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Flashcards in 3l Satellite Communication Systems Deck (2):
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The Mountain Rescue Team’s emergency vehicles are to have a satellite tracking system installed in them.
Describe two advantages of tracking its vehicles in this way (4 marks)

 the vehicle can be located (1) at any time (1)
 most appropriate vehicle (1) dispatched to closest emergency site (1)
 arrive within stated time (1) meeting response targets (1)
.
 if vehicle is stolen (1) location can be passed to police/vehicle retrieved (1)

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The employees use Global Positioning Systems (GPS) to navigate to the customers’ properties. Describe how satellites are used in GPS.(4 marks)

4 GPS receiver receives the signals from a satellite (1)
Minimum of four satellites required(1)
satellite transmits its location and time (1)
receiver times differences between satellite signals allows it to work out
position (1).

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