[Andrew Holme] wrote in to tell us about some work he’s done to improve his scratch-built GPS receiver. He figured out a way to use the same hardware but double the number of satellites it can ...

The Space Force wants to launch dozens of small, cheap satellites as part of its Resilient GPS program, meant to augment the ...

GPS consists of 24 satellites that all carry clocks synchronised to an extreme degree of precision. When your smartphone uses GPS to locate you on a map, it's picking up signals from some of those ...