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Understanding Global Positioning System (GPS) and How It Functions

Global Positioning System (GPS) utilizes a constellation of satellites orbiting the Earth to pinpoint locations accurately for various applications. Learn about the technology, workings, and benefits of GPS in this informative guide. Discover how GPS satellites work, the process of triangulation for location calculation, and the importance of accurate timing and signal correction for precise measurements. Explore the practical applications of GPS in vehicle tracking and combining GPS with RFID technology for tracking purposes.

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Understanding Global Positioning System (GPS) and How It Functions

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Presentation Transcript

  1. What is Global Positioning System (GPS)

  2. HOW IT FUNCTIONS… • The Global Positioning System (GPS) is actually a worldwide radio-navigation system formed from a constellation of 27 satellites. 24 of which are currently in use, while the other 3 are present incase of an emergency, or any others break down

  3. HOW IT WORKS… • These satellites weigh between 3000 and 4000 pounds, and are solar powered. They glide through space at an altitude of approximately 11,000 nautical miles (above the Earth's surface), and circulates around the globe at about 12,000 miles. Which allows the satellites to make a complete orbit around the earth twice a day.

  4. HOW IT WORKS… • The orbit of each satellite, is arranged so the user has at least 4 satellites over-head, any where in the world, allowing the user to receive a relatively good signal. Five ground stations that make sure the satellites are working properly. GPS uses these satellites as reference points to calculate positions accurate to just a few meters. In fact, with advanced forms of GPS you can make measurements to better than a centimeter!

  5. Here's how GPS works in five steps: • The basis of GPS is "triangulation" from satellites. • To "triangulate," a GPS receiver measures distance using the travel time of radio signals. • To measure travel time, GPS needs very accurate timing. • Along with distance, you need to know exactly where the satellites are in space. • Finally you must correct for any delays the signal experiences as it travels through the atmosphere. You must also correct for the clock differences between the GPS receiver and the satellites.

  6. VEHICLE TRACKING WITH GPS

  7. TRACKING USING GPS AND RFIDsource: IBO Past Papers

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