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

SpaceX Outbids ULA for Military GPS Contract Igniting Fierce Launch Competition

Universe Today SpaceX Outbids ULA for Military GPS Contract Igniting Fierce Launch Competition Universe Today ... launch contracts from the U.S. Air Force just got more even intense with the announcement that SpaceX...

Mar 23, 2017

Innovation in US Air Force's GPS Control System

i-HLS - Israel Homeland Security Innovation in US Air Force's GPS Control System i-HLS - Israel Homeland Security U.S. Air Force Global Positioning System Next-Generation Operational Control System, known as...

Mar 23, 2017

Clemson ag engineer develops GPS software to track soil sampling

Clemson Newsstand Clemson ag engineer develops GPS software to track soil sampling Clemson Newsstand BLACKVILLE — Clemson University agricultural engineer Kendall Kirk has developed free software to help farmers...

Mar 8, 2017

IMC to spend R1.3cr to install GPS in garbage vans, CCTVs at ...

IMC to spend R1.3cr to install GPS in garbage vans, CCTVs at ... NYOOOZ The civic body also plans to install CCTV cameras at landfills and other garbage disposal sites. A Smart approach to garbage disposalIndore: In order...

Mar 26, 2017

Set rules on GPS data collection

Set rules on GPS data collection The Japan Times The Supreme Court has ruled that the collection of data through the Global Positioning System in police investigation without a warrant is illegal, and the National...

Mar 25, 2017

Using GPS switches off parts of brain, scientists find

Channel NewsAsia Using GPS switches off parts of brain, scientists find - Channel ... Channel NewsAsia Scientists studying what satnavs (GPS systems) do to the brain have found that people using them effectively switch...

Mar 24, 2017

GPS + Galileo = better navigation

C4ISR & Networks GPS + Galileo = better navigation C4ISR & Networks "This innovative research project aims to demonstrate how a second-generation Satellite-Based Augmentation System (SBAS) testbed can — for the...

Mar 7, 2017

Locate technology a potential lifesaver | Simcoe Reformer

Simcoe Reformer Locate technology a potential lifesaver | Simcoe Reformer Simcoe Reformer Michele Hough, the local volunteer co-ordinator of Project Lifesaver, with an example of the new signage that will soon be...

Mar 26, 2017

New app gives Pittsfield residents way to track government action

Berkshire Eagle (subscription) New app gives Pittsfield residents way to track government action Berkshire Eagle (subscription) Connors said Andrew Rist of Pine Ridge Technologies embraced the fact that the system...

Mar 26, 2017

DevOps process reduces GPS OCX development time for Raytheon ...

UPI.com DevOps process reduces GPS OCX development time for Raytheon ... UPI.com Raytheon is closer to delivering next-generation capabilities for the U.S. Air Force-led Global Positioning System Operational Control...

Mar 9, 2017

Units & Modules