Remembering Gladys West, who used Einstein to create GPS - Big Think

TLDR

This article from Big Think honors Gladys West, a pioneering mathematician and geodesist who played a crucial role in the development of the Global Positioning System (GPS). West's work on calculating Earth's geoid and accounting for variations in Earth's gravitational field was essential for the accuracy of GPS. Her contributions, alongside Albert Einstein's theories of relativity, made GPS technology possible.

Very good introduction to the GPS technology and the work that went into developing it. Honours to Gladys West who had contributed much to the development.