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The Global Positioning System The Path From Research to Human Benefit (1996) / Chapter Skim
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Time and Location, Precisely
Pages 2-2

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... The press would hail O'Grady as a hero, and O 'Grady himself would give credit and thanks to the Marines who "risked their lives to get me out." But another factor allowed the Marines to perform their crucial role in the rescue operation with surgical precision. When O 'Grady had gone down, his life vest contained a portable radio receiver tuned in to a network of 24 satellites letdown as the Global Positioning System (GPS)
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Key Terms

  • rescue operation
  • gps technology
  • life vest
  • crucial role
  • originally conceived

  • force fliers
  • locator device
  • ground troops
  • surgical precision
  • receiver tuned

  • arabian peninsula
  • fundamental properties
  • breathtaking precision
  • technology makes
  • civilian sector

  • factor allowed
  • vest contained
  • featureless desert
  • radio receiver
  • simple question

  • help wondering
  • hundred feet
  • fliers overhead
  • weathered serbian
  • portable radio

  • move swiftly
  • gps receiver
  • remarkable rescue
  • atomic clocks
  • someday lead


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