Global Positioning Satellite
The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. The system provides critical capabilities to military, civil and commercial users around the world. It is maintained by the United States government and is freely accessible to anyone with a GPS receiver.
The GPS project was developed in 1973 to overcome the limitations of previous navigation systems, integrating ideas from several predecessors, including a number of classified engineering design studies from the 1960s. GPS was created and realized by the U.S. Department of Defense (DoD) and was originally run with 24 satellites. It became fully operational in 1994. Bradford Parkinson, Roger L. Easton, and Ivan A. Getting are credited for inventing it.
Advances in technology and new demands on the existing system have now led to efforts to modernize the GPS system and implement the next generation of GPS III satellites and Next Generation Operational Control System (OCX). Announcements from Vice President Al Gore and the White House in 1998 initiated these changes. In 2000, the U.S. Congress authorized the modernization effort, GPS III.
In addition to GPS, other systems are in use or under development. The Russian Global Navigation Satellite System (GLONASS) was developed contemporaneously with GPS, but suffered from incomplete coverage of the globe until the mid-2000s. There are also the planned European Union Galileo positioning system, Chinese Compass navigation system, and Indian Regional Navigational Satellite System.

This is an excerpt from the article Global Positioning Satellite from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
The article Global Positioning Satellite at en.wikipedia.org was accessed 158 times in the last 30 days. (as of: 07/20/2013)
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Global Positioning System - Wikipedia,…
The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or ...
en.wikipedia.org/wiki/Global_Positioning_System
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Welcome to GPS.gov
Public information about the U.S. Global Positioning System (GPS)
www.gps.gov/
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GPS (satellite) - Wikipedia, the free encyclopedia
A GPS satellite is a satellite used by the NAVSTAR Global Positioning System (GPS). The first satellite in the system, Navstar 1, was launched February 22, 1978 ...
en.wikipedia.org/wiki/GPS_(satellite)
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Global Positioning Satellites
In June of 1993 the last of the 24 satellites of the Global Positioning System was placed into orbit, completing a satellite network capable providing position data ...
hyperphysics.phy-astr.gsu.edu/hbase/gps.html
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Garmin | What is GPS?
The global positioning system is a satellite-based navigation system consisting of a network of 24 orbiting satellites, eleven thousand nautical miles in space, ...
www.garmin.com/aboutGPS/
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HowStuffWorks "How GPS Receivers Work"
GPS can pinpoint your location anywhere on Earth. Find out how GPS works, learn about the amazing technology behind GPS and read reviews of GPS ...
electronics.howstuffworks.com/gadgets/travel/gps.htm
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India launches GPS-like IRNSS satellite, aims to complete system by ...
Jul 2, 2013 ... India will soon have a positioning system of its own. Much like our own GPS, the Indian Regional Navigation Satellite System (IRNSS) is ...
www.engadget.com/2013/07/02/india-launches-irnss-1a-satellite/
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Boeing: Global Positioning System (GPS) IIF
GPS is a space-based, world-wide navigation system providing users with highly accurate, three-dimensional position, velocity and timing information 24 hours ...
www.boeing.com/defense-space/space/gps/
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GPS Satellite Outage Information - AGI
All information on this page is taken from the GPS Satellite Outage File and SEM almanacs produced by the US Air Force 2nd Space Operations Squadron, who ...
adn.agi.com/SatelliteOutageCalendar/SOFCalendar.aspx
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GPS Constellation Status - US Coast Guard Navigation Center
GPS CONSTELLATION STATUS FOR 08/17/2013 .... CONDITION: GPS SATELLITE SVN35 (PRN30) WAS UNUSABLE AS OF JDAY 087 (28 MAR 2013)
www.navcen.uscg.gov/?Do=constellationStatus
Search results for "Global Positioning Satellite"
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Global Positioning Satellite in science
Global Positioning Satellites
In June of 1993 the last of the 24 satellites of the Global Positioning System was placed into orbit, completing a satellite network capable providing position data ...
The Global Positioning System (GPS) - University of Colorado Boulder
May 1, 2000 ... Position and Time from Four GPS Satellite Signals .... Geodetic Datum Overview, Department of Geography, University of Texas at Austin ...
University of Texas team takes control of a yacht by spoofing its GPS
Aug 11, 2013 ... Assistant professor Todd Humphreys and his team at the University of Texas at ... Given such signals from four GPS satellites, the time interval ...
GPS Overview - Center for Space Research - The University of ...
The GPS constellation consists of 24 satellites in 6 orbital planes with 4 satellites ... Each GPS satellite is in an approximately circular, semi-synchronous (20,200 ...
The Global Positioning System
Earth in Space; Satellites around the Earth; The Global Positioning System; Positioning with GPS; Student Worksheet: "Seeing" Satellites. Earth in Space.
NASA - Dual RF Astrodynamic GPS Orbital Navigator Satellite
Apr 26, 2013 ... Dual RF Astrodynamic GPS Orbital Navigator Satellite (DRAGONSat) is a collaboration project with two universities (University of Texas at ...
GPS and Relativity - Department of Astronomy
Apr 27, 2009 ... GPS was developed by the United States Department of Defense to provide a satellite-based navigation system for the U.S. military. It was later ...
Unraveling the GPS Mystery, AEX-560-99 - Ohioline
Ohio State University Extension Fact Sheet ... The Global Positioning System is a $12 billion system of 24 satellites (plus a few spares) deployed and maintained ...
Understanding the Global Positioning System
Montana State University-Bozeman ... The Global Positioning System (GPS) is a satellite-based system that can be used to locate positions anywhere on the ...
[PDF]PA-5: GPS Simplified - UK College of Agriculture - University of ...
satellite signal to compute a valid GPS position. Modern ... University of Kentucky College of Agriculture, Lexington, and Kentucky State University, Frankfort.
Books on the term Global Positioning Satellite
GPS Satellite Surveying
GPS Satellite Surveying
Alfred Leick, 2004
The new edition of this essential book reflects the continued advancement of GPS technology, including changing capabilities of the satellites upon which this technology is based, as well as how the technology is integrated within the ...
Applied satellite navigation using GPS, GALILEO, and augmentation ...
Applied satellite navigation using GPS, GALILEO, and augmentation ...
Ramjee Prasad, Marina Ruggieri, 2005
This authoritative work brings you a timely, unified analysis of the various satellite navigation technologies, applications, and services in operation or development, and of the challenges that lie ahead in this rapidly evolving field.
GPS satellite surveying
GPS satellite surveying
Alfred Leick, 1995
GPS Satellite Surveying, Second Edition, includes all the material that made the first edition the standard work on the subject and provides up-to-date information on the most recent developments.
Introduction to GPS: The Global Positioning System
Introduction to GPS: The Global Positioning System
Ahmed El-Rabbany, 2002
1.3 GPS satellite generations GPS satellite constellation buildup started with a series of 11 satellites known as Block I satellites (Figure 1.3). The first satellite in this series (and in the GPS system) was launched on February 22, 1978; the last  ...
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Blog posts on the term
Global Positioning Satellite
Lockheed Martin Delivers Antenna Assemblies for First GPS III Satellite | GPS World
Lockheed Martin Delivers Antenna Assemblies for First GPS III Satellite July 15, 2013 - By GPS World staff 0 Comments Lockheed Martin has completed and is preparing to install the navigation, communication, and hosted payload antenna assemblies for the first satellite of the next-generation GPS III. Seven antenna assemblies, produced at Lockheed Martin’s Newtown, Pennsylania, facility were delivered to the company’s GPS III Processing Facility (GPF) near Denver, Colorado, on June 14.
gpsworld.com/lockheed-martin-delivers-antenna-assemblies-for-first-gps-iii-satellite/
India launches GPS-like IRNSS satellite, aims to complete system by 2016
India will soon have a positioning system of its own. Much like our own GPS, the Indian Regional Navigation Satellite System (IRNSS) is scheduled to
www.engadget.com/2013/07/02/india-launches-irnss-1a-satellite/
ULA Atlas V succesfully deploys new GPS satellite | NASASpaceFlight.com
www.nasaspaceflight.com/2013/05/ula-atlas-v-launch-new-gps-satellite/
University of Texas team takes control of a yacht by spoofing its GPS
Assistant professor Todd Humphreys and his team at the University of Texas at Austin has succeeded in spoofing the GPS-based navigational system and changin...
www.gizmag.com/gps-spoofing-yacht-control/28644/
Lockheed Martin delivers antennas for next-generation GPS satellites | Colorado Springs Business Journal
csbj.com/2013/07/15/lockheed-martin-finishes-next-step-in-next-generation-gps-satellites/
Boeing: 2nd Boeing GPS IIF Satellite Sends 1st Signals from Space
CAPE CANAVERAL, Fla., July 16, 2011 Boeing [NYSE: BA] has received first on-orbit signals from 2nd of 12 GPS IIF satellites it is building for U.S. Air Force.
boeing.mediaroom.com/index.php?s=20295&item=1841
Green light for European GPS: Successful Galileo position fix - European Commission
European Commission - Enterprise and Industry - This website provides information on the EU's enterprise policy, entrepreneurship, business support, innovation, standardisation and e-business.
ec.europa.eu/enterprise/newsroom/cf/itemdetail.cfm?item_id=6847
Lockheed Martin's GPS III Non-Flight Satellite passes Air Force tests -- Defense Systems
The satellite will affordably replace aging GPS satellites in orbit and improve capabilities.
defensesystems.com/articles/2013/07/10/lockheed-martin-gps-iii-satellite.aspx
Pakistan adopts Chinese rival GPS satellite system
Pakistan is set to become the fifth Asian country to use China's domestic satellite navigation system which was launched as a rival to the US global positioning system, a report said Saturday.
phys.org/news/2013-05-pakistan-chinese-rival-gps-satellite.html
Pakistan adopts Chinese GPS satellite system – The Express Tribune
Pakist­an will become the fifth Asian countr­y to use China's domest­ic satell­ite naviga­tion system.
tribune.com.pk/story/551120/pakistan-adopts-chinese-gps-satellite-system/
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