Beyond GNSS: An introduction to alternative PNT

PNT has become a critical aspect of a wide range of the technologies and services that we depend on every day. With that criticality has come a greater need to assure continuity of availability and precision.

GNSS has been the primary source of PNT for many applications for decades, and it delivers a wide range of benefits. Free at the point of use, capable of delivering high levels of precision, and the only truly global source of positioning, navigation and timing data, it is unfortunately also vulnerable to a wide range of threats.