Getting from point A to point B using your smartphone’s web mapping application with the familiar pulsing blue dot is part of our daily lives — thanks to satellite system receivers that use global positioning systems (GPS) to give location and time information. Positioning technology is evolving, and today a typical smartphone can pinpoint a person’s location within a few metres, which is adequate for most personal use. But for a future that includes autonomous driving, precision agriculture and natural disaster early warning systems, centimetre-level accuracy will be crucial.