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GPS (Global Positioning System) consists of 24 satellites in orbit. With appropriate receiving equipment the system can be used to determine geographical co-ordinates such as position and height. There are many uses of GPS including navigation, mapping, surveying, and monitoring. This Open Directory Category is for GPS sites that relate to Geomantics, that is the study and measurement of the physical environment of the earth.

Consumer_Information@	Manufacturers@
PalmPilot@	Precision_Farming@
Shopping@	Location and Tracking
Education	Guides
Marine and Aviation	Navigation
Space	Vehicle_Tracking@
NewsGroup (Usenet)

• Australian Global Positioning Systems Society A free membership society to bring together the delegates, sponsors, and exhibitors for the Satellite Navigation Conference and to foster, develop, and assist the Global Positioning System disciplines.
• 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.
• David L. Wilson's GPS Accuracy Web Page Global Positioning System Accuracy
• Emily Programme A system study researching the coupling of terrestrial positioning and the satellite-based positioning.
• Emily Programme Project funded by the European Commission to define and develop a chipset performing the hybridization of GSM/GPRS/UMTS positioning (E-OTD) and GPS/GNSS positioning.
• 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.
• GIS Services Specializes in ArcView GIS training and provides commodities, services and training for implementing and integrating solutions with GIS, GPS, AVL, internet mapping and satellite imagery.
• 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 ActiveX Get GPS information into your 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 Applications Exchange Offer global overview of GPS applications and users communities.
• GPS Applications Exchange GPS technology usage world-wide is featured. GPS application stories are accessed by geographic regions. GPS tutorials are available to enhance understanding.
• GPS by Globespotter GPS education, news, hardware, software, and links. Digital mapping.
• GPS Clocks for Computer Time Synchronization Learn about how to use GPS for computer time synchronization. We offer a GPSClock (for computer use) that's accurate to a millionth of a second. Ideal for running a stratum one NTP server.
• GPS Control Base Station on Internet GPS Base Stations located in New Zealand, Australia, and New Guinea. Download GPS data files for $40-$70 per day.
• GPS Deformation Monitoring Objective is the development of a system for rapid and inexpensive monitoring of unstable slopes, such as pit walls, earth\rock slopes and dam walls using global satellite positioning technology.
• 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 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.
• GPS Status Information from US Naval Observatory Via ftp.
• Hyperbolic Positioning Algorithm An algorithm for obtaining an exact solution for the three dimensional location of a mobile given the locations of four fixed stations (like a GPS satellite or a base station in a cell) and the signal time of arrival (TOA) from the mobile to each station. From Ralph Bucher.
• Internet-based Global Differential GPS C-language software package for GPS-based real-time positioning and orbit determination. Includes system overview, technical papers, and a live demo .
• Outdoor Gear Reviews GPS receiver comparisons.
• RLA GeoSystems Source for GPS information and training. Trimble ProXRS and GeoExplorer3 receivers, top 10 websites, GPS for educators and free help.
• Satellite Navigation and Positioning Group (SNAP) SNAP is Australia's largest academic GPS research group specialising in high precision GPS technology and applications.
• Septentrio Satellite Navigation Dual frequency GPS & GLONASS, as well as EGNOS, WAAS and MSAT based on an in-house single baseband processor.
• The Global Positioning System: The History of GPS The history and story of how the Global Positioning System evolved from the development of the world's most accurate timepieces, atomic clocks, by physicists looking into the nature of time. Adapted from an article written by MIT scientist Daniel Kleppner.
• The GPS Waypoint Base Non-commercial project allowing the collection or submission of GPS waypoints.
• The National GPS Network Resource from the UK Government intended for GPS-equipped surveyors, and Geographic Information Systems (GIS) developers who work with Ordnance Survey (OS) mapping. Includes the Passive Station Database, Active Station RINEX Data, and Coordinate Converter services.
• Travel by GPS Downloadable free GPS maps for travel adventures, self-guided tours, and outdoor activities. Map data includes waypoints and routes for use with handheld GPS and car navigation systems.
• U.S. Coast Guard Navigation Center This site is maintained for the purpose of disseminating navigational status information for the GPS, DGPS, and LORAN radio navigation systems. Site includes, coverage plot map, DGPS status, discusses nationwide expansion, outages, and general information relevant to precision agriculture.
• US Coast Guard Navigation Center News, updates and advisories. Links to local US Coast Guards sites. Downloadable publications.
• USCG Navigation Center GPS, DGPS, LORAN-C, OMEGA, navigation systems, GPS navigation, DGPS navigation.
• USCG Navigation Center Alexandria, VA Provides the latest GPS and DGPS outage information, navigation forums, almanacs and local notices to mariners.
• Wayhoo.com Database of geographical waypoint information and utilities for GPS/GIS users.
• Wing Way Systems Navigation-Wonder, a shareware GPS mapping navigation software including voice response system [Windows].

 

 

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