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10IPT: Focusing on GPS

posted Mar 17, 2013, 1:48 PM by Eddie Woo
Last lesson, we talked about many different wireless communication technologies in overview form so that we could compare and contrast them to each other. But today, we're going to focus on one particular wireless technology - one that we basically assume is a given these days - and think about it in a little more depth.

Watch this corny but informative video, then complete the following tasks:
  1. Outline the way that a GPS receiver determines its location.

  2. How many GPS satellites:
    • Are orbiting the earth?
    • Are usually accessible to a GPS receiver at any given time?
    • Are required to pinpoint a receiver's position?

  3. Investigate some of the current uses of GPS, and evaluate its usefulness to each of these situations.

  4. Discuss the social and ethical issues raised by the existence of GPS, with reference to actual events and news articles to support your discussion points.

  5. Research some of the current or proposed alternatives to GPS, and explain why people and governments desire to build different systems to rival GPS.