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GPS

GPS. Global Positioning System. GPS. What is GPS?. The global positioning system is a satellite-based navigation system that sends and receives radio signals Made up of a network of 24 satellites placed into orbit by the U.S Department of Defense. GPS Info.

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GPS

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  1. GPS Global Positioning System

  2. GPS

  3. What is GPS? • The global positioning system is a satellite-based navigation system that sends and receives radio signals • Made up of a network of 24 satellites placed into orbit by the U.S Department of Defense

  4. GPS Info • GPS was originally intended for military applications • GPS works in any weather conditions • GPS works any where in the world • There are no subscription fees or setup charges to use GPS

  5. How Does GPS Technology Work? • GPS receiver collects information from the GPS satellites that are in view • GPS receiver accounts for errors • GPS receiver determines the current location, velocity, and time • GPS receiver can calculate trip distance to destination, sunrise and sunset time.

  6. Who Uses GPS? • GPS technology has many amazing applications: • Land • Sea • Air

  7. Ground Transportation • GPS helps monitor and plan routes for delivery vans and emergency vehicles • GPS helps with automatic vehicle location and in-vehicle navigation system • GPS shows the vehicle’s location on an electronic street map • GPS create a route and give turn-by-turn directions

  8. Ground Transportation • Truck drivers travel 100K miles or more per year. • They encounter many varying conditions • Weather --Heavy traffic • Road conditions --Detours • The shipper and the receiver are also very interested where the truck driver is on their route. • GPS allows all three to know where the truck is, and how it is progressing on its journey.

  9. Delivery Trucks

  10. Cement Truck

  11. Dump Truck

  12. Emergency Vehicles

  13. Military • Military aircraft • Target destination • Weapon technology • Ships • Submarines • Tanks • Jeeps

  14. Rail • Precise knowledge of train location • Train control (to prevent collisions) • Maintain smooth traffic flow

  15. Marine • Fishing locations and track fish migration • Navigational Hazard location • Underwater surveying • Marine navigation • Traffic routing • Mapping

  16. Aviation • Accurate aircraft location anywhere on or near the earth • Route navigation and airport approaches

  17. Environment • Helps survey disaster areas • Map the movement of environmental phenomena • Forest fires • Oil spills • Hurricanes • Earthquakes

  18. Hurricane

  19. Space • Helps track and control satellites in orbit • Space shuttles use GPS • Future rockets and reusable launch vehicles will launch, orbit the earth, return, and land, all under automatic control.

  20. Satellite

  21. Space Shuttles

  22. Timing • GPS deliver precise time to any user • GPS helps synchronize clocks and events around the world • Pager companies depend on GPS satellites to synchronize the transmission or information throughout their systems. • Investments banking firms rely on GPS to record international transactions simultaneously

  23. How Accurate is GPS? • GPS depends on the accuracy of signals that travels from GPS satellites to a GPS receiver • Turn on GPS on an open area • It takes between 65 and 85 milliseconds for a signal to travel to GPS receiver on the surface of the earth

  24. Natural Sources Of Interference • Direct interference (solar radio burst in the same frequency band • By scattering of the GPS radio signal in ionospheric irregularities referred to as scintillation

  25. Artificial Sources of Interference • In automotive GPS receivers; metallic features in windshields, such a defrosters, or car window tinting films • Man-made EMI (electromagnetic interference), can also disrupt, or jam, GPS signals

  26. Artificial Sources of Interference Continued • Stronger signal can interfere with GPS receivers when they are within radio range • Obscured locations • Due to the potential for both natural and man-made noise

  27. Virtual GPS • Cell phones have a “My Location” feature that acts very similarly to GPS • Triangulated from nearby cell phone towers, similar to the action of making a call • Information is approximate, and gets better the more you use it • Produces a map which is visible on the phone screen

  28. Summary The Global Positioning System (GPS) is a Satellite-based navigation system that sends and receives radio signals. GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth.

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