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

No GPS in 50% of public vehicles

Times of India No GPS in 50% of public vehicles Times of India NEW DELHI: Delhi government's much touted safety net, the global positioning system device in every public transport vehicle, is not working in...

Apr 17, 2017

Raytheon next-generation GPS system testing moves from factory to ...

Raytheon next-generation GPS system testing moves from factory to ... Government Security News AURORA, CO April 19, 2017 The testing of the Launch and Checkout System for the Global Positioning System Next-Generation...

Apr 21, 2017

Next-Generation GPS Launch System Testing Moves from Raytheon ...

Next-Generation GPS Launch System Testing Moves from Raytheon ... Space Ref (press release) The testing of the Launch and Checkout System for the Global Positioning System Next-Generation Operational Control System, known...

Apr 20, 2017

2 SOPS says goodbye to GPS satellite

Schriever Air Force Base 2 SOPS says goodbye to GPS satellite Schriever Air Force Base At 25-years old, Global Positioning System Satellite Vehicle Number 27 completed its time in orbit before the 2nd Space...

Apr 21, 2017

City GPS trackers helping with efficiency

City GPS trackers helping with efficiency The Commercial Dispatch Long idling times for vehicles, joyriding and other misuses -- a 2014 J5 Broaddus study of Global Positioning System ( GPS ) data from trackers mounted...

Apr 26, 2017

Chennai Metrowater Supply: Chennai: GPS to track tankers, plug ...

Times of India Chennai Metrowater Supply: Chennai: GPS to track tankers, plug ... Times of India CHENNAI: Residents may soon have to wait for shorter periods to sight the familiar blue Metrowater tanker trundle down...

Apr 22, 2017

New players trigger new space race, GPS III update : GPS World

GPS World magazine New players trigger new space race, GPS III update : GPS World GPS World magazine From the Space Symposium: new players in space race, new capabilities afforded by 3D printing and virtual reality,...

Apr 26, 2017

In the making: Drones that fly without GPS to boost SAF capabilities ...

TODAYonline In the making: Drones that fly without GPS to boost SAF capabilities ... TODAYonline SINGAPORE — Operating as a team, an autonomous vehicle with an unmanned aerial vehicle (UAV) flying overhead as...

Apr 21, 2017

GPS tracking to rein in water tankers in dist- The New Indian Express

The New Indian Express GPS tracking to rein in water tankers in dist- The New Indian Express The New Indian Express KOCHI: Henceforth, keeping tabs on the tanker lorries which ferry potable water here will be a less...

Apr 10, 2017

CBSE for GPS, CCTV cameras in school buses

Times of India CBSE for GPS , CCTV cameras in school buses Times of India PATNA: The Central Board of Secondary Education (CBSE)-affiliated schools are gearing up to equip their buses with Global Positioning System...

Apr 4, 2017

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