Hugo Fruehauf, one of the co-inventors of GPS, explains the nitty-gritty of what GPS is. He also details his critical engineering work on the GPS subsystem of the atomic clock. Hugo was one of four recipients of the 2019 Queen Elizabeth Prize for Engineering, along with Dr. Bradford Parkinson, Professor James Spilker, and Richard Schwartz. Related to this episode: • Hugo’s website: http://hugofruehauf.com/ • Queen Elizabeth Prize for Engineering: https://qeprize.org/ Subscribe and find more podcast information at: http://www.k12engineering.net. Support Pios Labs with regular donations on Patreon: https://www.patreon.com/pioslabs, or send one-time contributions by buying us coffee: https://ko-fi.com/pioslabs. Thanks to our donors and listeners for making the show possible. The K12 Engineering Education Podcast is a production of Pios Labs: http://www.pioslabs.com.