|
A |
B |
C |
D |
E |
G |
H |
I |
L |
M |
N |
P |
R |
S |
T |
U |
V |
W |
X |
|---|
| |
| A |
| A-GPS |
Assisted GPS |
| AVL |
Automotive Vehicle Location |
| B |
| BPSK |
Bi-Phase Switched keyed |
| C |
| C/A |
Course/Acquisition (code) |
| CDI |
Course Deviation Indicator |
| CDMA |
Code Division Multiple Access (see also TDMA) |
| CGI |
Common Gateway Interface |
| CMG |
Course Made Good |
| COG |
Course Over Ground |
| D |
| DGPS |
Differential GPS |
| DoD |
The United States Department of Defense. (which manages and controls the GPS) |
| DOP |
Dilution Of Precision |
| DR |
Dead Reckoning |
| DTK |
Desired Track |
| E |
| E-CGI |
Enhanced Cell Global Identity |
| EGNOS |
European Geostationary Navigation Overlay System |
| E-OTD |
Enhanced Observed Time Difference |
| EPE |
Estimated Position Error |
| EPSRC |
Engineering & Physical Science Research Council |
| ETA |
Estimated Time Of Arrival |
| ETE |
Estimated Time Enroute |
| G |
| GAST |
Greenwich Sidereal Time Angle |
| GDOP |
Geometric DOP |
| GEO |
Geostationary or Geosynchronous Earth Orbit (See also LEO & MEO) |
| GGA |
An NMEA message |
| GIS |
Geographic Information System |
| GNSS |
Global Navigation Satellite System |
| GPRS |
Generalized Packet Radio Service. (A GSM-based packet data protocol) |
| GPS |
Global Positioning System |
| GSA |
An NMEA message |
| GSM |
Global System for Mobile Communications (See also TDMA, CDMA, and PCS) |
| GSV |
An NMEA message |
| H |
| HDOP |
Horizontal DOP |
| I |
| ITAR |
International Traffic in ARMS Regulations |
| ITS |
Intelligent Transport Systems (eg fm Signav) |
| L |
| L1 |
L1 Frequency - 1575.42 MHz. - one of the two radio frequencies transmitted by the GPS satellites. This frequency carries the Coarse Acquisition Code (C/A code), P-Code, and the nav message. |
| L2 |
L2 Frequency - 1227.6 MHz - one of the two radio frequencies transmitted by the GPS satellites. This frequency carries only the P-Code. |
| L3 |
Level 3 frequency |
| L5 |
Level 5 frequency - 1176.45 MHz - additional frequency used on new ?Block IIF' satellites, intended for civilian applications in air traffic control. |
| LAAS |
Local Area Augmentation System |
| LEO |
Low Earth Orbiting (satellites) (See also GEO and MEO) |
| LNA |
Low noise amplifier |
| LORAN |
Long Range Navigation |
| M |
| MEO |
Medium Earth Orbit (satellites) (See also GEO and LEO) |
| MS |
Mobile system (eg. cellphone network) |
| MSAS |
MTSAT Satellite based Augmentation System (See also WAAS, EGNOS) |
| MTSAT |
Multi-Task Satellite system |
| N |
| NAVSTAR |
Navigation Satellite Timing and Ranging. (The official U.S. Government name given to the GPS satellite system) |
| NMEA |
National Marine Electronics Association (A U.S. standards committee that defines data message structure, contents, and protocols to allow the GPS receiver to communicate with other pieces of electronic equipment.) |
| P |
| PCS |
Personal Communications Services |
| PDOP |
Position DOP |
| PPS |
Precise Positioning Service (see also SPS). The GPS service provided for the US military usage. |
| PRN |
Pseudo Random Noise |
| R |
| RAIM |
Receiver Autonomous Integrity Monitoring |
| RMC |
An NMEA message |
| RTCA |
Radio Technical Commission for Aeronautics (For WAAS & EGNOS services) |
| RTCM |
Radio Technical Commission For Maritime Services (Special Committee 104 - A committee created for the purposes of establishing standards and guidance for interfacing between radio beacon-based data links and GPS receivers, and to provide standards for ground-based differential GPS stations. ) |
| RTK |
Realtime Kinematic |
| S |
| SA |
Selective Access or Selective Availability (SA) |
| SOG |
Speed over Ground. (The actual speed the GPS unit is moving over the ground) |
| SD |
Secure Digital (Flash memory) |
| SMS |
Short Message System |
| SPS |
Standard Positioning Service (see also PPS) |
| SV |
Space Vehicle |
| T |
| TDMA |
Time Division Multiple Access. (See also CDMA) |
| TDOP |
Time clock offset |
| TTFF |
Time to First Fix |
| TRK |
Track. Direction of travel relative to a ground position (same as Course Over Ground) |
| TRN |
Turn. The degrees which must be added to or subtracted from the current heading to reach the course to the intended waypoint. |
| U |
| UTC |
Coordinated Universal Time |
| UTM |
Universal Transverse Mercator. An almost worldwide coordinate projection system using north and east distance measurements from reference point(s). UTM is the primary coordinate system used on U.S. Geological Survey topographic maps. |
| V |
| VDOP |
Vertical DOP |
| VMG |
Velocity Made Good. The rate of closure to a destination based upon your current speed and course. |
| VTG |
An NMEA message |
| W |
| WAG |
Wireless Assisted-GPS |
| WAAS |
Wide Area Augmentation Signal |
| WGS84 |
World Geodetic Reference 1984 |
| X |
| XTE |
Crosstrack Error (XTE/XTK) |
| XTK |
Crosstrack Error (XTE/XTK) |
