• Advanced Research Corporation - Company based in Oregon, USA providing engineering and consulting services specializing in global navigation satellite systems (GNSS) technologies and other positioning, navigation and timing (PNT) systems.
• Cetus GPS - Navigation, tracking and field data collection software for PalmOS handhelds.
• Chartracer Software - Cartographic Software is for making moving maps on which GPS data from a serial port are plotted. Data are tracked remotely via CDPD modems and internet sites.
• GENESIS - Suite of data services that brings together the new Earth science products to be produced by spaceborne Global Positioning System (GPS) receivers. It serves mainly as a database for GPS occultation observations.
• GPS ActiveX - Download information into a Visual Basic application or web page. Garmin, Magellan, Navman or any NMEA 0183 enabled GPS supported. UTM, SPCS, British National Grid, and most other national coordinate systems supported. [Windows and Pocket PC].
• GPS Discounts for Educators - GPS special pricing for Trimble GeoExplorer 3 and ProXR/XRS educator kits. GPS education and training courses. Tutorials to learn about the GPS system. GPS consulting and course development.
• GPS Drawing - A collection of drawings made with GPS data logging devices.
• GPS Forums - Technical and consumer discussion on GPS technology.
• GPS Information - Mehaffey, Yeazel and DePriest's site provides dozens of reviews and technical articles on GPS receivers and software, and a huge list of links.
• GPS Kwajalein - GPS Ground Station on Kwajalein Island, photographs of the island and site. Links to others GPS sites.
• GPS Precise Orbits - Global Positioning System satellite ephemerides ("orbits") information for the general public, from US NOAA. GPS precise orbits are derived using 24 hour data segments from the global GPS network. An informational summary file is provided to document the computation and to convey relevant information about the observed satellites, such as maneuvers or maintenance. Orbits generally are available 2 to 6 days after the observation.
• GPS Site from Univ of Texas - Global positioning system overview and bibliography.