GPS Presentation

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  • 1. GPS
    By: Scott Laspe
  • 2. Background Info
    First usages of Global Positioning Systems
    Military
    Navy 1967 (one update per hour)
    Air force 1972
    Civilian not until 1996
    Clinton allowed civilian signals
  • 3. How GPS Works
    24 satellites orbiting earth (11,000 miles)
    Determine locations through Triangulation
    Broadcast radio waves between each other
    Pinpoint Receiver location
    Time and Distance
  • 4. Increase Popularity, Increasing Problems
    Garmin – TomTom – Magellan
    Affordable
    Flaws
    Availability
    Strength and Accuracy
    Security
  • 5. My Solutions
    Availability (denial of service)
    Apply wireless networking principles
    Cell phone base station handoffs
    Security (signal encryption)
    Quantum Cryptography
    Strength and Accuracy (response time)
    Repeater
  • 6. Availability
    Communication between satellites and antenna (receiver entering cell)
    Data packets received by antenna
    Antenna connected to wireless routers
    Efficiency/timely manner
    Leaving tunnel (cell) receiver establishes direct communication with satellite
  • 7. Experiment/Success
    Real life test / Trial and Error
    Driving through a tunnel with a unit
    Clean handoff into new network
    Use newest IEEE 802.11n wireless networking standard
    Fastest data transfer and most bandwidth available
  • 8. Security
    Key encryption – (eventually can be cracked)
    Quantum Cryptography – fiber optics
    Apply it to data transmission from satellite to receiver
    Military use sensitive information
  • 9. Experiment/Success
    Implement a controlled session with an outsider trying to tap into connection (disrupt signal)
    IF successful one of several data communication channels should shut
    Preventing intruder to eavesdrop
    Heisenberg Uncertainty principle measures continuousness of a signal
    Measures momentum of signal and continuousness of signal.
    Values are based around Planck’s constant that determines if there is enough disruption in the signal
  • 10. Strength and Accuracy
    Initialization period (warm boot/cold boot)
    Long time is a form of DoS
    Repeater device that can boost signal
    Maintain strength over long distance
    Improves accuracy of the units true location
  • 11. Experiment/Success
    Before and After results would determine how successful my repeater theory is
    S/N ratio before the repeater and then after
    S/N
    Power of signal/Power of noise
    Percent change of before and after could tell me exactly how successful the experiment is
    New cold boot time vs old cold boot time
  • 12. Closing
    GPS constantly evolving as technology advances
    Stronger military capabilities and more efficient emergency response programs
    Understand the world better
    Terrain
    Natural Resources