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2 cards from this section. Quick, good the night before a test.
What is trilateration?
Think about how we use satellites for positions.
Why do we need four satellites to determine a 3D position?
Visualize how a box unfolds in space.
What is the key method used to determine a position in GPS?
Think about using distances from satellites.
True or False: A GPS receiver can determine its location using signals from three satellites.
Picture the dimensions you need.
Explain the effect of atmospheric conditions on satellite signals as a function of distance. Consider how this affects trilateration accuracy.
Think about light passing through glass—distortions can occur.
Calculate the error margin for a GPS positioning system when there are only three satellites in use. Discuss the implications for altitude accuracy.
Use geometric shapes to visualize the limits of your positioning.
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