In the world we live in, time is far more than just the clock on the wall. From financial transactions to power grids, from ...

More than 20 years ago, in these pages, we referred to television broadcast signals as “signals of opportunity” that might be used for positioning, navigation and timing (PNT). Since then, several ...

Satellite technology has become a cornerstone of commercial aviation, enhancing navigation precision, in-flight connectivity, ...

In cases where GPS satellites may be degraded or unreliable, researchers from Sandia National Laboratories and Ohio State University are considering cellphone towers as alternative sources of signals ...

A safety net of balloon-mounted sensors listening for satellites and cell towers could save lives if an airplane's GPS signals were to get jammed or disrupted. When you purchase through links on our ...