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

Iridium Launches Breakthrough Alternative Global Positioning System (GPS) Service

Iridium Launches Breakthrough Alternative Global Positioning System ( GPS ) Service Space Ref (press release) Iridium Communications Inc. (IRDM) announced today the official launch of Satellite Time and Location (STL), an...

May 23, 2016

Everything You Need To Know About India's Own Global Positioning System

Huffington Post India Everything You Need To Know About India's Own Global Positioning System Huffington Post India Apart from India, US has Global Positioning System ( GPS ), Russia has Glonass, Europe has...

Apr 29, 2016

New study: Car global positioning system (GPS) market 2016 research report

New study: Car global positioning system ( GPS ) market 2016 research report WhaTech The Car Global Positioning System Market report provides a basic overview of the industry including definitions, classifications,...

May 11, 2016

From June, Panic Button, CCTV Cameras Must In Buses Across India

NDTV From June, Panic Button, CCTV Cameras Must In Buses Across India NDTV "To ensure safety of women after the unfortunate Nirbhaya incident, we have decided to make it mandatory for public transport buses to...

May 25, 2016

European Space Agency Puts 2 Navigation Satellites in Orbit

Phys.Org European Space Agency Puts 2 Navigation Satellites in Orbit ABC News A rocket fired from French Guiana has lifted two satellites into orbit that will form part of Europe's rival to the U.S.-made Global...

May 24, 2016

GPS controllers will sync traffic lights

GPS controllers will sync traffic lights KeysNews.com (registration) Within the year, traffic lights from Roosevelt Avenue to Stock Island will be refitted with Global Positioning System controllers that will allow them...

May 25, 2016

Why GPS is more vulnerable than ever

Christian Science Monitor Why GPS is more vulnerable than ever Christian Science Monitor Their office is the control center for the Global Positioning System ( GPS ) that some 4 billion people around the world use...

May 10, 2016

Darpa Wants an Underwater GPS System for Seafaring Robots

WIRED Darpa Wants an Underwater GPS System for Seafaring Robots WIRED We would be lost without GPS . The Global Positioning System constellation of satellites started life as a military project, but now enables...

May 17, 2016

Undersea Navigation System Under Development

The Maritime Executive Undersea Navigation System Under Development The Maritime Executive POSYDON aims to replace current navigational methods that pose a detection risk for undersea vehicles forced to surface...

May 24, 2016

Make the Most of Your Summer Road Trip With Budget Car Rental

Make the Most of Your Summer Road Trip With Budget Car Rental GlobeNewswire (press release) Budget offers Global Positioning System ( GPS ) devices with guidance by Garmin ® . The units feature an array of navigation...

May 25, 2016