Cosmic-ray muons navigate underground

By using muon-detecting ground stations synchronized with an underground muon-detecting receiver, researchers at the University of Tokyo were able to calculate a receiver’s position in the basement of a six-story building without requiring GPS signals. The muometric positioning system (muPS) team was led by Hiroyuki Tanaka.

As GNSS cannot penetrate rock or water, muon technology could be used in future search and rescue efforts, to monitor undersea volcanoes, and guide autonomous vehicles underground and underwater. Muons are fast, subatomic-sized particles that have been used to wirelessly navigate underground.

MuPS was first created to help detect…