The GPS system was designed by and is controlled by the United States Department of Defense and can be used by anyone, free of charge. The GPS system is divided into three segments: space, control, and user. The space segment comprises the GPS satellite constellation. The control segment comprises ground stations around the world that are responsible for monitoring the flight paths of the GPS satellites, synchronizing the satellites' onboard atomic clocks, and uploading data for transmission by the satellites. The user segment consists of GPS receivers used for both military and civilian applications. A GPS receiver decodes time signal transmissions from multiple satellites and calculates its position by trilateration.
Rick Moody on His ‘Undependable Global Positioning System’
During Frieze New York, VIPs given access to the fair’s courtesy BMWs had a chance to hear a sound piece by Rick Moody called The Undependable Global Positioning System inside the fair which is pretty much what its title suggests: a robotic voice—similar to one that would provide directions on a GPS system—reciting the text of Mr. Moody’s story of the same name, which features rather unreliable ...
Launch will boost Beidou
China will launch another three satellites for the Beidou system, the country's global positioning and navigation network, enabling it to provide a free positioning, navigation and time service for customers in the Asia-Pacific by the end of the year.
ZenithOptimedia Group launches new global positioning
The world’s fastest growing media agency network unveils global rebrand to reflect new positioning
GPS rival Beidou will cover Asia Pac by end of the year
Chinese satnav project could go global as early as 2014 China will expand its home grown GPS rival Beidou by launching three global positioning satellites that it hopes will make it possible to have the service up and running in Asia Pacific by the end of the year.…
Choate: When it comes to Global Positioning Systems, I'm lost
WASHINGTON —The orders were coming fast, furious and conflicting. "Make a legal U-turn."