gps knowledge

Here are some abbreviations you’ll see when you are reading about a GPS receivers, navigators, handhelds, etc…

WAAS – Wide Area Augmentation System

SA – Selective Availability

TMC – Traffic Message Channel

NMEA (0183 Standard) – National Marine Electronics Association

DMB – Digital Multimedia Broadcasting

TTFF – Time To First Fix

TPEG – Transport Protocol Experts Group

A-GPS – Assisted GPS

DR – Dead Reckoning