Acronym

Definition

ACC

Accelerometer

AEL

Accessible Emission Limit

AGC

Automatic Gain Control

ASNT

America Society for Nondestructive Testing

AVI

Audio Video Interleave

CCD

Charge Coupled Device

CMOS

Complementary Metal Oxide Semiconductor

CPU

Central Processing Unit

CSV

Comma Separated Value

CTLU

Console and Train Localization Unit

DAC

Distance Amplitude Correction

DGPS

Differential GPS

DSP

Digital Signal Processing

DVD

Digital Video Disk

DXF

Drawing Exchange Format

EMC

Electro Magnetic Compatibility

FOV

Field of View

FPGA

Field Programmable Gate Array

GIS

Geographic Information System

GPS

Global Positioning System

GPU

Graphics Processing Unit

GUI

Graphical User Interface

GUM

Guide to the expression of uncertainty in measurement

HRT

Hi Rail Track

HTML

HyperText Markup Language

IEC

International Electrotechnical Commission

IMU

Inertial Measurement Unit

ISO

International Standard Organization

LAN

Local Area Network

LASER

Light Amplification By Stimulated Emission Of Radiation

LCD

Liquid Cristal Display

LED

Light-Emitting Diode

LER

Lack of Expected Response

LRU

Line Replaceable Unit

MEMS

Micro Electro-Mechanical Systems

MPE

Maximum Permissible Exposure

MTBF

Mean Time Between Failures

MTBM

Mean Time Distance Between Maintenance

MTTM

Mean Time To Maintain

NOHD

Nominal Ocular Hazard Distance

OHL

Over head Line

OHLMS

Over head Line Measuring System

PCI

Personal computer Inteface

RCAU

Rail Corrugation Acquisition Unit

RCC

Rail Corrugation Computer

RCDU

Rail Corrugation Detection Units

RCMS

Rail Corrugation Measuring System

RCR

Rail Corrugation Rack

RFD

Rail Flaw Detection

RFT

Request for tender

RIO

Reconfigurable Input Output (National Instruments)

RMS

Root Mean Square

RNDA

Railway Network Data Archive

RPPU

rail profile processing unit

RQMS

Ride Quality Measuring System

RTL

Voltage line detector

TCG

Time Corrected Gain Control

TCP/IP

Transmission Control Protocol /Internet Protocol

TGMS

Track Geometry Measurement System

TGPU

track geometry processing unit

TLS

Train Localization System

TTL

Transistor Transistor Logic

TVSS

Track Video Surveillance System

UIC

Union Chemin de Fer

UPS

Uninterruptible power supply

UTC

Coordinated Universal Time

VDC

Voltage in Alternating Current

VDM

Vehicle Dynamic Measurement

VIM

International Vocabulary of Metrology

VSH

Vertical Split Head

WGS

World Geodetic System