correction |
| EDF |
engineering, design, and fabrication |
| EDM |
electrical discharge machining |
| EDR |
Engineering Design Review |
| EDU |
engineering development unit |
| EEPROM |
electrically erasable programmable read only memory |
| EGCS |
Experimental GNU Compiler System |
| EGSE |
electrical ground support equipment |
| EGU |
European Geosciences Union |
| EK |
events kernel |
| ELV |
Expendable Launch Vehicle |
| ELVS |
Expendable Launch Vehicle Services |
| EM |
Engineering Model |
| EMC |
electro-magnetic compatibility |
| EMI/RFI |
electromagnetic interference/radio frequency interference |
| EOA |
end of allocation |
| EOL |
end of life |
| EOM |
end of mission |
| EOT |
end of track |
| EPL |
electrical parts list |
| EPPS |
Energetic Particle and Plasma Spectrometer (Instrument) |
| EPS |
Energetic Particle Spectrometer (sensor) |
| EPU |
Event Processing Unit |
| ERCN |
Educators' Resource Center Network |
| ERT |
Earth Received Time |
| ESA |
European Space Agency |
| ESA |
electrostatic analyzer |
| ESD |
electrostatic discharge |
| ESD |
event sequence diagram |
| ESTEC |
European Space Research and Technology Centre (ESA) |
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| FAQ |
frequently asked questions |
| FAR |
Federal Acquisition Regulation |
| FAT |
file allocation table |
| FBA |
fanbeam antenna |
| FDP |
file delivery protocol |
| FEA |
finite element analysis |
| FECF |
Frame Error Control Field |
| FEM |
Finite Element Model |
| FER |
frame error rate |
| FES |
fine error sensor |
| FET |
field-effect transistor |
| FFR |
Fabrication Feasibility Review |
| FFT |
fast Fourier transform |
| FIFO |
first in, first out |
| FIPS |
Fast Imaging Plasma Spectrometer (sensor) |
| FITS |
Flexible Image Transport System |
| FM |
flight model |
| FMEA |
failure mode effects analysis |
| FOP |
Frame Operation Procedure |
| FOT |
Flight Operations Team |
| FOV |
field-of-view |
| FPA |
focal plane assembly |
| FPGA |
field-programmable gate array |
| FPP |
fault protection processor |
| FPP |
floating point processor |
| FPU |
focal plane unit |
| FRU |
frequency reference unit |
| FTA |
fault tree analysis |
| FTE |
full-time equivalent |
| FTP |
full-time equivalent |
| FU |
flight unit |
| FU/FS |
flight unit/flight spare |
| FUV |
far ultraviolet |
| FW |
filter wheel |
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| G&A |
General and Administrative |
| G&C |
guidance and control |
| GC |
Geochemistry Group |
| GDS |
Ground Data System |
| GG |
Geology Group |
| GLAS |
Geoscience Laser Altimeter System |
| GP |
Geophysics Group |
| GPC |
gas proportional counter |
| GRC |
John H. Glenn Research Center at Lewis Field |
| GRNS |
Gamma-Ray and Neutron Spectrometer (Instrument) |
| GRS |
Gamma-Ray Spectrometer |
| GRT |
Ground Received Time |
| GS |
Ground System |
| GSE |
ground support equipment |
| GSE |
Ground System Engineer |
| GSEOS |
Ground Support Equipment Operating System |
| GSFC |
Goddard Space Flight Center |
| GUI |
graphic user interface |
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| H/H |
high/high |
| H/M |
high/medium |
| HBCUs |
Historically Black Colleges and Universities |
| HD |
hard disk |
| HDI |
high density interconnect |
| HEF |
high-efficiency |
| HFET |
heterostructure field-effect transistor |
| HGA |
high-gain antenna |
| HISSC |
High Intensity Solar Simulation Chamber |
| HITL |
hardware-in-the-loop |
| HK |
housekeeping |
| HPGe |
high purity germanium |
| HPLVF |
high pressure latch valve, fuel |
| HPLVO |
high pressure latch valve, oxidizer |
| HR |
heat rejection |
| HRG |
hemispherical resonator gyroscope |
| HRSC |
High-Resolution Stereo Camera |
| HSKP |
housekeeping |
| HTTP |
hypertext transfer protocol |
| HV |
high voltage |
| HVPS |
high voltage power supply |
| HW |
hardware |
| Hz |
hertz |
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| I&T |
integration and test |
| I/F |
Interface |
| I²C |
inter-integrated circuit |
| IA&T |
Integration, Assembly and Test |
| IAA |
International Academy of Astronautics |
| IAC |
International Astronautical Congress (an IAA, IAF meeting) |
| IAF |
International Astronautical Federation |
| IC |
initial calibration |
| ICD |
Interface Control Document |
| ICLCPM |
International Conference on Low-Cost Planetary Missions (an IAA meeting) |
| ICS |
Ion Composition Subsystem |
| IDS |
Instrument Data System |
| IEEE |
Institute of Electrical and Electronic Engineers |
| IEM |
Integrated Electronics Module |
| IFFR |
Informal Fabrication Feasibility Review |
| IGSE |
Instrument Ground Support Equipment |
| IK |
Instrument Parameter Kernel (SPICE) |
| IMEWG |
International Mars Exploration Working Group |
| IMU |
Inertial Measurement Unit |
| IPSDU |
Instrument Power Switching and Distribution Unit |
| IPTF |
interprocessor transfer frame |
| IR |
infrared |
| IR&D |
Independent Research and Development |
| IRD |
Interface Requirements Document |
| IRR |
Integration Readiness Review |
| ISI |
Integral Systems, Incorporated (EPOCH) |
| ISP |
integrated structure and propulsion |
| ISR |
interrupt service routine |
| ITAR |
International Traffic in Arms Regulations |
| ITF |
instrument transfer frame |
| ITO |
indium tin oxide |
| IV |
current (I) voltage (V) |
| IV&V |
independent verification and validation |
| IYP |
in your palm |
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| JGR |
Journal of Geophysical Research (J. Geophys. Res.) |
| JHU |
The Johns Hopkins University |
| JHU/APL |
The Johns Hopkins University Applied Physics Laboratory |
| JPC |
Joint Propulsion Conference (an AIAA meeting) |
| JPL |
Jet Propulsion Laboratory |
| JTAG |
Joint Test Action Group |
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| KB |
kilobytes |
| kbps |
kilobits per second |
| KSC |
Kennedy Space Center |
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| L/C |
load case |
| LAMRC |
lossy adaptive multi-resolution compression |
| LASP |
Laboratory for Atmospheric and Space Physics |
| LBNL |
Lawrence Berkeley National Laboratory |
| LCC |
leadless chip carrier |
| LCCC |
leadless ceramic chip carrier |
| LGA |
low-gain antenna |
| LLNL |
Lawrence Livermore National Laboratory |
| LPB |
Logical Parameter Block |
| LPI |
Lunar and Planetary Institute |
| LPSC |
Lunar and Planetary Science Conference |
| LRR |
Launch Readiness Review |
| LSC |
launch services contractor |
| LSK |
leapseconds kernel (SPICE) |
| LSoC |
low state of charge |
| LUT |
look-up table |
| LV |
launch vehicle |
| LVA |
large velocity adjustment |
| LVDS |
low voltage differential signaling |
| LVPS |
Low Voltage Power Supply |
| LVS |
Low Voltage Sensor |
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| MAG |
Magnetometer (Instrument) |
| MASCS |
Mercury Atmospheric and Surface Composition Spectrometer |
| MCM |
miscellaneous contract materials |
| MCM |
momentum correction maneuver |
| MCP |
microchannel plate |
| MCP |
Monitor and Control Processor (DSN station) |
| MDIS |
Mercury Dual Imaging System (Instrument) |
| MDM |
micro "D" metal |
| MEM |
MESSENGER Education Module |
| MEOP |
maximum expected operating pressure |
| MEPAG |
Mars Exploration Program Analysis Group |
| MERLIN |
Mercury Links |
| MESSENGER |
MErcury Surface, Space ENvironment, GEochemistry, and Ranging |
| MET |
mission elapsed time |
| MEU |
Main Electronics Unit |
| MEX |
Matlab Executable (file format) |
| MG&C |
MESSENGER Guidance and Control |
| MGA |
medium-gain antenna |
| MI |
minority institutions |
| MIA |
Monitor Interface Assembly (DSN station) |
| MIT |
Massachusetts Institute of Technology |
| MIWG |
Mission Integration Working Group |
| MKS |
Mortice Kern Systems (software package for configuration control) |
| MLA |
Mercury Laser Altimeter (Instrument) |
| MLI |
multilayer insulation |
| MLS |
microwave limb sounder |
| MM |
Mission Manager |
| MMIC |
monolithic microwave integrated circuit |
| MOC |
Mission Operations Center |
| MODC |
miscellaneous other direct costs |
| MOI |
Mercury orbit insertion |
| MOPA |
master oscillator power amplifier |
| MOPS |
Mission Operations |
| MOS |
Mission Operations System |
| MOSFET |
metal-oxide semiconductor field-effect transistor |
| MOT |
Mission Operations Team |
| MP |
main processor (in the IEM) |
| MPA |
mirror positioning assembly |
| MPB |
Main Processor Board |
| MPCF |
Mission Operations Center to Payload Command Filter |
| MPG |
Mission Planning Group |
| MRDF |
Material Review Disposition Form |
| MRR |
Mission Readiness Review |
| MSE |
math, science, and engineering |
| MSE |
Mission System Engineer |
| msec |
millisecond |
| MSFC |
Marshall Space Flight Center |
| MSPSP |
Missile System Prelaunch Safety Package |
| MSPSP |
Missile System Prelaunch Safety Program |
| MSSE |
Mission Software System Engineer |
| MSU |
Montana State University |
| MTAC |
Mid-Atlantic Technology Applications Center |
| MTF |
modulation transfer function |
| MTTF |
mean-time-to-failure |
| MU-SPIN |
Minority University-SPace Interdisciplinary Network |
| MUV |
middle ultraviolet |
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| NA |
narrow-angle |
| NAC |
narrow-angle camera |
| NAIF |
Navigation and Ancillary Information Facility |
| NASA |
National Aeronautics and Space Administration |
| NASCOM |
NASA Communications Network |
| NASM |
National Air and Space Museum |
| NASTRAN |
NASA Structural Analysis |
| NLS |
NASA Launch Systems |
| NLT |
not later than |
| NRE |
non-recurring engineering |
| NRTS |
Network Resources and Training Sites |
| NS |
Neutron Spectrometer |
| NSBRI |
National Space Biomedical Research Institute |
| NSES |
National Science Education Standards |
| NSTA |
National Science Teachers Association |
| NT |
New Technology |
| NTE |
not to exceed |
| NTO |
Nitrogen Tetroxide |
| NTS |
National Technical Systems |
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| OCLI |
Optical Coating Laboratories, Inc. |
| OCM |
orbit correction maneuver |
| OCXO |
oven controlled crystal oscillator |
| ODBC |
open database connectivity |
| ODC |
other direct costs |
| ODF |
orbit data file |
| OIM |
orbit insertion maneuver |
| OLS |
Orbital Launch Services |
| OMB |
Office of Management and Budget |
| OMS |
Orbital Maneuvering Subsystem |
| OPAG |
Outer Planets Assessment Group |
| OPNAV |
Optical Navigation |
| OS |
Operating System |
| OSDP |
onboard signal and data processor |
| OSR |
optical solar reflector |
| OSS |
Office of Space Science |
| OWLT |
one-way light time |
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| P/FR |
Problem/Failure Report |
| PA |
Performance Assurance |
| PAA |
phased array antenna |
| PAE |
Performance Assurance Engineer |
| PAF |
payload attach fitting |
| PAIP |
Product Assurance Implementation Plan |
| PAUX |
pressure, auxiliary tank |
| PB |
Parameter Block |
| PCI |
Peripheral Component Interconnect |
| PCI |
peripheral component interconnect |
| PCI |
peripheral component interface |
| PCK |
Planetary Constants Kernel (SPICE) |
| PCM |
phase change material |
| PCM |
power converter module |
| PCS |
probability of command shutdown |
| PCU |
Power Conversion Unit |
| PDR |
Preliminary Design Review |
| PDS |
Planetary Data System |
| PDU |
Power Distribution Unit |
| PEM |
particle environment monitor |
| PEPL |
Preliminary Electrical Part List |
| PER |
Pre-Environmental Review |
| PERT |
Program Evaluation and Review Technique |
| PF |
proto-flight |
| PFR |
problem/failure report |
| Phase B |
20 December 1999-30 June 2001 |
| Phase C/D |
1 July 2001-30 April 2004 |
| Phase E |
1 May 2004-30 September 2011 |
| PI |
Principal Investigator |
| PID |
proportional integral derivative |
| PIDDP |
Planetary Instrument Definition and Development Program |
| PIPE |
planetary image processing environment |
| PLM |
periapse lower maneuver |
| PLR |
Program Level Requirements |
| PM |
Project Manager |
| PMD |
propellant management device |
| PMT |
photomultiplier tube |
| POR |
power on reset |
| POSIX |
portable open systems interface extended |
| ppb |
parts per billion |
| PPCI |
Power PCI = Power Peripheral Componnet Interconnect |
| PPL |
Preferred Parts List |
| ppm |
parts per million |
| PPS |
pulse per second |
| PPSM |
Processor/power supply module |
| PPT |
peak-power tracker |
| PQS |
Program Quality Summary |
| PRA |
probabilistic risk assessment {tc "F.3.8 X-ray Spectrometer (XRS)"} |
| ProcPAR |
Procurement Product Assurance Requirements |
| PROM |
programmable read only memory |
| PS |
Project Scientist |
| PSD |
power spectral density |
| PSE |
power-system electronics |
| PSI |
Pressure Systems, Inc. |
| PSIA |
pounds per square inch absolute |
| PSLA |
project service level agreement |
| PSR |
Pre-Ship Review |
| PSU |
power switching unit |
| PTP |
programmable telemetry processor |
| PWB |
printed wiring board |
| PWM |
pulse-width modulation |
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| QARL |
Quality Assurance Requirement Level |
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| R |
Rayleighs |
| RAM |
random access memory |
| RDC |
resolver to digital converter |
| RE |
recurring engineering |
| REA |
rapid environmental assessment |
| REA |
rocket engine assembly |
| RF |
radio frequency |
| RFI |
Requests for Information |
| RFP |
Request for Proposal |
| RIO |
remote input output |
| RIU |
reasonable order of magnitude |
| RP |
rapid prototype |
| RPN |
reverse polish notation |
| RS |
Radio Science |
| RT |
remote terminal (1553) |
| RTLT |
round trip light time |
| RTW |
Real-Time Workshop |
| RTX |
real time express |
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| S/C |
spacecraft |
| S/W |
software |
| SA |
Solar Array |
| SADA |
Solar Array Drive Actuator |
| SAIC |
Science Applications International Corporation |
| SAS |
Science Analysis System |
| SBLO |
Small Business Liaison Office |
| SBV |
space based visible |
| SCA |
Subcontract Administrator |
| SCCS |
Source Configuration Control System |
| SCET |
spacecraft event time |
| SCLK |
Spacecraft Clock Kernel (SPICE) |
| SCP |
spacecraft control processor |
| SCPS |
Space Communications Protocol Standards |
| SCSE |
Spacecraft System Engineer |
| SCSI |
Small Computer System Interface |
| SD |
Space Department |
| SDB |
Small Disadvantaged Business |
| SDD |
software detailed design |
| SDP |
Software Development Plan |
| SDR |
Subsystem Design Review |
| SDST |
small deep space transponder |
| SEI |
Space Electronics, Incorporated |
| SES |
Scientific & Engineering Solutions |
| SEU |
single-event-upset |
| SFDU |
Standard Formatted Data Unit |
| SI |
Science Instrument |
| SMT |
surface mounted technology |
| SNAPSAT |
Short Notice Accelerated Production SATellite |
| SNR |
signal-to-noise ratio |
| SOC |
Science Operations Center |
| SOC |
state-of-charge (battery) |
| SOW |
Statement of Work |
| SPE |
Static Phase Error |
| SPICE |
spacecraft, planet, instrument, c-matrix, events |
| SPIE |
Society of Photo-Optical Instrumentation Engineers |
| SPK |
Spacecraft and Planets Kernel (SPICE) |
| SPM |
Science Payload Manager |
| SQA |
Software Quality Assurance |
| SQL |
sequential query language |
| SRAM |
static random access memory |
| SRD |
System Requirements Document |
| SRR |
System Requirements Review |
| SRR/CoDR |
System Requirements Review/Conceptual Design Review |
| SRS |
software requirements specification |
| SSC |
Science Steering Committee |
| SSCM |
Small Spacecraft Cost Model |
| SSD |
solid-state detector |
| SSPA |
solid-state power amplifier |
| SSR |
solid-state recorder |
| SSRA |
solid-state recorder assembly |
| ST |
Star Tracker |
| STE |
special test equipment |
| STEREO |
Solar-Terrestrial Relations Observatory |
| STICS |
Supra-Thermal Ion Composition Spectrometer |
| STOL |
Spacecraft Test and Operations Language |
| SW |
software |
| SWG |
Science Working Group |
| SwRI |
Southwest Research Institute, Boulder, Colorado |
| SWSE |
Software System Engineer |
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| TA |
true anomaly |
| TBD |
to be determined |
| TCE |
thermal coefficient of expansion |
| TCM |
trajectory correction maneuver |
| TCP |
transmission control protocol |
| TCXO |
temperature compensated crystal oscillator |
| TDB |
Terrestrial Barycentric Time |
| TDT |
Terrestrial Dynamic Time |
| TEC |
thermo-electric cooler |
| TGA |
thermal gravimetric analysis |
| TIM |
Technical Interchange Meeting |
| TIMED |
Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics |
| TIU |
time interval unit |
| TLC |
target language compiler |
| TLM |
telemetry |
| TLMIF |
telemetry interface |
| TMC |
total mission cost |
| TMDC |
total modified direct cost |
| TML |
total mass loss |
| TMOD |
Telecommunications and Mission Operations Directorate |
| TMR |
triple module redundancy |
| TOF |
time-of-flight |
| TQCM |
temperature controlled quartz crystal microbalance |
| TRIO |
temperature remote input output |
| TRL |
technology readiness level |
| TrueFFS |
True Flash File System |
| TSD |
Technical Services Department |
| TVC |
thrust vector control |
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| UART |
Universal Asynchronous Receiver Transmitter |
| UCB |
University of California, Berkeley |
| UCSB |
University of California, Santa Barbara |
| UM |
University of Michigan |
| US |
United States |
| USN |
Universal Space Net |
| USO |
Ultra-Stable Oscillator |
| UTC |
coordinated universal time |
| UV |
ultraviolet |
| UVSN |
unpowered Venus swingby navigation |
| UVVS |
Ultraviolet-Visible Spectrometer (Instrument) |
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| V&V |
validation and verification |
| V/T |
voltage/temperature |
| VC |
virtual channel |
| VEXAG |
Venus Exploration Analysis Group |
| VHDL |
VHSIC hardware description language |
| VHSIC |
very high speed integrated circuit |
| VIRS |
Visible-Infrared Spectrograph (Instrument) |
| VIS |
visible |
| VLSI |
very large scale integration |
| VMAG |
Vector Magnetometer |
| VME |
Versa Module Eurocard |
| VPT |
manufacturer of DC-DC converters |
| VSE |
Vision for Space Exploration |
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| WA |
wide-angle |
| WAC |
wide-angle camera |
| WAN |
wide area network |
| WBS |
Work Breakdown Structure |
| WCL |
wire connection list |
| WDT |
watch dog timer |
| WOSB |
women-owned small business |
| wrt |
with respect to |
| WW |
wirewrap |
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| XGRS |
X-ray and Gamma-ray Spectrometer |
| XML |
extended markup language |
| XRS |
X-Ray Spectrometer (Instrument) |
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