Announcing the winners of the prestigious £1m award, which was established to celebrate the global impact of engineering on humanity, Lord Browne of Madingley, chairman of the Queen Elizabeth Prize for Engineering Foundation said: “We’ve awarded this prize to a set of people who’ve invented a system to enable us to know where we are, what time it is, and where we’re going. Everything in the modern world, from transportation to banking, agriculture, medicine, the smart phone in our pockets – all of it relies on this technology. They’ve rewritten, in a major way, the infrastructure of our world."
Developed though a US department of defence project which began life in 1973, GPS uses a constellation of at least 24 orbiting satellites, ground stations and receiving devices. Each satellite broadcasts a radio signal containing its location and the time from an on-board atomic clock. GPS receivers need signals from at least four satellites to determine their position, they measure the time delay in each signal to calculate the distance to each satellite, then use that information to pinpoint the receivers location on earth. Each satellite makes a near circular orbit around the globe twice a day, equally spaced around the equator, allowing users from virtually anywhere on Earth to access the system.
Receiving the award at the Royal Academy of Engineering in London, program director and so-called “father of GPS” Dr Bradford Parkinson said: “it’s a recognition not just of the four of us but of scores of engineers that actually made it possible. It’s a deep honour, I appreciate what you have done in recognising people who are virtually anonymous: engineers.
Parkinson added that despite the technology’s origins in the defence sector it was always envisaged that it would have a positive effect on the wider civilian world. “One of the most important things we had when the project started was a vision of world impact. Without that inspiration it would have been difficult for us to weather the storms of doing something for the first time,” he said.
He added that whilst he and his fellow pioneers couldn’t have foreseen the full impact of the technology, early applications envisaged by the team included car navigation systems, and air traffic control, two areas which have been fundamentally transformed by GPS.
The three other members of the team were Hugo Freuhauf, who as chief engineer of Rockwell Industries led the development of the miniaturised atomic clocks that are at the heart of the GPS satellites; Richard Schwartz, program manager at Rockwell, who was the engineer charged with developing the satellites and Professor James Spilker, who designed the signal the satellites broadcast, as well as the first receiver to process the GPS satellite signals. In an intriguing example of reality following fiction, Spilker told The Engineer that his initial work was influenced by the ideas of science-fiction writer Arthur C Clarke, who famously predicted the use of satellites for communication back in 1945.
Commenting on this year's award Chair of the judging panel, Professor Sir Christopher Snowden hailed GPS - which benefits billions of people around the world every day - as an outstanding example of engineering's profound impact on society. “This is a particularly exciting project because it’s something that pulls together so many different technologies," he said, "if you’re looking for something that spans nearly every aspect of engineering and science you've got it here."