GPS

Inexpensive GPS mobile Antenna - An inexpensive external GPS antenna, for 1.5 GHz band for GPS receiver, If you operate APRS or just need an external antenna for your GPS receiver, here’s one that is easy to build yet offers surprisingly good performance in a compact size. Best of all, it uses commonly available components and materials.

Antenna Specialists  ^pop - Land Mobile, CB and scanner antennas, GPS, 800 and 900 Mhz antennas

Kantronics - Kantronics produce Modems, Tnc, Kam, Marine, wireless modems. Packet radio communication devices, HF E-mail, paging, GPS tracking, weather data gathering, or wireless data transmission.

Tigertronics, Inc. - Packet/telemetry modems, GPS tracking, sound card interfaces

Laipac Technology Inc. - We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Adventures in GPS antenna construction - Adventures in amplified GPS antenna construction; an experiment

Handling GPS Antenna - Installation guidelines for static GPS Antennas

Global Positioning System Primer - Welcome to the Global Positioning System (GPS) What is GPS? What is Navigation? GPS Elements Satellites in Space Ground Control Stations and Receivers, How GPS Works - An Amazing System, Military Uses for GPS

GPS Time Series - The Global Positioning System (GPS) is a constellation of 24 satellites which is used for navigation and precise geodetic position measurements.

Navstar GPS - GPS signal characteristics, system time, system segments, frequencies

Maps and GPS Info - GPS information and thorough product reviews

Visual UK Amateur Radio Repeater Map - A google map of the UK amateur radio repeaters with clickable information

SPRE Home Page - The Spartan Packet Radio Experiment (SPRE) is an Amateur Radio (Ham radio) communications experiment. The primary mission was to test satellite tracking using amateur packet radio and Global Positioning System (GPS). SPRE was developed and built by the University of Maryland Amateur Radio Association (UMARA) with assistance from NASA, volunteer engineers, and volunteer software professionals.

NAVSTAR GPS Timing Operations - NAVSTAR GPS Timing Operations, USNO GPS Data & Information Files Global Positioning System Overview Current GPS Constellation, GPS Time Transfer Operations, GPS & Glonass Satellite Visibility

Truckcity CB and GPS Store - CB Radio shop, repair service

A.R.S. Elopta B.V - Motorola dealer , garmin GPS , cb, HAM radio , radio rental ,portofoon verhuur , walkie talkie located in Amsterdam , Holland

Waters & Stanton - Suppliers of Amateur Radio equipment, GPS, Marine, Aeronautical, SRBR and a host of leisure related products.

Elettronica Turrisi - TRasceivers HF-VHF-UHF, repeaters, GPS, antennas, based in italy

UI-VIEW  ^pop - UI-VIEW APRS Style Complete software package. High Resolution maps and multiple TNC Support GPS input

MacAPRS - Macintosh automatic position reporting system, developed by Bob Bruninga, WB4APR, to track boats and vehicles using GPS and packet radio. MacAPRS was written by Keith Sproul, WU2Z and Mark Sproul, KB2ICI

SA Watch - SA Watch allows you to monitor and analyze the wandering that your GPS receiver appears to do when it is at a fixed location

X-APRS - APRS™ for Linux is a multifaceted system for use with packet radio by Hams, it allows the monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and much much more. It envolves mapping, GPS tracking, packet radio, etc

MacGPS Pro - Mapping software which links a Garmin GPS receiver to your Macintosh. Includes Maidenhead grid squares and beam-pointing maps.

Beam Aim - Draws a world map centered on your QTH. Type in a DX station's call sign to get the beam aim azimuth and distance to the station.

APRS Tracker - A near-copy of the PIC-E running the GPS-2E firmware