Download abbreviations and acronyms

EGNOS PROJECT
ABBREVIATIONS AND ACRONYMS
A
A
AAIM
ABS
AC
AD
ACI
AD/R
ADD
ADP
AENA
AES
AFCL
AHRS
AIR
AIV
AIVP
AOC
AOR
AOR-E
AOR-W
AP
APV
ARINC
ARTEMIS
ARTES
ASE
ASQF
ASQFRD
AT
ATC
ATM
ATS
ATSP
AWOP
31/01/2002
Analysis
Aircraft Autonomous Integrity Monitoring
Anti Blocking System
Address Circular
Applicable Document
Action Item Clarification
Architectural Design Review
Architectural Design Document
Acceptance Data Package
Aeropuertos Espa oles y Navegación Aérea (Spain)
Analysis & Evaluation Segment
Air Force Cambridge research Laboratory
Altitude Heading Reference System
Inspection Aircraft & Independent Positioning
Assembly, Integration and Verification
Assembly, Integration and Verification Plan
Advance Operational Capability
Atlantic Ocean Region
AOR Est
Atlantic Ocean Region-West (INMARSAT III satellite)
Auto Pilot
Approach Operations with Vertical Guidance
Aeronautical Radio, INC
Advanced Relay and Technology Mission Satellite
Advanced Research in TElecommunication Systems
Agence Spatiale Europeenne
Application Specific Qualification Facility
ASQF Requirements Document
Acceptance Testing
Air Traffic Control
Air Traffic Management or
Asynchronous Transfer Mode
Air Traffic Services
ATS Providers
All Weather Operations Panel
1
B
Baro
BER
BIH
BIPM
BITE
BPF
Bps
BPSK
BSDR
BSDR-C
BSSC
BW
Barometric altitude
Bit Error Rate
Bureau International de l’Heure
Bureau International des Poids et Mesures
Built In Test Equipment
Band Pass Filter
Bit per second
Bipolar Phase Shift Key
Baseline System Design Review
Consolidated BSDR
Board for Software Standardization & Control
Band Width
C
C
C&M
C/A
C1
C2
CAA
CAASD
CADM
CAT-1
CAT-2
CC
CCB
CCF
CCI
CCITT
CCN
CDI
CDMA
CDR
CE
CEU
CFI
CHA
CI
CIDL
CIL
31/01/2002
Compliant
Control & Monitoring
Coarse Acquisition
C-band uplink frequency (C1 = 6,4 GHz)
C-band downlink frequency (C2 = 3,6 GHz)
Civil Aviation Authority
Centre for Advanced Aviation System Development
Configuration And Data Management
Category 1 Precision Approach Phase of Flight
Category 2 Precision Approach Phase of Flight
Configuration Control or
Core Computer
Change Configuration Board or
Configuration Control Board
Central Control Facility
Communications Control Interface
Comite Consultatif International Telegraphique et
Telephonique ou
International Telephone and Telegraph Consultative
Committee
Contract Change Notice
Course Deviation Indicator
Code Division Multiple Access
Critical Design Review
Communication Equipment
Commission of the European Union
Customer Furnished Item
Channel of High Accuracy
Configuration Item
Configuration Items Data List
Critical Items List or Configuration Items List
2
CIO
CL
CM
CMO
CMP
CMT
CN
CNES
CNMS
CNS
CO
COC
COQ
COS
COTS
CPF
CPU
CR
CRB
CRC
CRD
CSA
CSAR
CSI
CSU
CW
Conventional International Origin
Client representative
Compliant Multiple or
Configuration Manager or
Configuration Management
Configuration Management Office
Configuration Management Plan
Centre de Mission et Traitement (Euridis)
or Commissioning and Maintenance Terminal
Change Notice
Centre National d’Etudes Spatiales
Communication Network Management System
Communications Navigation & Surveillance
Change Order
Certification Of Conformance
Certification of Qualification
Continuity Of Service
Commercial Off The Shelf
Central Processing Facility
Central Processing Unit
Change Request
Change Review Board
Cyclic Redundancy Check
Certification Requirements Document
Channel of Standard Accuracy
Configuration Status Accounting Report
Containment Surface Incident
Channel Service Unit
Continuous Wave
D
D
DAL
DAT
DB
DCN
DCU
DD
DD/R
DDD
DDKP
DFS
DGAC
DGPS
DH
DIL
DJF
31/01/2002
Demonstration
Development Assurance level
Digital Audio Tape
Data Base
Document Change Notice
Display & Control Unit
Detailed Design
DD Review
DD Document
DD Key Point
Deutsche Flugsicherung GmbH (D)
Direction Generale Aviation Civile (F)
Differential GPS
Decision Height
Deliverable Items List
Design Justification File
3
DLL
DLR
DMA
DME
DoC
DOD
DOP
DOT
DPU
DR
DRACAS
DRAIM
DRD
DRL
DRMS
DRU
DSPU
DSS
DSU
DVP
DVPRD
Delay Lock Loop
Deutsche forschungsanstalt fur Luft – und Raumfahrt e.v.
Direct Memory Access
Distance Measuring Equipment
Depth of Coverage
Department Of Defence (US)
Dilution Of Precision
Department Of Transport
Data Processing Unit
Design Review
Data Recording Analysis and Corrective Action System
Differential RAIM
Document Requirements Description
Documentation Requirements List
Distance Root Mean Square
Data Replaceable Unit
Digital Signal Processing Unit
Design Simulation Segment
Data Service Unit
Development Verification Platform Platform
DVP Requirements Document
E
ECAC
ECDIS
ECEF
ECO
ECP
ECR
ECRB
ECS
ECSS
EDP
EEE
EETES
EGN
EGNOS
EIDP
EIRP
EL
EMC
EMP
ENAV
ENMA
ENMC
ENT
EOIG
31/01/2002
European Civil Aviation Conference
Electronic Chart Display and Information System
Earth Centered Earth Fixed
Engineering Change Order
Engineering Change Proposal
Engineering Change Request
External Change Review Board
Electronic Chart System
European Co-operation for Space Standardisation
EGNOS ILD Documentation Plan
Electrical Electronic Electromechanical
EGNOS End To End Simulation
EGNOS
European Geostationary Navigation Overlay Service
End Item Data Package
Equivalent Isotropic Radiated Power
Elevation
Electromagnetic Compatibility
EGNOS Maintenance Plan
Ente Nationale di Assistenze al Volo (Italy)
EGNOS Network Management Application
EGNOS Network Monitoring & Control
EGNOS Network Time
EGNOS Operators and Infrastructure Group
4
EPO
EPROM
EPUE
EPUERD
ERAM
ERNP
ESA
ESA-CST
ESA HQ
ESDV
ESM
ESNP
ESRRD
ESSF
ESTB
ESTEC
ESVS
ETFM
ETG
ETMS
ETS
EVP
EUROCAE
EWAN
EGNOS Project Office
Erasable and Programmable Read Memory Only
EGNOS Prototype User Equipment
EPUE Requirements Document
EGNOS Requirements Allocation Matrix
European RadioNavigation Plan
European Space Agency
ESA Centre Spatial de Toulouse
ESA Headquarters Paris
Early System Demonstration & Verification (activities)
Electronics Support Measures
European Satellite Navigation Programme
EGNOS Standard Receiver Document
EGNOS System Simulation Facility
EGNOS System Test Bed
European Space Research and Technology Centre
(Noordwijk)
EGNOS Service Volume Simulator
Early Trials Final Meeting
European Tripartite Group
EGNOS Transport Management System
Early Test System
EGNOS Verification Plan
European Organisation for Civil Aviation Equipment
EGNOS Wide Area Network
F
FAA
FAF
FANS
FDDI
FDE
FDI
FDIR
FDMA
FDS
FEC
FECP
FEE
FFT
FIR
FIVP
FL
FMAP
FMECA
FMS
FOC
FOCTF
31/01/2002
Federal Aviation Administration
Final Approach Fix
Future Air Navigation Systems
Fibber Distributed Data Interface
Failure Detection and Exclusion
Failure Detection and Isolation
Failure Detection , Isolation and Recovery
Frequency Division Multiple Access
Flight Director System
Forward Error Correction
Front End Communication Processor
(EWAN) Front End Equipment
Fast Fourier Transform
Flight Information Region
Factory Integration Validation Plan
Flight Level
Failure during Miss Approach Procedure
Failure Mode Effects & Criticality Analysis
Flight Management System
Full Operational Capability
FOC Transition File
5
FQP
FQR
FR
FTA
FTE
FTRR
Factory Qualification Plan
Factory Qualification Review
Frame Relay
Fault Tree Analysis
Flight Technical Error
Factory Test Readiness Review
G
G/S
GBA
GEO
GIC
GIVD
GIVE
GLONASS
GMDSS
GNOS
GNSS
GNSS-1
GNSS-P
GPRS
GPS
GRAIM
GRS
GRS-H
GRS-K
GRS-S
GRS-T
GS
GSBAS
G-SBAS
GSCN
GSM
GSRD
GSVP
GUI
GW
Gyro
Ground Segment
Geostationary Broadcast Area
Geostationary Earth Orbit or
INMARSAT Geostationary satellite
Ground Integrity Channel
Grid Ionospheric Vertical Delay
Grid Ionospheric Vertical Error
GLObal Navigation Satellite System
Global Maritime Distress and Safety System
Geostationary Navigation Overlay Service
Global Navigation Satellite System
GNSS First Generation
GNNS Panel
General Packet Radio Services
Global Positioning System
Ground RAIM
Geostationary Ranging Stations or
Geostationary Ranging System
GRS – Hartebeeshoek, South Africa
GRS – Kourou, Guyana
GRS – Singapore
GRS – Toulouse, France
Ground Speed or
Ground Segment
Geostationary Satellite Based Augmentation System
Geostationary-Satellite Based Augmentation Systems
Ground Segment Communication Network
Global System for Mobile communications
Ground Segment Requirements Document
Ground Segment Verification Plan
Graphical User Interface
GateWay
Gyroscope
H
H/W
HAL
HDI
31/01/2002
Hardware
Horizontal Alarm Limit
HeaDIng
6
HDLC
HDOP
HDU
HE
HID
HMI
HOW
HPA
HPL
HUNE
HW
HWE
High Level Data Link Control
Horizontal Dilution Of Precision
Hard Disk Unit
Hosting Entity
Hazardous Invalid Data
Hazardous Misleading Information
Hand Over Word
High Power Amplifier
High Precision Landing or
Horizontal Protection Level
Horizontal User Navigation Error
HardWare
Hardware Engineer
I
I
I/F
I/S
IALA
IAP
ICAO
ICB
ICD
ICO
ICRB
IDEF0
IERS
IF
IFF
IGP
IGS
IKD
ILS
IMO
INC
INMARSAT
INS
IOC
IOD
IODC
IODE
IODI
IODP
IOP
IOR
IP
IPP
31/01/2002
Inspection
InterFace
Interference / Signal
International Association of Lighthouse Authorities
Interoperability Action Plan
International Civil Aviation Organisation
Interface Control Board
Interface Control Document
Intermediate Circular Orbit
Interna Change Review Board
Integrated Design Functional model
International Earth Rotation Service
Intermediate Frequency
Identifier Friend (or Foe)
Ionospheric Grid Points
International GPS Service for Geodynalics
In Kind Delivery
Instrument Landing System or
Integrated Logistics Support
International Maritime Organisation
Inmarsat Navigation Center
International MARitime SATellite
Inertial Navigation System
Initial Operational Capability
Issue Of Data or Issuance Of Data
Issuance Of Data Clock
Issuance Of Data Ephemeris
Issuance Of Data Ionosphere
Issuance Of Data PRN
Initial Operations Phase
INMARSAT III – Indian Ocean Region
Internet Protocol
Ionospheric Pierce Point
7
IRD
IRS
ISDN
ISNS
ISO
ISOP
ISVV
IT
ITRF
ITT
ITU
Interface Requirements Document
Inertial Reference System
Integrated Services Digital Network
International Satellite Navigation System
International Organisation for Standard
In Service Operations Phase
Independent Software Verification and Validation
Integration Testing
International Terrestrial Reference Frame
Invitation To Tender
International Time Unit
J
JAA
JAR
JCB
JTC
JTSO
Joint Aviation Authorities
Joint Airworthiness Requirement
Joint Communications Board (ESA)
Joint Tripartite Committee
Joint Technical Standing Orders
K
Kbps
KO
KOM
Kilobits per second
Kick-Off
KO Meeting
L
L1
L2
LAAS
LAD
LADGPS
LAN
LAPB
LHC
LHCP
LMP
LNA
LO
LOC
LRU
LSA
LSB
31/01/2002
L1-GPS frequency (L1 = 1575,42 MHz)
L2-GPS frequency (L1 = 1227,2 MHz)
Local Area Augmentation System
Local Area Differential
Local Area Differential GPS
Local Area Network
Link Access Procedure for Balanced circuits
Left Hand Circular
Left Hand Circular Position
Logistic Management Plan
Low Noise Amplifier
Local Oscillator
Line Of Code
Line Replaceable Unit
Logistic Support Analysis
Least Significant Bit
8
M
M&C
MASPS
MCC
M-CCB
MCC1
MCC2
MCC-P
MCCRD
MCC-S
MCU
MD
ME
MEDLL
MEL
MLS
MMEL
MMI
MOPS
MPR
MRB
MRD
MRR
MSAS
MSB
MSER
MSG3
MTB
MTBF
MTBO
MTSAT
MTTR
Monitoring and Control
Minimum Aviation System Performance Standard
Master Control Centre
Mission Configuration Control Board
Principal Master Control Centre
Backup Master Control Centre
Master Control Centre (Primary)
MCC Requirements Document
Master Control Centre (Secondary)
Management & Control Unit
Miss Detection
Multipath Error
Multipath Estimating Delay Lock Loop
Minimum Equipment List
Microwave Landing System
Master MEL
Man Machine Interface
Minimum Operational Performance Standard
Mission Performance Requirements
Material Review Board
Mission Requirements Document
Mission Requirements Review
Multi-transport Satellite-based Augmentation System
Most Significant Bit
Manager for in-SERvice phase
Maintenance Steering Group 3
Mediterranean Test Bed
Mean Time Between Failures
Mean Time Between Outages
Multi Transport SATellite
Mean Time To Restore an outage
N
NA or N/A
NAS
NATS
NAV
NC
NCC
NCM
NCR
NCRB
NI
NIHID
NLES
NLES-1B
31/01/2002
Note Applicable
National Airspace System or National Air Space
National Air Traffic Services (UK)
NAVigation sub-system
Non Compliant
Network Control Centre
Network Control Management
Non-Conformance Report
Non-conformance Review Board
Non Integrity
Non-Integrity Hazardous Invalid Data
Navigation Land Earth Station
Backup to NLES-R
9
NLES-2B
NLES-A
NLES-R
NLESRD
NM
NMC
NMF
NOC
NOCC
NOTAM
NPA
NPL
NSA
NSE
NTW
NTWRD
Backup to NLES-A
NLES – Aussagel France
NLES – Riesting Germany
NLES Requirements Document
Nautical Mile
Network Management Center
Network Management Facility
Network Operations Centre
Network Operation Control Centre
Notice To Airmen
Non Precision Approach
National Physical Laboratory
Navigation Service Availability
Navigation System Error
Network
Network Requirements Document
O
O&M
OCD
OCR
OD
OHA
ORD
ORR
O/S
OSI
Operation & Maintenance
Operation Concept Document
Operational & Certification Requirement
Orbit Designation
Operating Hazard Analysis
Operations Requirements Document
Operational Readiness Review
Operating System
Open Systems Interconnection
P
P&C
PA
PACF
PACFRD
PAD
PAE
PAM
PAP
PB-NAV
PBMF
PC
P-CCB
PDOP
PDP
PDR
PFA
PFD
PHD
31/01/2002
Processing and Control
Product Assurance
Performance Assessment and Check-out Platform
PACF Requirements Document
Packet Assembler-Disassembler
PA Engineer
PA Manager
Product Assurance Plan
Programme Board-Navigation (ESA)
Performance Budget Management File
Personal Computer
Programme Configuration Control Board
Position Dilution Of Precision
Project Development Plan
Preliminary Design Review
Probability of False Alarm
Power Flux Density
Project History Document
10
PHST
PIDS
PM
PMD
PMP
PN
POP
POR
PP
PPS
PRE
PRN
PS
PS-CCB
PSC
PSPDN
PSS
PSTN
PT
PTT
PTT
PU
PVC
PVM
PVT
Packing, Handling, Storage & Transport Plan
Prime Item Development Specification
Progress Meeting or Preventive Maintenance or Project
Management
Probability of Missed Detection
Project Management Plan
Pseudo Noise
Points Of Presence or Preliminary Operations Phase
Pacific Ocean Region
Present Position
Precise Positioning Service or
Pulse Per Second
Pseudo-Range Error
Pseudo Random Noise
Power Supply
Project/System Configuration Control Board
Project Safety Concern
Packet-Switched Public Data Network
Procedures, Standards and Specifications
Public Switched Telephone Network
Product Tree
Public Telephone and Telegraph authority (National
organisation)
Project Tracking Team
Portable Unit
Permanent Virtual Circuit
Procedure Verification Matrix
Position, Velocity, Time
Q
QA
QFE
QMS
QoS
QR
Quality Assurance
barometric pressure at runway threshold
Quality Management System
Quality of Service
Qualification Review
R
RAAS
RAIM
RAM
RAMS
RB
RCF
RCS
31/01/2002
Regional Area Augmentation System
Receiver Autonomous Integrity Monitoring
Reliability Availability and Maintainability or Random Access
Memory
Reliability Availability, Maintainability and Safety
Review Board
Ranging Control Facility
Revision Control System
11
RCVR
RD
REC
RF
RFC
RFD
RFDC
RFE
RFI
RFLAB
RFQ
RFW
R-GEO
RGIC
RGS
RHC
RHCP
RID
RIMS
RIMSRD
RMS
RNAV
RNP
ROD
ROR
RPU
RRC
RS
RST
RTCA
RTK
RTOS
RTSS
RX
Receiver
Requirements Document or Reference Document
Range Error Correction
Radio Frequency
RF Conversion or Request For Change
Request For Deviation
RF Down Converter
RF front End
Radio Frequency Interference
RF measurement LABoratory
Request For Quotation
Request For Waiver
Ranging via GEO satellites
Ranging and Ground Integrity Channel
Ranging Ground Segment
Right Hand Circularly polarised
Right Hand Circular Polarisation
Review Item Discrepancy
Ranging and Integrity Monitoring Station or
Remote Integrity Monitoring Station
RIMS Requirements Document
Root Mean Square
Radio NAVigation
Required Navigation Performance or
Required Navigation Parameters
Review Of Design
Range Only Radar
Receiver Processing Unit
Range-Rate Corrections
Remote Station or
Reference Station
Reference System Time
Radio Technical Commission for Aeronautics or
Radio Technical Committee of America
Real Time Kinematics
Real Time Operating System
Real-Time Simulation Segment
Receiver
S
S/C
S/W
SA
SADT
SAN
SARP(s)
SAW
SBAS
31/01/2002
SpaceCraft
SoftWare
Selective Availability
Structure Analysis and Design Technical
Satellite Access Node
Standards And Recommended Practices
Surface Acoustic Wave
Satellite Based Augmentation System
12
SC
SCAR
SCAT-I
SCC
SCL
SCM
SCMP
SCO
SCQR/R
SCR
SCSI
SDM
SE
SECT
SeKO
SEP
SFVP
SGS
SGS-90
SIS
SIVP
SL
SLA
SLRD
SMR
SNA
SNAPAS
SNMP
SNR
SNT
SOC
SOLAS
SOP
SOW
SPACS
SPM
SPMP
SPR
SPS
SQAP
SQL
SQP
SQR
SR
SR/R
SRAM
SRB
SRD
31/01/2002
Software Component
Software Component Acceptance Review
Special CATegory I
Satellite Control Centre
Station de Connexion et Localisation
Software Configuration Management
Software Configuration Management Plan
Software Change Order
Software Component Qualification Readiness Review
Software Change Request
Small Computer System Interface
System Definition Manual
EGNOS Subsystem Element
System Engineering Core Team
Set Kick Off
Support Equipment Plan
Support Facility Verification Plan
Soviet Geocentric System
Soviet Geodetic System
Signal In Space
Site Integration Validation Plan
Service Level or Station de Localisation
Service Level Agreement (with network service provider)
System Level Requirements Document or
SL Requirements Document
Software Modification Report
Satellite Navigation Application
Satellite Navigation Performance Analysis Software
Simple Network Management Protocol
Signal to Noise Ratio
Satellite Navigation Transponder
Spacecraft Operation Centre
Safety of Life At Sea
System Operation Plan
Statement Of Work
Simplified Position Accuracy Calculation Software
System Project Management
System Project Management Plan or Software Project
Management Plan
Software Problem Report
Standard Positioning Service
Software Quality Assurance Plan
Software Query Language
System Qualification Plan
System Qualification Review
Standard Receiver or Software Requirements
Software Requirements Review
Static Random Access Memory
Software Review Board
System Requirements Document or Software Requirement
13
SRN
SSAR
SSATR
SSCDR
SSDD
SSFQR
SSKO
SSN
SSPA
SSPDR
SSR
SSRD
SSTRR
ST
STD
STEP1
STEP2
STEP3
STNA
STR
STRR
SU
SUM
SV
SVC
SVP
SVVP
SW
SWPM
SWRU
Document
Software Release Note
Sub System Acceptance Review
Sub System Acceptance Test Review
Sub System CDR
System Segment Design Document
Sub System Factory Qualification Review
Sub System Kick Off
Sun Spot Number
Solid State Power Amplifier
Sub System PDR
Site Selection Review
Sub-System Requirements Document
Sub System Test Readiness Review
System Testing
Software Transfer Document
R-GEO augmentation
GIC augmentation
WAD augmentation
Service Technique Navigation Aerienne (F)
System Test Readiness
System Test Readiness Review
SUpplier
Software User Manual
Space Vehicle
Switch Virtual Circuit
System Verification Plan or Software Verification Plan or
Subsystem Verification Plan
Software Verification and Validation Plan
SoftWare
SoftWare Project Manager
Software Replaceable Units
T
T
T4S
TA
TAS
TBC
TBD
TBO
TBS
TCP
TCP/IP
TE
31/01/2002
Test or Time
Thomson-CSF / Services et Systemes Sol Spatiaux
Terminal Adapter (ISDN modem)
True Air Speed
To Be Clarified or
To Be Confirmed
To Be Defined or
To Be Determined
Time Between Outages
To Be Studied
To Be Specified by the contractor
Transmission Control Protocol
Transmission Control Protocol/Internet Protocol
Test Engineer
14
TEB
TEC
TF
TGNSS
TH
TL
TLM
TLS
TM
TMA
TN
TN-033
TN-069
TOW
TPG
TRAC
TRB
TRO
TRR
TRSF
TS
TSE
TSF
TSO
TTC
TUE
TWAN
Tx
Tender Evaluation Board
Total Electron Content
Task Force
NLES reference Time
True Heading
Team Leader
TeLeMetry
Target Level of Safety
TeleMetry
Technique Management Area
Technical Note
Technical Note on EGNOS overlay services
Operation Concept Document
Time Of Week
Time of Propagation
Traceability Report
Test Review Board
Time to Restore an Outage
Test Readiness Review
Transfer
Training Segment
Total System Error = ( NSE2 + FTE2)1/2
Test and Simulation Facilities
Technical Standard Order
Telemetry, Tracking and Command
Test User Equipment
Transport Wide Area Network
Transmitter
U
UDP
UDRE
UEE
UERE
UHF
UIVD
UIVE
UNE
UPS
UR
UR/R
URA
URD
URE
US
USAT
USRD
31/01/2002
User Datagram Protocol
User Differential Range Error
User Equipment Error
User Equivalent Range Error
Ultra High Frequency
User Ionospheric Vertical Delay
User Ionospheric Vertical Error
User Navigation Error
Uninterruptible Power Supply
User Requirements
User Requirements Review
User Range Accuracy
User Requirements Document
User Range Error
United States or
User Segment
Ultra-Small Aperture Terminal (satellites terminal)
User Segment Requirements Document
15
UTC
Universal Co-ordinated Time
V
VAL
VCB
VDOP
VHF
VNSE
VOR
VPL
VRD
VSAT
VTE
VTS
VUNE
Vertical Alarm Limit
Verification Control Board
Vertical Dilution Of Precision
Very High Frequency
Vertical Navigation System Error
VHF Omnidirectional Ranging
Vertical Protection Level
Verification Requirements Document
Very Small Aperture Terminal
Vertical Tropospheric compensation Error
Vessel Traffic Surveillance
Vertical User Navigation Error
W
WAAS
WAC
WAD
WADC
WADGPS
WBS
WD
WGS
WGS-84
WIMP
WN
WP
WPD
WS
31/01/2002
Wide Area Augmentation System
Wide Area Correction
Wide Area Differential
Wide Area Differential Correction
Wide Area Differential GPS
Work Breakdown Structure
Wind Direction
World Geodesic System
World Geodetic System
Windows Icons Mouse Pointer
Week Number
WorkPackage
WorkPackage Description
Wind Speed
16