NationalMeteorological.com

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.
www.gps-society.org/

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.
www.beyonddiscovery.org/

Satellite Navigation and Positioning Group (SNAP)
SNAP is Australia's largest academic GPS research group specialising in high precision GPS technology and applications.
www.gmat.unsw.edu.au/

Global Positioning Systems
Offers GPS systems for outdoor recreation, avionic and automotive. Features general GPS information and a glossary of technical terms.
www.globalpositioningsystems.co.uk/

How Stuff Works: Global Positioning System Receivers
Explanation of Global Positioning System (GPS) receivers.
www.howstuffworks.com/

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.
ralph.bucher.home.att.net/

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 .
gipsy.jpl.nasa.gov/

Positioning Resources
Software which allows users to take GIS maps out into the field and create accurate, geographically referenced records on the spot.
www.posres.co.uk/

Positioning Solutions
Sells GPS navigation hardware/software bundles for most types of PDAs. Provides Palm OS and Pocket PC bundles.
www.positioningsolutions.com/

Palm Computing Center Lausanne
GPS systems for Palm OS PDA and PocketPC handhelds with MapViewer maps for both systems.
www.palmcomp.ch/