Abbreviations and Acronyms Commonly Used in Technology



Technology uses acronyms and abbreviations without limit. Whether it is engineering or medical or space, it becomes hard to make out what technologist and their literature uses to convey the messages. You can find every now and then these technologist and technocrats throwing jargon like acronyms and abbreviations. occasionally these jargon make the investor or buyer of the technology products gets mad and hard to understand. This page will help you to sort out such situations some extend.



Abbreviations and Acronyms Used in Technology - A

A-S: Anti-spoofing

AC: Advisory Circular

AC or ac: Alternating current

A/C: Aircraft

A/c: Air conditioner

A/D: Analog/Digital converter

A/G: Air Ground

AAC: Aeronautical Administrative Communication

AAF: Associate Administrator for Airway Facilities

AAL: Alaskan Regional Headquarters

AAP: Advanced Automation Program

AAPO: Associate Administrator for the Performing Organization

AAR: Office of Aviation Research

AAR: Airport Acceptance Rate

AAS: Advanced Automated System

AASO: Associate Administrator of the Sponsoring Organization

AAT: Associate Administrator for Air Traffic

ABCP: Airborne Command Post

ABL: Allocated Baseline

ABPSK: Aviation Binary Phase Shift Keying

ABS: Automatic Blink System

AC: Alternating Current

ACAA: Air Carrier Association of America

ACARS: Aviation Communications Addressing and Reporting System

ACAS: Airborne Collision Avoidance System

ACC: Air Control Center

ACCC: Area Control Computer Complex

ACE: Central Regional Headquarters

ACEP: Airport Capacity Enhancement Plan

ACEPS: Air Traffic Control Center Critical/Emergency Power System

ACF: Area Control Facility

ACI: Adjacent Channel Interface

ACK: Acknowledge Signal

ACKCTL: Acknowledge Control

ACM: Availability Coverage Modeling

ACMS: Aircraft Condition Monitoring System

ACN: Engineering, Research and Development Service

ACO: Aircraft Certification Office

ACS: Active Control System

ACSE: Access Control and Signaling Equipment

Active Waypoint: A waypoint to or from which navigational guidance is being provided. For a parallel offset, the active waypoint may or may not be at the same geographical position as the parent waypoint. When not in the parallel offset mode (operating on the parent route), the active and parent waypoints are at the same geographical position.

ACU: Antenna Control Unit

ACV: Accuracy Validation

ACWP: Actual Cost of Work Performed

ACY: Atlantic City, NJ FAA Technical Center

ACDO: Air Carrier District Office

ADAP: Airport Development Aid Program

ADC: Air Data Computer/Analog to Digital Converter

ADD: Algorithm Description Document

ADF: Automatic Direction Finder

ADGE: Air Defense Ground Environment

ADI: Attitude Direction Indicator

ADIZ: Air Defense Indication Zone

ADL: Aeronautical Data-Link

ADLP: Aircraft Data Link Processor

ADLS: Aeronautical Data Link System

ADLVT: Aeronautical Data Link Validation Team

ADM: Administration Identifier/Acquisition Decision Memorandum

ADNS: ARINC Data Network Service

ADR: 1.Accumulated Delta Ranging/Architectural Design Review 2.Alternative Dispute Resolution

ADS: Automatic Dependent Surveillance

ADS-B: Automatic Dependant Surveillance-Broadcast

Advisory: An annunciation that is generated when crew awareness is required and subsequent crew action may be required; the associated color is unique but not red or amber/yellow. (Source AE: Antenna Electronics

AEA: Aircraft Electronics Association

AEEC: Airlines Electronic Engineering Committee

AEFT: Active Element Fault Tree

AEI: Auroral-E Ionization

AERA: Automated En Route Air Traffic Control

AES: Aeronautical Earth Station/Aircraft Earth Station

AF: Airway Facilities

AFB: Air Force Base

AFC: Automatic Frequency Compensation

AFCC: Air Force Communications Command

AFCS: Automatic Flight Control Systems

AFEPS: ACARS Front End Processing Systems

AFI: Authority and Format Identifier

AFII: Advanced Flight Inspection Initiative

AFOTEC: Air Force Operational Test & Evaluation Center

AFS: Flight Standards Service

AFSC: Air Force Systems Command

AFSPACECOM: Air Force Space Command

AFSS: Automated Flight Service Station

AFTN: Aeronautical Fixed Telecommunications Network

AGATE: Advanced General Aviation Transport Experiments

AGC: Automatic Gain Control

AGL: Above Ground Level

AGL: Great Lakes Region

AGS: Air/Ground System

AHRS: Attitude Heading Reference System

AHS: American Helicopter Society

AII: Accuracy Improvement Initiative

AIP: Airport Improvement Program

AIP: Aviation Information Publications

AIR: Aircraft Certification Service

AIX: Advanced Interactive Executive

AJ: Anti-Jamming

Along – Track Distance: The distance along the desired track from the waypoint to the perpendicular line from the desired track to the aircraft.

ALE: Automatic Link Establish

ALG: Logistics Service

ALP: Airport Layout Plan

ALSIP: Approach Lighting System Improvement Program

ALSOH: Automated L-band State of Health

ALSF: Approach Lighting System with Sequenced Flashing Lights

AMASS: Airport Movement Area Safety System

AM/PM: Amplitude Modulation-to-Phase Modulation

AMC: Aeronautical Mobil Communications/Aeronautical Center

AMCP: Aeronautical Mobil Communications Panel

AMS: Acquisition Management System

AMSS: Aeronautical Mobil Satellite Service

AMSS: Airborne Mobile Services System

ANA: Area Navigation Approach

ANC: Air Navigation Commission of ICAO

ANCP: Alternate Network Control Point

ANCT: Aircraft Network Control Terminal

AND: Associate Administrator for NAS Development

ANE: New England Regional Headquarters

ANH: Access Node Hub

ANICS: Alaskan National Airspace System Interfacility Communication Systems

ANM: Northwest Mountain Regional Headquarters

ANN: Program Director for Navigation and Landing

ANP: Actual Navigation Performance

ANSEP: Air Navigation Services Economic Panel

ANSI: American National Standards Institute

AOAS: Advanced Oceanic Automation System

AOC: Airport Obstruction Chart

AOC: Aircraft Operational Control/Aeronautical Operational Control

AOL: Airborne Optical Laser

AOP: Aeronautical OSI Profile

AOPA: Aircraft Owners and Pilots Association

AOR: Atlantic Ocean Region

AOR-E: Atlantic Ocean Region East

AOR-W: Atlantic Ocean Region West

AOS: Operational Support Services

AP: Acquisition Plan

APB: Acquisition Program Baseline

APC: Adaptive Predicative Coding/Aeronautical Passenger Comm.

APC: Acquisition Processing Cabinets

API: Application Program Interface

APL: Airport Pseudolites

APM: Associate Program Manager

APME: Associate Program Manager for Engineering

APML: Associate Program Manager for Logistics

APMNI: Associate Program Manager for NAS Implementation

APMSE: Associate Program Manager for Systems Engineering

APMT: Associate Program Manager for Test

APP: Annual Procurement Plan

APPS: Aeronautical Radio Facilities and Parts Provisioning System

Applications: Specific use of systems that address particular user requirements. For the case of GNSS, applications are defined in terms of specific operational scenarios.

APR: Automatic Position Reporting/Agency Procurement Request

APS: Acquisition Phase Summary

APV: Approach Procedure with Vertical guidance

AQPSK: Aviation Quadrature Phase Shift Keying

ARA: 1.Airborne Radar Approach 2.Administrator for Research & Acquisitions

ARAC: Aviation Regulatory Advisory Committe

ARAMT: ARA Management Team

ARC: Acquisition Review Committee

ARCS: Automatic Route Control System

ARD: Research and Development Service

Area Navigation (RNAV): Application of the navigation process providing the capability to establish and maintain a flight path on any arbitrary chosen course that remains within the coverage area of navigation sources being used. RNAV utilizing capabilities in the horizontal plane only is called 2D RNAV, while RNAV, which also incorporates vertical guidance, is called 3D RNAV. Time navigation (TNAV) may be added to either 2D or 3D systems. TNAV added to a 3D system is called 4D.

ARIG: Acquisition Reform Interim Guidance

ARINC: Aeronautical Radio, Inc.

ARM: Autonomous Ranging Mode

ARMS: Automated Risk Management System

ARQ: Automatic Repeat Request

ARS: Area Selector

ARSR: Air Route Surveillance Radar

ARTCC: Air Route Traffic Control Center

ARTS: Automatic Radar Terminal System

ASAG: Acquisition System Advisory Group

ASAS: Aviation Safety Analysis System

ASCII: American Standard Code for Information Interchange

ASIC: Application Specific Integrated Circuit

ASCQC: Aeronautical Satellite Communications Qualifications Center

ASD: Associate Administrator for Systems Engineering and Development

ASDE: Airport Surface Detection Equipment

ASE: Airborne System Error/NAS System Engineering Service

ASF: Additional Secondary Factor (related to Loran-C; ASF means the difference in propagation time between the transmitter and receiver for the actual path as compared to an all seawater path of the same distance)

ASIC: Application Specific Integrated Circuit

ASN or ASN2: Access Stack Node 2

ASO: Southern Regional Headquarters

ASOPT: Advanced System Operational Planning Team

ASORRF: Start of a Aircraft Receive Reporting Frame

ASORTCF: Start of a Aircraft Receive Terminal Control Frame

ASOS: Automated Surface Observing

ASR: Airport Surveillance Radar

ASP: 1.Acquisition Strategy Paper 2.Aviation Sequencing Program

ASPM: Aviation System Performance Metric

ASTA: Airport Surface Traffic Automation

ASW: Southwest Regional Headquarters

AT: Air Traffic

ATA: Air Transport Association

ATC: Air Traffic Control

ATCBI: Air Traffic Control Beacon Interrogator

ATCRBS: Air Traffic Control Radar Beacon System

ATCSCC: Air Traffic Control System Command Center

ATCT: Airport Traffic Control Tower

ATIDS: Airport Surface Target Identification System

ATE: Automatic Test Equipment

ATIS: Automatic Terminal Information Service

ATM: Air Traffic Management

ATN: Aeronautical Telecommunications Network

ATOMS: Air Traffic Operational Management System

ATR: Air Traffic Plans and Requirements Service

ATS: Air Traffic Service

ATSC: Air Traffic Services Communications

ATSMP: Air Traffic Services Message Processor

ATSOIT: Air Traffic Satellite Operational Implementation Team

ATSS: Air Traffic Services System

AUI: Attachment Unit Interface

AUTOVON: Automatic Voice Network

Availability: The availability of a navigation system is the ability of the system to provide the required function and performance at the initiation of the intended operation. Availability is an indication of the ability of the system to provide usable service within the specified coverage area. Signal availability is the percentage of time that navigational signals transmitted from external sources are available for use. Availability is a function of both the physical characteristics of the environment and the technical capabilities of the transmitter facilities.

AVCS: Attitude and Velocity Control Subsystems

AVLN: Automatic Vehicle Location and Navigation

AVN: Aviation System Standard

AVR: Associate Administrator for Regulation & Certification

AVPAC: Aviation VHF Packet Communications

AWIPS: Advanced Weather Interactive Processing System

AWOP: All Weather Operations Panel

AWP: Western Pacific Regional Headquarters B1: Hardware Requirement Specification

Abbreviations and Acronyms Used in Technology - B

BA: Barometric Altitude - Geopotential altitude in the earths atmosphere above mean standard sea level pressure datum surface, measured by a pressure (barometric) altimeter.

BA: Bachelor of Arts

BBN: Basic Backup Network

BCD: Binary Coded Decimal

BCN: Backbone Concentrator Node

BCS: Buoy Communications System

BCWP: Budgeted Cost of Work Performed

BCWS: Budgeted Cost of Work Scheduled

BE: Binary Editor

BER: Bit Error Rate

BGR-AFSS: Bangor, ME Automated Flight Service Station

BI: Burst Interval

BIL: Billings, MT TRACON

BILL: Billing System

BIPM: International Bureau of Weights & Measures

BIT: Built-in Test

BITE: Built-in Test Equipment/Backward Inter-working Telephone Event

BL: Burst Length

BMN: Baseline Management Notice

BMV: Broadcast Message Validation

BNR: Binary Numbers

BOM: Bill Of Material

BONeS: Block Oriented Network Simulator

BOP: Bit-Oriented Protocol

BOS: Beginning Of Slot

BPF: Band Pass Filter

Bps: Bits Per Second

BPSK: Binary Phase Shift Keying

BS: Bachelor of Science

BSEE: Bachelor of Science, Electrical Engineering

BT: British Telecom

BTP: Baseline Transfer Plan

BTP: Burst Time Plan

BU: Block Update

BUEC: Backup Emergency Communication

BUFR: Binary Universal Form for Data Representation

BW: Bandwidth

Abbreviations and Acronyms Used in Technology - C

C: Celsius

C-1: Correction Processor 1

C-2: Correction Processor 2

C&V: Correction and Verification

C-TO-l: C-band to L-band

C/A: Coarse/Acquisition

C/A-CODE: Coarse Acquisition Code

C/NO: Carrier-to-Noise-Density Ratio

C/SCSC: Cost/Schedule Control System Criteria

C/SSR: Cost/Schedule Status Reporting

CAA: 1. Cargo Airlines Association 2. Civil Aviation Authority

C3I: Command, Control, Communications, and Intelligence

CA: California

CAATS: Canadian Automated Air Traffic System

CAGE: Commercial and Government Entity

CAI: Contractor Acceptance Inspection

CAM: Cost Account Manager

CAP: Cost Account Plan

CAS: 1. Collision Avoidance System 2. Commercially Available Software 3. Cost Accounting Standards

CASB: Cost Account Standards Board

CASE: Computer Aided Software Engineering

CAT: Category

CAT-I: Category I

Caution: An annunciation that is generated when immediate crew awareness is required and subsequent crew action will be required; the associated color is amber/yellow. (Source CB: Clock Bias

CBB: Contractor Budget Base

CBM: Clock Bias Mean

CBA: Cost Benefit Analysis

CBD: Commerce Business Daily

CBI: Computer-Based Instruction

CC: Connection Confirmation

CC: Clock Correction

CCB: 1. Communication Control Block 2. Configuration Control Board 3. Change Control Board

CCC: Communications Control Circuit

CCD: Configuration Control Decision

CCIR: International Radio Consultative Committee

CCITT: International Telegraph and Telephone Consultative Committee

CCR: Constant Current Regulator

CCS: Command and Control Systems

CCU: Computer Control Unit

CCZ: Coastal Confluence Zone

CD: Compact Disk

CDB: Cold Bay FSS

CDG: Course Design Guide

CD-ROM: Compact Disk-Read Only Memory

CDI: Course Deviation Indicator

CDLS: Contract Data Requirement List

CDM: Collaborative Decision-Making

CDMA: Code-Division Multiple Access

CDR: Critical Design Review

CDRL: Contract Data Requirement

CDU: Control Display Unit

CE: Concept Exploration

CEA: Central Engineering Activity

CEP: Circular Error Probable

CF: Course-to-Fix

CERAP: Combined Enroute Radar Approach Control Facility

CERB: Cost Estimate Review Board

CFB: Contract Funding Brief

CFE: Communications Facilities Enhancement

CFE: Contractor-Furnished Equipment

CFIT: Controlled Flight into Terrain

CFNO: Current Frame Number

CFSR: Contract Funds Status Report

CGIC: Civil GPS Information Center

CHI: Computer Human Interface

CHIWG: Computer Human Interface Working Group

CI: Configuration Item

CID: Commercial Item Drawing

CIDS: Critical Item Development Specification

CIO: Conventional International Origin

CIP: Capital Improvement Plan

cm: Centimeters

cm/sec: Centimeters/Second

CIGNET: Cooperative International GPS Network

CIP: Capital Investment Plan

CIPP: Critical Infrastructure Protection Plan

CIS: Conventional Inertial System/Commonwealth of Independent States

CIT: California Institute of Technology

CLIN: Contract Line Item Number

CLK: Clock

cm: Centimeters

CM: 1. Configuration Management 2. Center of Mass 3. Corrective Maintenance

CMA: Configuration Management Administration

CMC: Canadian Marconi Corporation

CMCC: Consolidated Maintenance Control Center

CMD: Control C&V Mode

CMDR: Satellite Operations Crew Commander

CMLS: Contractor Maintenance Logistics Support

CMM: Capability Maturity Model

CMN: Control Motion Noise

CMP: Configuration Management Plan

CMTBF: Mean Time Between Mission Critical Failures

CMTP: Contractor Master Test Plan

CMU: Communications Management Unit/Computer Management Unit

CNI: Communications, Navigation, and Intelligence

CNMP: Capability Maturity Model

CNS/ATM: Communications, Navigation, and Surveillance/Air Traffic Management

CNS: Communications, Navigation, and Surveillance

CNSI: Common Network Security Interface

CO: Contracting Officer

COB: Close Of Business

COCO: Chief of the Contracting Office

CODEC: Coder-Decoder

COF: Continuity of Function

COI: Critical Operational Issue

COM: 1. Control C&V Operations and Maintenance 2. Cost of Money

Comm: Communications

COMSAT: Communications Satellite Corporation

COMSEC: Communications Security

CONOPS: Concept of Operations

CONS: Connector-Oriented Network Service

CONUS: Continental US; Conterminous/Contiguous US

CONV: Conversion

COP: Character-Oriented Protocol

COR: Correction Host Processor

COTR: Contracting Officers Technical Representative

COTS: Commercial Off-the-Shelf

CP: Reference Number for a Telephone Call

CP: Corrections Processor

CPC: Computer Program Component

CPCI: Computer Program Configuration Item

CPDLC: Controller-Pilot Data Link Communication

CPF: Central Processing Facility

CPFS: Computer Program Functional Specification

CPI: Consumer Price Index

CPM: Carrier Link Frequency 1575.42 MHz

CPR: Cost Performance Report

CPU: Central Processing Unit

CR: Connection Request

CRC: Cyclic Redundancy Check

CRDA: Cooperative Research and Development Agreement

CRF: Connection Refused

CRL: Communication Research Laboratory

CRISD: Computer Resources Integrated Support Document

CRM: Collision Risk Model

CRPA: Controlled Radiation Patterned Antenna

CRR: Common Reference Receiver

CRS: Contractor Repair Service

CRT: Cathode Ray Tubes

CS: 1. Civil Signal 2. Control Segment

CSAR: Configuration Status Accounting Report

CSC: Computer Software Component

CSCI: Computer Software Configuration Item

CSE: Common Support Equipment

CSEP: Common Systems Engineering Process

CSMA/CD: Carrier Sense Multiple Access with Collision Detection

CSOC: Consolidated Space Operations Center (Falcon AFS)

CSPR: Report Cost/Schedule Performance

CSQPP: Computer Software Quality Program Plan

CSTP: Contractor Support Transition Plan

CSU: Computer Software Unit/Channel Service Units

CSWP: Common Software Process

CT: Connecticut

CTCOR: Clock and Time Coordinator

CTEMP: Contractor Test and Evaluation Master Plan

CUE: Common User Element

CV: Correction and Verification

CW: Continuous Wave

CWBS: Contract Work Breakdown Structure

CY: Calendar Year

Abbreviations and Acronyms Used in Technology - D

D: Delivery Confirmation Bit

DA: Decision Altitude

DAA: Designated Approving Authority

DA (H): Decision Altitude (Height)

DAL: Development Assurance Level

DAS: Data Approval Sheet

DAU: Determine Alarm or Update

DAY: Dayton AFSS

DLAP: Data Link Application Processor

dB: Decibels

db/*K: Decibels per degree Kelvin

dBHz: Decibel Hertz

dBi: Decibel relative to isotropically radiated power

Dbic: Decibels above Isotropic

DBil: (Decibels Isotropic Linear)

DBL: Development Baseline

dBW: Decibel relative to 1 Watt

DBW/M2: Decibel relative to 1 Watt per square meter

D.C.: District of Columbia

DC: Direct Current

DCAA: Defense Contract Audit Agency

DCACAS: Data Collection, Analysis, and Corrective Action System,

DCE: Data Communication Equipment

DCH: Datum Crossing Height

DCMDR: Deputy Satellite Operations Crew Commander

DCN: Design Change Notice

DCP: Data Collection Processing CSCI; Data Collection Processor

DCT: Dynamic Configuration Tool

DD: 1. Data Dictionary 2. Detailed Design

DDC: Direct Digital Connect

DDE: Data Dictionary Entry

DDR: Derived Design Requirements

DDS: Direct Digital Synthesizer

DDT: Design Data Transmittal

DEC: Data Circuit-Terminating Equipment

DED: Data Editing

DEDS: Data Entry and Display Subsystem

deg: Degree

DEMARC: Demarcation

DEMVAL: Demonstration and Validation

DER: Designated Engineering Representative

DF: Direction Funding

DFD: Data Flow Diagram

DFR: Detailed Financial Review

DGNSS: Differential Global Satellite Navigation System

DGPS: Differential Global Positioning System

DH: Decision Height

DHCP: Dynamic Host Configuration Protocol

DI: Data Integration and Calculation

DID: Data Item Description

DL: Data Link

DLL: Delay Lock Loop

DLO: Data Link Only

DLP: Data Link Processor

DLS: Data Link Service

DLSC: Defense Logistics Services Center

DLT: Digital Linear Tape

DM: Data Management

DMA: Defense Mapping Agency

DME: Distance Measuring Equipment

DMN: Data Multiplexing Network

Dn: Time Control Correction

DNS: Domain Name System

DoC: Department of Commerce

DoD: Department of Defense

DoDISS: Department of Defense Index of Specifications and Standards

DOM: Derivatives of Observables with Respect to Parameters

DOORS: Dynamic Object Oriented Requirements System

DOP: Dilution Of Precision

DOT: Department of Transportation

DOTS: Dynamic Ocean Tacking System

DP: Datum Point

DPA: Delegation of Procurement Authority

DPP: SCP Data Preprocessor

dpi: Dots per inch

DPR: Differential Pseudorange

DPRC: Differential Pseudorange Correction

DPS: Digital Power Supply

DPSSF: Data Processing and Software Simulation Facility

DQT: Design Qualification Test

DR: Delta Range/Dead Reckoning

D.R.: Dead Reckoning

DRAM: Direct Random Access Memory

DRE: Differential Range Error

DRM: Design Room Manual

DRMAP: Data Responsibility Matrix/Acceptance Plan

DRMS: Distance Root Mean Square (not to be confused with Sigma)

DRO: Dispute Resolution Officer

DRS: Data Reduction Software

DRT: Diagnostic Rhyme Test

DS: Define Test Scenario

DSLOC: Delivered Software Lines Of Code

DSP: Digital Signal Processing

DSO: Digital signal, level zero

DSR: Data Set Ready

DSR: Display System Replacement

DSSS: Decision Support System Services

DSU: Data Service Unit

DT&E: Development Test and Evaluation

DTC: Design-to-Cost/Dry Term Correction

DTE: Data Terminal Equipment

DTE: Data Termination Equipment

DTR: Data Terminal Ready

DV: Data Validation

DVMRP: Distance Vector Multicast Routing Protocol

DVRS: Digital Voice Recorder System

Abbreviations and Acronyms Used in Technology - E

E&R: Exchange and Repair

E-IGRP: Enhanced Interior Gateway Routing Protocol

EA: Environmental Assessment

EAC: Estimate at Completion

EAROM: Electrically Alterable Read Only Memory

EC: 1. Ephemeris CORRECTION 2. Executive Counsel

ECC: Error Checking and Correction

ECD: Envelope-to-Cycle Discrepancy

ECEF: Earth Centered Earth Fixed

ECEST: Ephermis and Clock Estimator

ECI: Earth-centered Inertial

ECM: Engineering Change Memorandum

ECP: Engineering Change Proposal

ECR: Engineering Change Request

ECU: European Currency Unit

EDC: Engineering Document Control

EDM: 1. Electronic Distance Measurement 2. Engineering Development Model

EDO: Extended Data Output

EDS: Explosives Detection System

EEM: Electronic Equipment Modification

EFAS: Extended Final Approach Segment

EFIS: Electronic Flight Instrument System

EGM: Earths Gravity Model

EGNOS: European Geostationary Navigation Overlay Service

EHF: Extremely High Frequency

EIA: Electronic Industries Association

EICAS: Engine Indicating and Crew Alerting System

EIRP: Effective Isotropic Radiated Power

EIRP: Effective Isotropic Radiated Power

EIS: Environment Impact Statement

El: Glidepath Angel (approach path elevation angle)

ELT: Emergency Locating Transmitter

EMC: Electro-Magnetic Compatibility

EMC: Electro-Magnetic Capacity

EMI: Electro-Magnetic Interference

EMP: Electro-Magnetic Pulse

EMR: Electromagnetic Radiation

ENB: Engineering Notebook

EO: Engineering Order

EOL: End Of Life

EOP: Earth Orientation Parameters

EOS: End Of Slot

EOS: Electro-Optical Segment

EPROM: Erasable Programmable Read Only Memory

EPS: Electrical Power (Sub) system

EQS: Equipment Selector

Eq: Equation

ER: En Route

ER-NPA: En Route through Nonprecision Approach

ERD: Estimated Range Deviation

ERL: Environmental Research Laboratories

ERP: Effective Radiated Power

ERRMP: Error Multipath

ERS: Early Resolution System

ES: Earth Station/End-System

ESC: Electronics Systems Center

ESD: Electrostatic Sensitive Discharge

ESD: Electrostatic Discharge

ESL: Economic Service Life

ESLOC: Equivalent Software Lines Of Code

ESP: Encapsulating Security Payloads

ETA: Estimated Time of Arrival

ETD: Explosives Trace Detection

ETMS: Enhance Traffic Management System

ETVS: Enhanced Terminal Voice Switch

EUL: End User Location

EVM: Earned Value Management

EVS: Enhanced Vision System

EWAAS: End-State Wide Area Augmentaition System

EXCOM: Executive Committee

Abbreviations and Acronyms Used in Technology - F

F&E: Facilities and Equipment

F-SAT: Final Site Acceptance Test

FAA: Federal Aviation Administration

FAALC: Federal Aviation Administration Logistics Center

FAAQ: Federal Aviation Administration Headquarters

FAATC: Federal Aviation Administration Technical Center

FAB: Federal Executive Advisory Board

FACES: Flight Management System Aeronautical Telecommunications Network Calibration through Enhanced Surveillance

FAE: FAA Acquisition Executive

FAF: Final Approach Fix

FANS: Future Air Navigation System

FAR: Federal Acquisition/Aviation Regulations

FAS: Final Approach Segment

FAST: FAA Acquisition System Toolset

FASTF: FAA Satellite Test Facility

FAT: Factory Acceptance Test

FATP: Factory Acceptance Test Plan

FAWP: Final Approach Waypoint

FBL: Functional Baseline

FCA: Functional Configuration Audit

FCC: Federal Communications Commission

FCP: Fast Correction Processing

FCS: Frame check sequence

FQC: Frequency Corrections

FCS: Flight Control System

FC: Fault Detection

FD: Format Simulated Data

FDA: Frequency Distribution Amplifier

FDAD: Full Digits ARTS Display

FDE: Fault Detection and Exclusion

FDIO: Flight Data Input and Output

FDMA: Frequency Division Multiple Access

FDX: Full Duplex

FEC: Forward Error Correction

FED: Federal

FES: Fast Ethernet Switch

FFRDC: Federally Funded Research and Development Center

FH: Frame-level header

FI: Fault Isolation

FID: Format Identifier Field

FIP: Federal Information Processing

FIR: Flight Information Region

FIRMR: Federal Information Resource Management Regulation

FIS: Flight Information Service

FL: Flight Level

FMC: Flight Management Computer

FMEA: Failure Modes and Effects Analysis

FMECA: Failure Mode, Effects, and Criticality Analysis

FMI: Flexible Modular Interface

FM: Frequency Modulation

FMS: Flight Management System

FMT: Format Message

FOB: Freight On Board

FOC: Full Operational Capacity/Capability

FOM: Figure of Merit

FONSI: Finding of No Significant Impact

FOUO: For Official Use Only

FP: Frequency Plan

FPAP: Flight Path Alignment Point

FPGA: Field Programmable Gate Arrays

FPS: Fixed Position Surveillance

FQR: Formal Qualification Review

FQT: Formal Qualification Testing

FQT: Formal Qualification Test

FRACAS: Failure Reporting and Corrective Action System

FRACAS: Failure Reporting, Analysis, and Corrective Action System

FRB: Failure Review Board

FRDF: Facility Reference Data File

FRE: Fast Routing Engine

FRP: Federal Radionavigation Plan

FRPA: Fixed Radiation Patterned Antenna

FSAS: Flight Service Automation System

FSD: Full-Scale Development

FSD: Full Scale Deflection

FSEP: Facility, Service, and Equipment Profile

FSL: Forecast Systems Laboratory

FSM: Firmware Support Manual

FSN: Frame Sequence Number

FSS: Federal Supply Schedule

FT&E: Feasibility Test Plan

FTA: Fault Tree Analysis

FTE: Flight Technical Error

FTI: FAA Telecommunications Infrastructure

FTP: File Transfer Protocol

FTS: Federal Telecommunications Service

FTS2000: File Transfer Service 2000

FVS: Functional Verification System

FX: Frequency Excision

FXNONAP: FX and Nonlinear Adaptive Processing

FY: Fiscal Year

Abbreviations and Acronyms Used in Technology - G

g: Acceleration of Gravity

g: Gram

G: Gain

G/T: Gain/Temperature

GA: General Aviation/Ground Antenna

GA&VF: General Aviation and Vertical Flight

GAO: General Accounting Office

GARB: GPS Alignment Reference Point

GB: Gigabyte

GBAS: Ground Based Augmentation System

GBI: Ground-Based Inerting

GCCS: Geostationary Communication and Control Segment

GCS: 1. Geostationary Communication Segment 2. GEO Communications Subsystem

GDLP: Ground Data Link Processor

GDM: General Development Model

GDM: Ground Model

GDOP: Geometric Dilution of Precision (in x,y,z,t for GPS)

GEG: GPS Ephemeris Geometry Processing

GEO: Geostationary Earth Orbit

GEOS: Geostationary Earth Orbit Satellite

GEP: GEO Ephemeris Processing

GES: Ground-Earth Station

GFE: Government-Furnished Equipment

GFI: Government Furnished Information

GFP: Government Furnished Property

GFS: Government Furnished Service

GG: GPS/GEO Data Collector

GHZ: Gigahertz (1 billion Hz)

GIB: Ground Integrity Broadcast

GIB/WAD: Ground Integrity Broadcast/Wide-Area Differential

GIC: Global Positioning System Integrity Channel

GICE: Government Independent Cost Estimate

GIP: Government Industry Partnership

GIPSY: GPS Inferred Positioning System

GIS: Geographic Information System

GIST: Global navigation satellite system In-Service Test

GIVE: Grid Ionospheric Vertical Error

GIVEI: Grid Ionospheric Vertical Error Indicator

GIWG: GPS International Working Group

GL: Ground Level

GL: GUS LRU Simulator

GLONASS: Global Orbiting Navigation Satellite System

GLONASS: Global Navigation Satellite System (Russia)

GLS: GNSS Landing System

GMC: Ground Monitoring and Control

GME: Gross Navigation Error

GMS: Ground Monitoring Equipment

GMS: Ground Monitoring Station

GMT: Greenwich Mean Time

GNE: Gross Navigational Error

GNG: GEO Navigation Data Generation

GNSS: Global Navigation Satellite System (ICAO)

GNSSU: GNSS (Landing) Unit

GOES: Geostationary Operational Environmental Satellite

GoM: Gulf of Mexico

GOS: Geocenter Offset and Coordinate Scaling

GOSPAR: GPS OCS Performance Analysis and Reporting

GP: 1. GUS Processing 2. GCS Processor

GPA: Glide Path Angle

GPI: Ground Point of Intercept

GPIP: Glide Path Intercept Point

GPIRU: Global Positioning Inertial Reference System

GPS: Global Positioning System

GPSIC: GPS Information Center

GPST: Global Positioning System Time

GR: Ground Reference

GRI: Ground Repetition Rate

GRIB: Gridded Binary

GRP: Host-Group Identifier

GRR: Group Repetition Rate

GRS: Geodetic Reference System

GS: GP Simulator

GSA: General Services Administration

GSO: Satellite Ground System Operator

GST: GEO Satellite Transponder

GTS: Global Timing System

GUI: Graphical User Interface

GUS: GEO Uplink Sub System

GUS: Ground Uplink Station

GUS_H: GEO Uplink Subsystem HWCI

GUSP: GUS Processor

Abbreviations and Acronyms Used in Technology - H

H/W: Hardware

HAL: Horizontal Alert Limit

HAT: Height Above Touchdown

HCI: Human Computer Interface

HD: High Dynamic

HDLC: High-level Data Link Control

HDOP: Horizontal Dilution of Precision (in x,y)

HDOP: Horizontal Dilution Of Precision

HDOP: Horizontal Dilution of Position

HDTV: High Definition Television

HDUE: High Dynamic User Equipment

HE: Human Engineering

HEDAD-M: Human Engineering Design Approach Document-Maintainer

HF: 1. High Frequency 2. Human Factors

HFE: Human Factors Engineering

HFP: Human Factors Plan

HGAS: High Gain Avionics System

HID: Host Interface Device

HIRF: High Intensity Radiation Fields

HILS: Helicopter Instrument Lighting System

HITS: Hughes Information Technology Systems

HLE: Higher Layer Entity

HMI: Hazardously Misleading Information

HNL: Honolulu, HI AFSS

HOCM: House Of Cards Model

HOCSR: Host/Oceanic Computer System Replacement

HOL: High Order Language (computer language)

HOT: Hands-On Training

HOW: Handover Word

HP: Hewlett Packard

HPA: High Power Amplifier

HPE: Horizontal Position Error

HPET: Horizontal Position Error Threshold

HPE: Horizontal Position Error

HPL: Horizontal Protection Level

HPR: Hardware Problem Reports

HQ: Headquarters

HRI: Hazard Risk Index

HRs: Hazard Records

Hrs: Hours

HRT: Hazard Review Team

H S I: Horizontal Situation Indicator

HST: Host Identifier

HTSC: Hughes Technical Services Company

HTZ: Helicopter Touchdown Zone

HUD: Heads Up Display

HUL: Horizontal Uncertainty Level

HVAC: Heating, Ventilation, and Air Conditioning

HW: Hardware

HWCI: Hardware Configuration Item

Hz: Hertz

Abbreviations and Acronyms Used in Technology - I


ICMM: Integrated Capability Maturity Model

I/F: Intermediate Frequency

I/O: Input/Output

I/S: Interference-to-Signal ratio

IA: Investment Analysis

IACSP: International Aeronautics Communications Service Provider

IADS: Iceland Air Defense System

IAF: Initial Approach Fix

IAG: International Association of Geodesy

IAP: Initial Approach Point/Instrument Approach Procedures

IAPA: Instrument Approach Procedures Automation

IAR: Investment Analysis Report

IATA: International Air Transport Association

IAU: International Astronomical Union

IAW: In Accordance With

IAWP: Initial Approach Waypoint

IBLS: Integrated Beacon Landing System

IBM: International Business Machines

IBP: Integration Build Plan

ICAO: 1. International Civil Aviation Organization 2. Intercard

IC: Ionospheric Correction

ICC: 1. Ionospheric Correction Computation 2. Iono Corrections Capability

ICD: 1. Interface Control Document/International Code Designator 2. Interface Control Document

ICDLS: Interim Contractor Depot and Logistics Support

ICMLS: Integrated Contractor Maintenance and Logistics Support

iCMM: Integrated Capability Maturity Model

ICMLS: Interim Contractor Maintenance and Logistics Support

ICMP: Internet Control Management Protocol

ICO: 1. Intermediate Circular Orbit 2. Initial Operating Capability

ICS: Interim Contractor Support

ICWG: Interface Control Working Group

ID: 1. Identification 2. Identifier

IDC: Interface Control Document

IDD: Interface Design Document

IDI: Initial Domain Identifier

IDM: Integrity Data Monitoring

IDM: Independent Data Monitor

IDR: Internal Design Review

IDV: Independent Data Verification

IDV: Independent Design Verification

IEC: International Electro technical Commission

IEEE: 1. International Electrical and Electronic Engineers 2. Institute of Electrical Engineers

IERS: International Earth Rotation Service

IETF: Internet Engineering Task Force

IETM: Interim Electronic Technical Manuel

IF: 1. Intermediate Frequency 2. Interface

IFM: Interface Management

IFR: Instrument Flight Rules

IGEB: Interagency GPS Executive Board

IGES: Initial Ground Earth Station

IGMP: Internet Group Management Protocol

IGP: Ionospheric Grid Point


ILS: 1. Instrument Landing System 2. Integrated Logistics Support

ILSMT: Integrated Logistics Support Management Team

ILSP: Integrated Logistics Support Plan

IM: Intermodulation

IMAS: Initial Missed Approach Segment

IMC: Instrument Meteorological Conditions

IMCS: Interim Monitor and Control Software

IMT: Integrated Management Team

IMU: Inertial Measurement Unit

INMARSAT: International Maritime Satellite Organization

INS: Inertial Navigation System

INU: Inertial Navigation Unit

IOA: Independent Operational Assessment

IOC: Initial Operational Capability

IOD: Issuance Of Data

IODC: Issurance Of Data Clock

IODE: Issurance Of Data Ephermis

IODI: Issurance Of Data Ionosphere

IODP: Issurance Of Data PRN mask

IODS: Service Issue of Date

ION: Institute of Navigation

IONO: Ionospheric Determination Processing Algorithm

IOR: Indian Ocean Region

IOS: Indian Ocean Station

IOT: Inter-Organizational Transfers

IOT&E : Independent/Integration Operational Test and Evaluation

IP: Internet Protocol

IPACG: Informal Pacific ATC Coordination Group

IPB: Illustrated Parts Breakdown

IPC: Interprocess Communication

IPDS: Integrated Product Development System

IPLT: Integrated Product Leadership Team

IPP: 1. Ionospheric Pierce Point 2. Integrated Program Plan

IPR: In Process Review

IPT: Integrated Product Team

IRD: Interface Requirements Documents

IRIS: International Radio Interferometric Surveying

IRMP: Information Resources Management Plan

IRP: Information Resources Protection

IRS: 1. Inertial Reference System 2. Interface Requirements Specification

IRT: Integrated Requirement Team

IRU: Inertial Reference Unit

IS: Intermediate-System

IS-IS: Intermediate System-Intermediate System Protocol

ISAP: Integrated Support and Acquisition Plan

ISC: Initial System Capability

ISDN: Integrated Services Data Network

ISM: In-Service Management

ISO: 1. International Organization for Standardization 2. International Standards Organization

ISP: 1. Internet Service Provider 2. Integrated Support Plan

ISPACG: Informal South Pacific ATC Coordination Group

ISR: In-Service Review

ISS: Information System Security

ISSC: Information System Security Cerifier

ISSCA: ISS Certification Agent

ISSG: Integrated Satellite Signal Generator

ISSM: Information System Security Manager

ISSP: Information System Security Plan

ISSPP: Integrated System Safety Program Plan

ISSS: Initial Sector Suite System

ISU: Initial Signal Unit

IT: Information Technology

IT&E: Integration Test and Evaluation

ITU: International Telecommunication Union

ITWS: Integrated Terminal Weather System

IV&V: Independent Verification and Validation

IVD: Ionospheric Vertical Delay

IVE: Ionospheric Vertical Error

IWAAS: Initial Wide Area Augmentation System

iWAASs: IV&V WAAS simulator

IWP: Intermediate Waypoint

Abbreviations and Acronyms Used in Technology - J

J/S: Jamming-to-Signal Power Ratio

JAI: Joint Acceptance and Inspection

JAT: Joint Acceptance Testing

JCAB: Japan Civil Aviation Bureau

JD: Julian Date

JFK: John F. Kennedy Airport, NY

JHU/APL: Johns Hopkins University Applied Physics Laboratory

JNU: Juneau AFSS

JOTFOC: Justification for Other Than Full and Open Competition

JPL: Jet Propulsion Laboratory

JPO: GPS Joint Program Office (El Segundo, CA)

JRC: Joint Resource Council

JSS: Joint Surveillance System

JST: Japanese Standard Time

JTIDS: Joint Tactical Information Distribution System

JV: (ARINC/SITA) Joint Venture

Abbreviations and Acronyms Used in Technology - K

K: Kelvin

KA: Radio Frequency Ka

KB: Kilobyte

Kbps: Kilobits per second

KCP: Kinematic Carrier Phase

KCPT: Kinematic Carrier Phase Tracking

KDD: Kokusai Denshin Denwa

KDP: Key Decision Point

Kg: Kilogram

kHz: Kilohertz

km: kilometer

KPA: Klyston Power Amplifier

Kts: Knots

Ku: Radio Frequency Ku

KVA: Kilovoltampere

Abbreviations and Acronyms Used in Technology - L

L-BAND: Frequency from 390Mhz to approximately 1.55Ghz

L1: Carrier Link Frequency 1575.42Mhz

L1: GPS Standard Positioning Service L-band ranging signal

L2: Carrier Link Frequency 1227.6 Mhz

L2: GPS Precision Positioning Service L-band ranging signal

L3: Carrier Link Frequency 1385.05 Mhz

LAAS: Local Area Augmentation System

LADGPS: Local Area Differential GPS

LAN: Local Area Network

LANE: LAN Emulation

LAPB: Link Access Procedure Balanced

LAX: Los Angeles, CA Airport

LBS: L-band Subsystem

LCC: Life Cycle Cost/Leased Common Carrier

LCCE: Life Cycle Cost

LCD: Liquid Crystal Display

LCN: 1. Logical Channel Number 2. LSA Control Number 3. Local Communications Network

LCP: Long-Term Correction Processing

LD: Low Dynamic

LDA: Localizer Directional Aid

LDGPS: Local Differential GPS

LDR: Labor Distribution Reporting

LDRCL: Low Density Radio Communications Link

LDS: Large Size Display Subsystem

LEAN: Low-Elevation Antenna Nuller

LED: Light Emitting Diode

LEO: Low Earth Orbiting

LEP: Linear Error Probable

LF: Low Frequency

LFRD: Logistics Funding Requirements Document

LGA: LaGuardia, NY Airport

LGAS: Low Ground Avionics System

LGPV: Lateral Guidance with Precision Vertical

LHC: Left Hand Circular

LIB: Local-area Integrity Broadcast

LINCS: Leased Interfacility NAS Communication System

LLC: Logical Link Control

LLWAS: Low-Level Wind shear Alert System

LNA: Low Noise Amplifier

LNAV: Lateral Navigation

LNB: Low-noise block down-converter

LO: Local Oscillator

LOA: Limited Operational Assessment

LOB: Line of Business

LOC: Location Identifier

LOE: Level of Effort

LOF: Loss of Function

LOGSA: Logistics Support Activity

LOI: Loss of Integrity

LOM: Compass Locator at ILS Outer Marker

LON: Loss of Navigation

LOP: Line Of Position

LORA: Level Of Repair Analysis

LORAN: Long Range Navigation System

LORAN-C: Long Range Navigation-C System

LORIPP: Loran Integrity Performance Panel

LOS: 1. Line Of Sight 2. Loss of Signal

LPA: Linear Power Amplifier

LPV: Localizer Performance with Vertical Guidance

LRE: Latest Revised Estimate

LRIP: Low-Rate Initial Production

LRR: Low-Range Radar

LRRAP: Long Range Resource Allocation Planning

LRU: Line Replaceable Unit

LSA: Logistics Support Analysis

LSAP: Logistics Support Analysis Plan

LSAR: Logistics Support Analysis Record

LSB: Last Significant Bit

LSB: Least Significant Bit

LSDU: Link Service Data Unit

LSR: Least Squares Residual

LSU: Long Signal Unit

LTC: Long Term Correction

LTCP: Long-Term Correction Processing

Abbreviations and Acronyms Used in Technology - M

M: More Data Bit

m: Meter

M max CT: Maintenance Maximum Corrective Time

M mean CT: Maintenance Mean Corrective Time

M&C: Monitor and Control

m/s: Meters per Second

m/s2: Meters per Second Squared

MAGR: Miniaturized Aviation GPS Receiver

MAHP: Missed Approach Holding Waypoint

MALSR: Medium Intensity Approach Lighting System with Runway Indicator Light

MAP: Missed Approach Point

MAPC: Major Acquisition Policy Council

MAPP: Major Acquisition Policy and Procedures

MAR: Major Acquisition Review

MASPS: Minimum Aviation System Performance Standards

MAWP: Missed Approach Waypoint

MaxDT: Maximum Downtime

MB: Megabyte

mbps: Millibits Per Second

Mbps: Megabits per second

MC: Multiple Carrier

MCC: Mission Control Center

MCF: Metroplex Control Facility

MCCP: Message Correction Control Part

MCDU: Multifunction Control Display Unit

Mchips: Megachips

MCP: Message Center Processor

Mcps: Mega-chips/second

MCOTS: Modified Commercial Off The Shelf

MCP: Message Center Processor

MCS: 1. Multifunction Control Station/Maritime Communications Subsystem 2. Master Control Station

MCV: Monitor C&V

MD: Medium Dynamic

MDA: Minimum Descent Altitude

M-Demo: Maintainability Demonstration

MDCRS: Meteorological Data Collection and Reporting Service

MDP: Maintenance Data Processing System

MDT: Mean Down Time

MDVP: Modification Development and Verification Plan

MEDLL: Multipath Estimating Delay Lock Loop

MESS: Message Estimation

MET: Multipath Elimination Technique

MGS: Master Ground Station

MGY-AFSS: Dayton, OH Automated Flight Service Station

MH: Message Handling

MHz: Megahertz

MIAWS: Medium Intensity Airport Weather Service

MIB: Management Information Block

Micro-EARTS: Microprocessor En Route Automated Radar Tracking System

MIJI: Meaconing, Intrusion, Jamming and Interference

MIL: Military

MIL-SPEC: Military Specification

MIL-STD: Military Standard


MIOPS: Military Operations

MIPR: Military Interdepartmental Purchase Request

MIPS: Master Integrated Program Schedule

MJD: Modified Julian Date

ML: Message Length

MLS: Microwave Landing System

MLE: Microwave Landing Engineer

mm: millimeter

mm/s: millimeter per second

mm/s2: millimeter per second squared

M/M: Maintainer/Manager

MMD: Mean Mission Duration

MMIC: Monolithic Microwave Integrated Circuit

MMP: MSAS Message Processor

MMR: Multi Mode Receiver

MNA: Mission Need Analysis

MNPS: Minimum Navigation Performance Specification

MNS: Mission Need Statement

MNT: MSAS Network Time

MO: Message Output

MOA: Memorandum Of Agreement

MOC: Management Operations

Mode-S: Mode select; discrete addressable secondary radar system with data-link

MON: Minimum Operational Network

MOP: Message Output Processing

MOPS: 1. Minimum Operations Performance Standards 2. Minimum Operational Performance Schedule

MOS: Mean Opinion Score

MOSPF: Multicast Open Shortest Path First

MOU: Memorandum Of Understanding

MOW: Maintenance-Of-Way

MP: Maintenance Plan

MPPGs: Major Procurement Program Goals

MPS: Meters Per Second

MPS: Maintenance Processor System

mr: Milliradians

MRA: Mutual Recognition Arrangement

MRD: Monitor Receiver Data

MRT: Modified Rhyme Test

ms: millisecond

MS: Monitor Station

MSA: Major System Acquisition

MSAS: MTSAT Satellite-based Augmentation System

MSB: Most Significant Bit

MSBR: Master Schedule Baseline Report

MSDP: Monitor Station Data Processor

MSE: Mean Square Error

MSEE: Master of Science, Electrical Engineering

MSG: MSAS Signal Generator

MSL: Mean Sea Level (altitude above)

MSL: Mean Sea Level

MSN: Manufacturing Sequence Numbers

MSP: Minneapolis St. Paul (Airport ID)

MSS: Master Schedule System

MSS: Mobile Satellite Service

MSSR: Monopulse Secondary Surveillance Radar

MTBCF: Mean Time Before Critical Failure

MTBCM: Mean Time Before Corrective Maintenance

MTBDE: Mean Time Before Downing Events

MTBF: Mean Time Between Failures

MTBH: Mean Time Between Hazards

MTBM: Mean Time Between Maintenance

MTBO: Mean Time Between Outages

MTBPM: Mean Time Before Preventive Maintenance

MTP: Master Test Plan

MTSAT: Multi-function Transport Satellite

MTTR: Mean Time To Repair/Mean Time To Restore

MTTRF: Mean Time To Restore Functions

MU: Management Unit

MUX: Multiplexer

MVS: Multiple Virtual System (Operating System)

MWE: Model Work Environment

mW-hr/cm2: Milliwatt hours per centimeter squared

mW/cm2: Milliwatts per centimeter-squared

Abbreviations and Acronyms Used in Technology - N

N: Newtons

N: Number of Sus in a burst

N/A: Not Applicable

N/I: Non-Intrusive

NACK: No Acknowledgement

NACO: National Aeronautical Charting Organization

NAD-27: North American Datum-1927 coordinate system

NAD-83: North American Datum-1938 coordinate system

NADIN: National Airspace Data Interchange Network

NAILS: National Airspace Integrated Logistics Support

NAILSMT: NAILS Management Team

NAK: Negative Acknowledgment

NAKRES: Negative Acknowledgment Signal and Reservation

NANU: Notice Advisory to Navstar Users

NANUS: Navigation Notices to Users

NARACS: National Radio Communications Systems

NAS: National Airspace System

NASA: National Aeronautical and Space Administration

NASISLTP: NAS Integration/System Level and Test Plan

NASIT&E: NAS Integrated Test and Evaluation

NASSRS: NAS System Requirements Specification

NAT: North Atlantic

NATCA: National Air Traffic Controller Association

NATS: National Air Traffic Services

NATSPG: North Atlantic System Planning Group

NAV: navigation

NAVAID: Navigational Aid

NAVAIR: Naval Air Systems Command

NAVSTAR: Navigation System with Timing and Ranging

NBP: New Bedford Panoramics

NC: National Center

NC: Network Connection

NCA: National Command Authority

NCC: Network Control Circuit

NCD: Network Computing Devices

NCEP: National Centers for Environmental Prediction

NCF: Network Control Facility

NCLF: National Civilian Labor Force

NCO: Number Controlled Oscillator

NCO: Numerically Controlled Oscillator

NCP: NAS Change Proposal

NCS: Network Communication Subsystem

NCS: Network Coordination Station

NCT: Network Control Terminals

NDB: Non-Directional Beacon

NDBC: National Data Buoy Center

NDI: Non-Developmental Item

NDS: 1. Non-Developmental Software/Nuclear Detonation Detection System 2. Non-Developmental Software

NE: Network Expansion

NEC: Nippon Electric Corporation

NES: Navigation Earth Station

NESDIS: National Environmental Satellite Data and Information Service

NEXCOM: Next Generation Air/Ground Communications

NEXRAD: Next Generation Radar

NFS: Network File System

NGS: 1. National Geodetic Service 2. National Geodetic Survey

NH: Northern Hemisphere

NI: Non-Interlaced

NICS: NAS Inter-facility Communications System

NIMS: NAS Infrastructure Management System

NIC: Network Information Center

NIS: Network Information System

NIST: National Institute of Science and Technology

NIU: Network Interface Unit

NLS: Network Logic Schedule

Nm: Nautical Mile

NMC: National Meteorological Center

NMS: Navigation Management System

NOAA: National Oceanic and Atmospheric Administration

NOC: Network Operations Center

NOS: National Ocean Survey

NOTAM: Notice To Airmen

NP: NES Processing CSCI

NPA: Non-Precision Approach

NPCI: Network Protocol Control Information

NPD: Navigation Payload

NPDU: Network Protocol Data Unit

NPRM: Notice of Proposed Rule Making

NPV: Non-Precision Approach with Vertical Guidance

NQSS: Network Quality of Service Subsystem

NRE: Non-Recurring Engineering

NRZ: Non-return to zero

NS: Non-Standard C/A

NSDU: Network Service Data Unit

NSE: Navigation System Error

NSEC: Nanosecond

NSI: Network Subsystem Interface

NSP: Non-Standard P-code

NSTB: National Satellite Test Bed

NSY: Non-Standard Y-code

NTE: Not To Exceed

NTP: National Transportation Policy

NTSC: National Television Standards Committee

NTT: Nippon Telegraph and Telephone

NUT: Nutation

NVREC: Navigation Recovery

NWS: National Weather Service

NWSTG: National Weather Service Telecommunications Gateway

Abbreviations and Acronyms Used in Technology - O

O&M: Operations and Maintenance

OAC: Oceanic Area Control Center

OALP: Outgoing Aeronautical Logic Procedures

OASIS: Oceanic Area System Improvement Study

OASIS: Operational and Supportability Implementation System

OATS: Office Automation Technology Services

OBI: Orbit Integration

OBS: Omni Bearing Selector

OBAD: Old But Active Data

OCA: Obstacle Clearance Area

OCC: Operations Control Center

OCD: Oceanic Clearance Delivery

OCONUS: Outside Continental United States

OCP: Obstacle Clearance Panel

OCS: Operational Control Segment

OCXO: Oversized Controlled Crystal Oscillator

OD: Orbit Determination Processing Algorithms

ODAPS: Oceanic Display and Planning System

ODC: 1. Orbit Determination Control 2. Other Direct Charges

ODE: Orbit Determination Data Editing

ODF: Oceanic Development Facility

ODG: Orbit Determination Geometry

ODR: Office of Disputes Resolution

OEAAA: Obstacle Evaluation and Airspace Assessment

OEI: O & M External Interface

OEM: Original Equipment Manufacturer

OEP: Operational Evolution Plan

OIS: Orbital Insertion Subsystem

OIS: Obstruction Identification Surface

OJT: On-the-Job Training

OLDI: On-Line Data Interchange

OM: Operations and Maintenance

OMB: Office of Management and Budget

OMC: Observed Minus Computed

OMEGA: Ground-based VLF Navigation System

OMT: Object Modeling Technique

OOOI: Out Off On In

OOS: Out Of Service

OpEval: Operational Evaluation

OPI: Office of Primary Interest

OPM: Opportunistic PM

OPR: Offices of Primary Responsibility

OPS: Operations

OPT: Organizational Performance Target

ORD: Operation Readiness Demonstration

ORD: Operational Requirements Document/Observed Range Deviations

ORDA: Open Radar Data Acquisition

ORPG: Open System Radar Generator

OS: 1. O&M Simulator 2. Operating System

OSI: Open Systems Interconnection

OSM: Oceanic Systems Manager

OSP: Operational System Parameter

OSPF: Open Shortest Path First

OST: Office of the Secretary Of Transportation

OT: Operational Testing

OTA: Other Transition Authority

OT&E: Operational Test and Evaluation

OT&E/I: OT&E Integration

OT&E/O: OT&E Operation

OT&E/S: OT&E Shakedown

OTH: Over the Horizon

OTP: Operational Test Plan

Abbreviations and Acronyms Used in Technology - P

P: Precision

P-Channel: Precision Code Channel

P-CODE: Precision Code

P-SAT: Preliminary Site Acceptance Test

P-STATIC: Precipitation Static

P/A: Parameter/Assembly

P3I: Preplanned Product Improvement

PA: Precision Approach

PAMS: Program Acquisition Management System

PANS: Procedures for Air Navigation Services

PANS-OPS: PANS Aircraft Operations

PAPI: Precision Approach Path Indicator

PAR: Precision Approach Radar

PARB: Program Assessment Review Board

PARC: Performance-Based Operations Aviation Rulemaking Committee

PASS: Professional Airways System Specialists

PAT&E: Production Acceptance Test and Evaluation

PATS: Precision Automated Tracking System

PBL: Product Baseline

PC: Personal Computer

PCA: 1. Positive Control Area/Physical Control Audit 2. Physical Configuration Audit

PCCB: Program Configuration Control Board

PCI: 1. Peripheral Component Interconnect 2. Protocol Control Information

PCM: Pulse Code Modulation

PCO: Phase Center Offset

PCR: 1. Problem Change Request 2. Problem/Change Report

PCS: Prelaunch Checkout Station

PCU: Power Conditioning Unit

PD: 1. Program Directive 2. Preliminary Design

PDC: Pre-Departure Clearance

PDF: Probability Density Functions

PDH: Productdefinition header

PDMS: Product Data Management System

PDN: Public Data Network

PDOP: 1. Position Dilution of Precision (in x, y, z) 2. Position Dilution of Precision

PDR: 1. Preliminary Design Review 2. Problem/Change Report

PDU: Protocol Data Unit

PEM: Production Engineering Trials

PEP: Program Execution Plan

PERMON: Performance Manager

PERT: Program Evaluation and Review Technique

PET: Pacific Engineering Trials

PFD: Power Flex Density

PHA: Preliminary Hazard Analysis

PHL: Preliminary Hazard List

PHMI: Probability of Hazardously Misleading Information

PHS&T: Packaging, Handling, Storage and Transportation

PID: Process Input Data

PIDS: Prime Item Development Specification

PIM: Protocol Independent Multicast

PIM-SM: Protocol Independent Multicast-Sparse Mode

PIP: Program Implementation Plan

PIREPs: Pilot Reports

PL: Pseudolite

PLL: Phase Lock Loop

PLO: Phase Locked Oscillator

PLP: Packet Layer Protocol

PLRS: Position Location and Reporting System

PM: 1. Program Manager/Phase Modulation 2. Programmer Months 3. Preventive Maintenance

PMO: Program Management Office

PMP: Program Master Plan

PMP: Performance Measurement Plan

PMR: Program Management Review

PN: Pseudo Noise

PNT: Position Navigation and Timing

PO: Performing Organization

POC: Point of Contact

POM: Program Overview Meeting

POP: Point Of Presence

POR: Pacific Ocean Region

POSIX: Point Open System Interface for UNIX

POST: Power on Self Test

PPP: Point to Point Protocol

PPPI: Pre-Planned Product Improvements

PPS: Precise Positioning Service

pps: Pulse per second

PPOS: Present Position

PPX: Parallel Packet Express

PQE: Program Quality Engineer

PQT: Preliminary Qualifications Test

PR: Procurement Request/Pseudorange

PRAP: Problem Analysis Plan

PRB: Pre-Review Board

PRC: 1. Pseudorange Correction 2. Precession

PRCf: Pseudorange Correction fast

PRD: 1. Process Receiver Data 2. Production and Deployment

PRE: Pseudorange Error

PRM: Precision Runway Monitor

PRN: Pseudo Random Noise

PROM: Programmable Read Only Memory

PRR: Program Readiness Review/Production Readiness Review

PRS: Provisioning Requirements Statement

PSAC: Plan for Software Aspects of Certification

PSAT: Preliminary Site Acceptance Test

PSE: Peculiar Support Equipment

PSI: Precise Systems, Inc.

PSK: Phase Shift Keying

PSM: Procurement Strategy Meeting

PSN: 1. Packet-Switched Network 2. Packet-Switched Network

PSR: Program Status Report

PSTN: Public Service Telephone Network

PT: Product Team

PTD: Provisioning Technical Document

PTO: Paid Time Off

PTSN: Public Switched Telephone Network

PTT: Post , Telephone and Telegraph

PTTI: Precise Time and Time Interval

PUID: Product Unique Identifier

PVC: Permanent Virtual Circuit

PVT: Positioning, Velocity and Timing

PWBS: Program Work Breakdown Structure

Abbreviations and Acronyms Used in Technology - Q

Q: Qualcomm Corporation

QA: Quality Assurance

QC: 1. Quality Controller 2. QualComm Corporation

QCPP: Quality Control Program Plan

QOS: Quality of Service

QPSK: Quadrature Phase Shift Keying

QRO: Quality and Reliability Officer

QU: Queuing Unit

QVL: Qualified Vendor List

QS: Quantity Surveyour

Abbreviations and Acronyms Used in Technology - R

R&D: Research and Development

R&M: Reliability and Maintainability

R/W: Runway

RAIM: Receiver Autonomous Integrity Monitor

RAM: Random Access Memory

RAP+ID: Reserved Alternate Path with Immediate Diversion

RAS: Resource Allocation Subcommittee

RB: Reference Burst

RCAG: Remote Communications Air-Ground

RCCB: Regional Configuration Control Board

RCE: Radio Control Equipment

RCL: Radio Communications Link

RCNSP: Required Communication, Navigation and Surveillance Performance

RCOM: Recovery Communication

RCR: Routing & Circuit Restoral

RCS: Reaction Control Subsystem

rcvr: Receiver

RD: R-channel used for Data

RD: Requirements Document

R&D: Research and Development

RDA: Radar Data Acquisition

RDP: Runway Datum Point

RDSS: Radio Determination Satellite Service

RDT&E: Research and Development Test and Evaluation

RDVS: Rapid Deployment Voice Switch

RE&D: Research Engineering and Development

REDAC: R,E&D Advisory Committee

REIL: Runway End Identifier Lights

RET: Return

RF: 1. Radio Frequency 2. Radius-turn-to-fix

RFC: 1. Reservation Forthcoming Signal 2. Request For Comment 3. River Forecast Center

RFD: Request For Deviation

RFI: Radio Frequency Interference

RFM: Radio Frequency Monitor

RFO: Request for Offer

RFP: Request For Proposal

RFU: Radio Frequency Unit

RFU: Radio Frequency Uplink Subsystem

RFW: Request For Waiver

RGCS: Review of the General Concept of Separation

RGCSP: Review of the General Concept of Separation Panel

RGD: Rate Group Data

RH: Relative Humidity

RHC: Right Hand Circular

RHCP: Right Hand Circular Polarization

RID: Review Item Discrepancy

RINEX: 1. Receiver Independent Exchange 2. Receiver Independent Exchange Format

RIP: Routing Information Protocol

RISC: Reduced Instruction Set Computer

RL: WRE LRU Simulator

RLG: Ring Laser Gyro

RLS: Reliable Link Service

RM&A: Reliability, Maintainability and Availability

RMA: Reliability, Maintainability and Availability

RMB: Risk Management Review

RMD: Removable Media Device

RMI: Radio Magnetic Interference

RMI: Radio Magnetic Indicator

RMM: Remote Maintenance Monitoring

RMMS: Remote Maintenance Monitoring System

RMP: Risk Management Plan

RMPP: Risk Management Program Plan

RMS: 1. Remote Maintenance Monitoring 2. Root Mean Square 3. Requirements Management System 4. Remote Monitoring Subsystem

RNAV: Random Navigation/Area Navigation

RNP: Required Navigation Performance

RNPC: Required Navigation Performance Capability

ROA: Request Of Assistance

ROM: 1. Read Only Memory 2. Rough Order of Magnitude

RPD: Resource Planning Data

RPG: Radar Project Generator

RPI: Research Project Initiative/Runway Point of Intercept

RPU: Receiver Processing Unit

RPV: Remotely Piloted Vehicle

RQA: Request for Acknowledge Signal

RR: 1. Repeat Request 2. Record of WRE data

RRC: Range-Rate Corrections

RS: 1. Reed Solomon 2. Remote Station 3. WRS Network Simulator

RSC: Raytheon Systems Company

RSCIP: Remote Surveillance Communications Interface Processor

Rsma: R-channel used for NSC Functions

RSPA: Research and Special Programs Administration of DOT

RSPL: Recommended (or Replacement) Spares Parts List

RSS: Root-Sum Squared

RSU: Remote Status Unit

RSVP: Resource Reservation Protocol

RTA: Required Time of Arrival

RTC: Real Time Control

RTCA: Radio Technical Commission for Aeronautics

RTCA: Requirements and Technical Concepts for Aviation

RTCA, Inc.: A not-for profit organization

RTCM: Radio Technical Commission for Maritime Service

RTG: Real Time Gipsy

RTOD: Real Time Orbit Determination

RTS: Remote Tracking System

RTX: Retransmission Message

RUC: Rapid Update Cycle

RVR: Runway Visual Range

RWP: Real-time Weather Processor

RWY: Runway

Rx: Receiver

Abbreviations and Acronyms Used in Technology - S

SICAS: SSR Improvements and Collision Avoidance System

SICASP: SSR Improvements and Collision Avoidance System Panel

SID: Standard Instrument Departure

SIG: (Telephony) Signaling Process

SIGGEN: Signal Generator

SIIR: Specification Issue Identification and Resolution

SIR: Screening Information Request

SIS: Signal-In-Space

SIT: 1. System Integration Test 2. System Integration Testing

SJU: San Juan Airport

SL: Safety Level

SLEP: Service Life Extension Program

SLOC: Software Lines of Code

SLOC: Source Line Of code

SLR: Satellite Laser Ranging

SLS: System Level Specification

SM: 1. Space Mode 2. Solar-Magnetic

SMC: System Management and Communication

SMGCP: Surface Movement and Guidance Plan

SMI: Select and Monitor Input Data Source

SMIT: System Management Interface Tool

SMO: System Management Office

SMIR: Software Management Indicators Report

SMP: Schedule Message Processing

SMS: Service Monitoring System


SN: Sub Network

SNAPIT: Satellite Navigation Automated Program Information Tool

SNMP: Simple Network Management Protocol

SNR: Signal-to-Noise Ratio

SNUG: Satellite Navigation Users Group

SNTB: Satellite Navigation Test Bed

SOA: Service Order Agreement

SOATRF: Start Of Aircraft Transmit Reporting Frame

SOATTFC: Start Of Aircraft Transmit Terminal Control Frame

SOD: Satellite Orbit Determination

SOH: State Of Health

SOIT: Satellite Operational Implementation Team

SOITDF: Start Of Inbound Transmit Data Frame

SOITMF: Start Of Inbound Transmit Master Frame

SOO: Satellite Operations Officer

SORD: System Operational Requirements Document

SORDF: Start Of Receive Data Frame

SORMF: Start Of Receive Master Frame

SORSF: Start Of Receive Super Frame

SOT: Solid Earth Tides

SOW: Statement Of Work

SP: Safety Processor

SPA: System Performance Assessment

SPB: Site Program Bulletin

SPD: Software Product Specification

SPEC: Specification

SPEC: Standard Performance Evaluation Corporation

SPI: 1. Schedule Performance Index 2. System Performance and Integrity

SPIR: Site Preparation Installation Report

SPIT: Software Process Improvement Team

SPIT: Satellite Procedures Implementation Team

SPITE: Switching Processing Interface Telephony Event

SPO: Satellite Program Office

SPR: Software Problem Report

SPROCET: Safety Process Engineering Team

SPS: 1. Standard Positioning Service 2. Software Product Specification

sps: Symbols per second

SQA: Software Quality Assurance

SQM: Signal Quality Monitor

SRAM: System Requirements Allocation Matrix.

SRB: Specification Review Board

SRCA: Safety Requirements Criteria Analysis

SRM: System Resource Monitor

SRR: 1. Software Requirements Review 2. System Requirements Review

SRS: Software Requirements Specification

SS: 1. Space Segment/Structure Subsystem 2. System Specification

SSALR: Simplified Short Approach Lighting System with Runway Alignment

SSC: Software Support Center

SSDD: System/Segment Design Document

SSEI: Systems Software Engineering Issues

SSG: Satellite Signal Generator

SSNL: Satellite Sub-Network Layer

SSO: Source Selection Officer

SSP: 1. Source Selection Plan 2. System Safety Program

SSPP: System Safety Program Plan

SSPPR: System Safety Program Progress Report

SSR: 1. Secondary Surveillance Radar/System Spec Review 2. Software Specification Review

SSS: Satellite Signal Simulator

SSU: Subsequent Signal Unit

SSWG: 1. Separation Standards Working Group 2. System Safety Working Group

ST: Singapore Telecom

ST-2: Internet Streams Protocol, Version 2

STACK: Last-in; First Out Holding Buffer

STAR: Standard Terminal Arrival Route

STARS: Standard Terminal Automation Replacement System

STB: Site Technical Board/Satellite Test Bed

STC: Supplemental Type Certificate

STD: 1. Standard 2. Software Test Description

STEL: Stanford Telecom

STF: System Test Facility

STLDD: Software Top level Design Document

STP: Software Test Plan

STR: 1. Software Test Report 2. Software Trouble Report

SUA: Special Use Airspace

SU: Soviet Union/Signal Unit

SUM: Softwares Users Manual

SV: 1. Space Vehicle 2. Satellite Vehicle

SVC: Service

SVGA: Superior Video Graphics Adapter

SVM: Service Volume Model

SVP: Software Verification Plan

SW: Software

SWG: Software Working Group/Satellite Working Group

Abbreviations and Acronyms Used in Technology - T

T&E: Test and Evaluation

T&M: Time and Materials

T&R: Translated and Rotated

TAC: Technical Assistance Contract

TACAN: Tactical Air Navigation

TAE: Transportation Acquisition Executive

TAI: International Atomic Time (Temps Atomique International)

TAM: Transportation Acquisition Manual

TASA: Task and Skills Analysis

TAV: Time to Alarm Validation

TBD: To Be Determined

TBP: To Be Provided

TBR: To Be Resolved

TBS: To Be Supplied

TC: 1. Type Certification 2. Tropospheric Correction 3. Terrestrial Communications

TCAS: Traffic Air Alert Collision Avoidance System

TCC: Terminal Control Circuit

TCCC: Tower Control Computer Complex

TCH: Threshold Crossing Height

TCN: Terrestrial Communications Network

TCP: 1. Transmission Control Protocol 2. Threshold Crossing Point

TCPI: To Complete Performance Index

TCS: 1. Terrestrial Communications System 2. Thermal Control Subsystem

TD: Time Difference/technical Director

TDB: Barycentric Dynamic Time (Temps Dynamique Barycentrique)

TDLS: Tower Data-Link Service

TDM: Time Division Multiplex

TDMA: Time Division Multiple Access

TDOF: Two Degrees Of Freedom

TDOP: Time Dilution Of Precision

TDP: Technical Data Package

TDRSS: Tracking and Data Relay Satellite System

TDS: Time Distribution Subsystem

TDT: Terrestrial Dynamic time (Temps Dynamique Terrestre)

TDWR: Terminal Doppler Weather Radar

TDZ: Touchdown Zone

T/PS: Technical Engineering and Program Support

TEA: Test, Evaluation and Acceptance

TEC: Total Electron Content

TEI: Transformation from ECEF to Geocentric Inertial Coordinate System

TELNET: Network Terminal Protocol

TEMP: Test and Evaluation Master Plan

TERPS: Terminal Instrument Procedures Standards

TET: Technical Evaluation Team

TEWG: Test and Evaluation Working Group

TF: To-From

TFTP: Trivial File Transfer Protocol

TGT: Technical Guidance Team

THR: Threshold

TIA: Type Inspection Authorization

TIB: 1. Technical Instruction Book 2. Technical Information Book

TIM: Technical Interchange Meeting

TIP: Threat Image Projection

TIS: Traffic Information Service

TIWG: Test Integration Working Group

TKE: Track Angle Error

TLI: Transport Layer Interface

TLS: Target Level-of-Safety

TLS: Transponder Landing System

TLT: Tracking, Telemetry and Control

TMC: Technical Management Committee

TMS: Testbed Master Station

TNDD: Terrestrial Network Design Document

TNIFR: Terminal Navigation Instrument Flight Rules

TO: Technical Officer

TOA: Time Of Applicability

TOC: Table Of Contents

TOD: Time Of Day; Top of Descent

TOR: Technical On-site Representative

TOW: Time Of Week

TOU: Time of Year

TPI: Technical Performance Index

TPM: Technical Performance Measurement

TPP: Technical Performance Parameter

TPRC: Test Policy Review Committee

TPS: 1. Transport Protocol Selector 2. Test Program Set

TR: Test Run Scenario

TRACON: Terminal Radar Approach Control

TRB: Technical Review Board

TRD: Test Requirements Document

TRDRE: Terminal Radar Digitize, Replacement & Establish

TRO: Troposphere

TRP: Troposphere Parameters

TRR: Test Readiness Review

TRS: TDMA Reservation Synchronizer (Block and Process)

TSARC: Transportation System Acquisition Review Council

TSE: Total System Error

TSO: Technical Standard Order

TSPI: Time-Space Position Indicator

TSS: 1. Test Support Software 2. Test Support System

TT&C: Tracking, Telemetry and Control

TTA: 1. Time-To-Alarm 2. Time to Alert

TTAC: Test Tube Advisory Committee

TTFF: Time To First Fix

TTL: 1. Transistor Logic 2. Transistor Transistor Logic

TTSF: Time To Subsequent Fix

TUP: Telephone User Part of CCITT Signaling System #7

TVSR: Terminal Voice Switch Replacement

TWIP: Terminal Weather Information for Pilots

Tx: Transmitter

TXSU(N): Process for Transportation of a burst of N sus (block TTP)

Abbreviations and Acronyms Used in Technology - U

U/L: Up Link

UD: User Data

UDC: Compute UDRE Range Difference

UDP: 1. User Datagram Protocol 2. User Diagram Protocol

UDR: Compute UDRE

UDRE: User Differential Range Error

UDRE: User Differential Range Estimate

UDREI: User Differential Range Estimate Indicator

UE: User Equipment

UEN: Upper, East, North

UERE: User Equivalent Range Error

UETF: User Equipment Test Facility

UHF: Ultra High Frequency (470 890 MHz)

UHNE: User Horizontal Navigation Error

UFIR: Upper Flight Information Region

UIVE: User Ionoshperic Vertical Error

UL: Underwriters Laboratories

UNDGEN: Upload Navigation Data Generator

UP: User Data Process (Network Layer)

UPC: User Position Computation

UPM: 1. User Position Monitor 2. UT1 and Polar Motion

UPS: Uninterruptible Power Supply

URA: User Range Accuracy

URE: User Range Error

URSI: International Radio Science Union

US: United States

USAF: United States Air Force

U.S.C.: United States Code

USCG: United States Coast Guard

USGS: United States Geological Survey

USN: U.S. Navy

USNO: United States Naval Observatory

UTC: Universal Time Coordinated

UTP: Unshielded Twisted Pair

UUT: Unit Under Test

UW: Unique Word

Abbreviations and Acronyms Used in Technology - V

VAC: Volts Alternating Current

VAL: Vertical Alert Limit

VASI: Visual Approach Slope Indicator

V&V: Verification and Validation

VCO: Voltage Controlled Oscillator

VDD: Version Description Document

VDC: Volts Direct Current

VDL: VHF Data Link

VDOP: Vertical Dilution Of Precision

VE: Vertical Error

VECP: Value Engineering Change Proposal

VEG: Verify External GIVE

VERN: VHF Extended Range Network

VFC: Verify Fast Corrections

VFWG: Vertical Flight Working Group

VHF: Very High Frequency

VHP: Vertical host Processor

VFR: Visual Flight Rules

VGA: Video Graphics Adapter

VGN: Verify GEO Navigation Data

VHF: Very High Frequency (54 to 216 MHz)

VIC: Verify Ionospheric Corrections

VID: Vendor Item Drawing

VIS: Visible

VLBI: Very Long Baseline Interferometry

VLF: Very Low Frequency

VLT: Verify Long-Term Corrections

VMC: Visual Meteorological Conditions

VME: Versa Module Euro Card

VNAV: Vertical Navigation

VOR: Very High Frequency Omnidirectional Ranging

VORTAC: 1. Combined VOR and TACAN 2. VHF Omni Range/Tactical Air Navigation

VPE: Vertical Position Error

VPET: Vertical Position Error Threshold

VPL: Vertical Protection Level

VPN: Virtual Private Network

VRRP: Voice Recorder Replacement Program

VRTM: Verification Requirements Traceability Matrix

VRTX: Virtual Real Time Executive

VS: versus

VSBP: Voice Switch By-Pas

VSWR: Voltage Standing Wave Radio

VTF: Vector-to-Final (Approach)

VVASI: VASI Visual Approach Slope Indicator

VUL: Vertical Uncertainty Level

Abbreviations and Acronyms Used in Technology - W

W: Watts

W/S: Workstation

WA: Washington

WAAS: Wide-Area Augmentation System

WAD: Work Authorization and Delegation

WADGPS: Wide Area Differential GPS

WAN: Wide Area Network

WARP: Weather and Radar Processor

WBS: Work Breakdown Structure

WCRB: WAAS Configuration Review Board

WCRP: WAAS Change Request Process

WD: Weather Data Collector

WDGPS: Wide-area Differential Global Positioning System

WDM: Wave Division Multiplex

WDOP: Weighted Dilution Of Precision

WEI: WAAS External Interface

WFO: Weather Forecast Office

WGO: WNT to GPS Offsets

WGS-72: World Geodedic Survey 1972

WGS: World Geodedic Survey

WGS-84: World Deodedic System-1984 Coordinate System

WIB: Wide-area Integrity Broadcast

WIF: WAAS Interface

WIM: Wide-area Integrity Monitor

WIP: Work In Progress

WIPP: WAAS Integrity Performance Panel

WIS: WAAS Ionospheric SW

WJHTC: William J. Hughes Technical Center

WLF: WNT Linear Fit

WMO: World Meteorological Organization

WMP: WAAS Message Processor

WMS: Wide-Area Master Station

WMS_H: Wide-area Master Station HWCI

WN: Week Number

WNT: WAAS Network Time

WNTT: WAAS Network Time Tag

WOB: Women Owned Business

WORM: WAAS Obsolescence and Refresh Methodology

WP: Waypoint

WPPS: Work Package Planning Sheets

WRE: 1. WAAS Reference Element 2. Wide Area Reference Equipment

WRS: Wide Area Reference Station

WRS_H: Wide-Area Reference Station HWCI

WRT: With Respect To

WSG: WAAS Signal Generator

WSM: Wide area System Monitor

WSP: Weather Systems Processor

WTMS: WAAS Training and Maintenance Systems

WUPS: WAAS User Position Solution

WV: Water vapor

WX: Weather

Abbreviations and Acronyms Used in Technology - X

XOR: Exclusive-or

Abbreviations and Acronyms Used in Technology - Y

Y-code: Encrypted DoD Information on L2

Abbreviations and Acronyms Used in Technology - Z

Z: Zulu time

ZAB: Albuquerque Area ARTCC (Albuquerque, NM)

ZAN: Anchorage Area ARTTC (Anchorage, AK)

ZAU: Chicago Area ARTTC (Aurora, IL)

ZBW: Boston Area ARTCC (Nashua, NH)

ZDC: Washington Area ARTTC (Leesburg, VA)

ZDV: Denver Area ARTTC (Longmont, CO)

ZFW: Fort Worth Area ARTCC (Euless, TX)

HNL: Honolulu Area ARTCC (Honolulu, HI)

ZHU: Houston Area ARTTC (Houston, TX)

ZJX: Hillard Area ARTCC (Hillard, FL)

ZKC: Kansas City Area ARTCC (Olathe, KS)

ZLA: Los Angeles Area ARTCC (Palmdale, CA)

ZLC: Salt Lake City Area ARTCC (Salt Lake City, UT)

ZMA: Miami Area ARTCC (Miami, FL)

ZME: Memphis Area ARTCC (Memphis, TN)

ZMP: Farmington Area ARTCC (Farmington, MN)

ZNY: New York Area ARTCC (Ronkonkoma, NY)

ZOA: Oakland Area ARTTC (Fremont, CA)

ZOB: Oberlin Area ARTTC (Oberlin, OH)

ZSE: Seattle Area ARTCC (Seattle, WA)

ZSU: San Juan Area ARTTC (San Juan, Puerto Rico)

ZTL: Atlanta Area ARTCC (Hampton, GA)

2DRMS: 2 x Distance Root Mean Square



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