Global positioning system


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Global positioning system

  1. 1. GLOBAL POSITIONING SYSTEM By Nathan Willett, Carlos Chersia, David Guarin, Gabriela Guapache
  2. 2. History 1960 April 13 The first navigation satellite TRANSIT IB is launched for use by the U.S. Navy in order to locate ballistic missile submarines and ships. May 15 Drs. Ivan Getting and Shep Arikin of Raytheon propose a radio-navigation system called MOSAIC (Mobile System for Accurate ICBM(intercontinental ballistic missiles) Control) to the U.S. Air Force.
  3. 3. History (Part 2) 1964-1966 Aerospace scientists and engineers conduct a series of satellite navigation studies within the company’s Systems Planning Division. These studies arrive at the operational concept for GPS as we know it today.(Tell you your location)
  4. 4. History (Part 3) 1978 Block I comprised 10 developmental satellites launched from 1978 through 1989. 1983 May 20 The Air Force signs a $1.2 billion contract for the production of 28 GPS Block II satellites with Rockwell Space Systems.
  5. 5. History (Part 4) September A Korean civilian airliner is shot down by Russian fighters after accidentally intruding into Soviet air space. To prevent any such tragedy from happening again, President Ronald Reagan declassifies NAVSTAR; GPS becomes available to civilians.
  6. 6. History (Part 5) 1991 The Persian Gulf War enables American military forces to validate the usefulness of GPS in combat situations. Although not fully operational, GPS allows the military to obtain accurate coordinates in the featureless Iraqi desert and to achieve a quick victory.
  7. 7. History (Part 6) 1994 January 17 The last of the Block IIA satellites is launched, completing the GPS constellation. 1995 April 27 Air Force Space Command declares the Block II NAVSTAR GPS constellation fully operational.
  8. 8. Arrangement and Numbers of Satellites The GPS system consists of 24 earth – orbiting satellites. 4 satellites are in each of 6 different orbital planes Each has an inclination of 55 degrees with respect to the earth’s equator.
  9. 9. How GPS has supported relativity It has supported it because of the General Relativity Theory. The clocks on GPS satellites look like they are going slower from our perspective here on earth.
  10. 10. How GPS has supported Relativivivity This would be a problem, but scientists are able to build systems into the satellite that allows it to correct itself by 45 microseconds per day.