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

GPS installed in five Coimbatore Corporation garbage trucks

Times of India GPS installed in five Coimbatore Corporation garbage trucks Times of India "Once all the trucks are monitored with GPS , we can calculate the time taken for each trip, where the truck gets...

Sep 22, 2016

Corpn to monitor waste management in city with help of GPS technology

Times of India Corpn to monitor waste management in city with help of GPS technology Times of India Using global positioning system ( GPS ), the corporation commissioner and zonal sanitary officials can now track...

Sep 23, 2016

Navy Resumes Teaching Celestial Navigation Just in Case GPS Is Neutralized

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Sep 19, 2016

Developing Undersea GPS

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Sep 23, 2016

Australia Is Not as Down Under as Everyone Thinks It Is

Australia Is Not as Down Under as Everyone Thinks It Is New York Times People on the ground may not notice, but the Global Positioning System does. So Australia needs to adjust its longitudes and latitudes so they line up...

Sep 23, 2016

Greenland Ice Loss 40 Trillion Pounds Bigger Than Thought

ABC News Greenland Ice Loss 40 Trillion Pounds Bigger Than Thought ABC News In this photo provided by Michael Bevis, The Ohio State University, the Greenland Global Positioning System ( GPS ) Network (GNET) in...

Sep 21, 2016

Civic body to install GPS on 150 vehicles

Times of India Civic body to install GPS on 150 vehicles - Times of India Times of India The municipal corporation will install global positioning system (GPS) on its 150-odd vehicles for tracking their movement....

Sep 24, 2016

GPS trackers to keep children safe

The Punch GPS trackers to keep children safe The Punch The Global Positioning System , also known as Navstar, is a global navigation satellite system that provides location and time information in all weather...

Sep 19, 2016

Vineyard Boaters Sound Off on Coast Guard Plan to Remove Buoys

The Vineyard Gazette - Martha's Vineyard News Vineyard Boaters Sound Off on Coast Guard Plan to Remove Buoys The Vineyard Gazette - Martha's Vineyard News “Anybody who would rely on GPS ( Global Positioning System )...

Sep 24, 2016

SMC exercises contract options to procure two additional GPS III satellites

Air Force Link SMC exercises contract options to procure two additional GPS III satellites Air Force Link “The GPS III SV 9 and 10 satellites are expected to be ready for launch in 2022, thus sustaining the GPS...

Sep 22, 2016