Photos of the 2019 QEPrize winners at Buckingham Palace.
The Queen Elizabeth Prize for Engineering has been awarded to the creators of GPS.
The 2019 QEPrize trophy has been designed by 16-year-old Jack Jiang, from Hong Kong.
Find out more about Bradford Parkinson, James Spilker, Hugo Fruehauf and Richard Schwartz.
Find out about the engineering behind GPS.
The QEPrize judges introduce GPS.
Images of Bradford Parkinson, James Spilker, Hugo Fruehauf and Richard Schwartz.
Infographic about the development of GPS.
Graphics about GPS technology.
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