Mon Prof Augmenté
Signals From Satellites
Age 15 · Daily Life
Several satellites orbit above Earth and send timing signals to a hand-held receiver below. The receiver compares how long each signal takes to arrive and works out its position.
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Age 15: open this week
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In the picture
- Satellite clock face without numerals, showing time with two hands
- Short dotted line from a satellite to the hand-held device
- Hand-held device with a plain screen
- Long dotted line from a satellite to the hand-held device
Examples
- A phone map app showing your blue dot as you walk through a city.
- A car navigation screen guiding a driver to a new address.
Key takeaways
- Each satellite carries a precise clock, and the signal’s travel time gives a distance.
- The receiver needs signals from several satellites to fix its position.
Quiz: Signals From Satellites (Age 15)
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What does a satellite’s signal travel time allow the receiver to work out?
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What does the receiver need in order to fix its position?
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What does the receiver compare to work out its position?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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