GPS Circuits

  

 

The Global Positioning System (GPS) is a space-based global navigation satellite system (GNSS) that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites. The GPS project was developed in 1973 to overcome the limitations of previous navigation systems,[1] integrating ideas from several predecessors, including a number of classified engineering design studies from the 1960s. 
 
A GPS receiver calculates its position by precisely timing the signals sent by GPS satellites high above the Earth. Each satellite continually transmits messages that include the time the message was transmitted
precise orbital information (the ephemeris) the general system health and rough orbits of all GPS satellites (the almanac).
 
Three satellites might seem enough to solve for position since space has three dimensions and a position near the Earth's surface can be assumed. However, even a very small clock error multiplied by the very large speed of light the speed at which satellite signals propagate results in a large positional error. Therefore receivers use four or more satellites to solve for the receiver's location and time.
 
The very accurately computed time is effectively hidden by most GPS applications, which use only the location. GPS has become a widely deployed and useful tool for commerce, scientific uses, tracking, and surveillance. GPS's accurate time facilitates everyday activities such as banking, mobile phone operations, and even the control of power grids by allowing well synchronized hand-off switching.
 
 

 

 

News

The looming threat that our leaders ignore

Pittsburgh Post-Gazette The looming threat that our leaders ignore Pittsburgh Post-Gazette America's Global Positioning System is a technological miracle and our gift to the world. Highly precise and ......

Jan 15, 2017

Europe turned on the Galileo satellite navigation system, which will ...

Quartz Europe turned on the Galileo satellite navigation system, which will ... Quartz We tend to use “GPS” the way we use “Kleenex” or “Band-Aid”—as a brand name substitute for the generic “satellite navigation...

Dec 27, 2016

Evolution of GPS goes in the right direction | Brantford Expositor

Evolution of GPS goes in the right direction | Brantford Expositor Brantford Expositor Originally called NAVSTAR, GPS, short for global positioning system, has become part of our daily lives. Created in 1973 by the United...

Jan 14, 2017

Anti-Jamming Market for GPS: Global Industry Analysis, Size, Share ...

Anti-Jamming Market for GPS: Global Industry Analysis, Size, Share ... Digital Journal Modern warfare is being revolutionized by the GPS technology. Military and defense organizations depend on satellite technology for...

Jan 12, 2017

How has map reading changed since the 1600s?

How has map reading changed since the 1600s? OUPblog (blog) Speaking of GPS — Global Positioning System —it was developed in the United States and launched in 1973. In effect, it is like a digital map that can pinpoint the...

Jan 10, 2017

The Next National Security Crisis: Protecting GPS

Newsmax The Next National Security Crisis: Protecting GPS Newsmax "America's Global Positioning System is a technological miracle and our gift to the world," Goward, president of the Resilient...

Jan 13, 2017

Canadian Army successfully tests GPS anti-jamming system for its artillery

Ottawa Citizen Canadian Army successfully tests GPS anti-jamming system for its artillery Ottawa Citizen The Canadian Army says its artillery gunners have run successful live fire tests on a new device designed to...

Jan 11, 2017

Low Cost Platform Allows Prototyping Wearables with Ease

DesignNews Low Cost Platform Allows Prototyping Wearables with Ease DesignNews ... using block, circuit schematic diagrams, and its printed circuit board design. Also, to illustrate the ease in prototyping wearable...

Jan 4, 2017

French Space Agency chief: 'Galileo will guarantee our independence'

EurActiv French Space Agency chief: 'Galileo will guarantee our independence' EurActiv Jean-Yves Le Gall, the head of the French Space Agency (CNES), spoke to EurActiv's partner Ouest-France about Galileo,...

Jan 16, 2017

Insurance gaps leave shipping exposed to growing cyber threats

Reuters Insurance gaps leave shipping exposed to growing cyber threats Reuters But ships are also exposed to interference through electronic navigation devices such as the Global Positioning System ( GPS ) and lack...

Jan 12, 2017

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