For centuries, astronomers used the stars to tell stories, make predictions, and even find their way. All of which depended on having an accurate map, mental or otherwise, of the heavens above.

Abstract: Geometric constellation shaping for multiple-input single-output optical wireless communication is considered in this letter. We first characterize the optimal shaping region, whose shaping ...

The civilian GPS signals are vulnerable to spoofing attacks in UAV system. A new on-board algorithm named MSSTP-OAD enables low-cost drones to detect counterfeit GPS positions in real time using only ...

Bryan Roth had been hiking and scrambling for a while, with drop-offs evident around him, when his guides held out coveralls ...

Iridium stock may offer 40% upside, with unique spectrum assets, strong cash flow, and new growth avenues. Learn more about ...

A GPS - or global positioning system - is a handy tool for hillwalkers. We examine how to use GPS for hiking navigation ...

Roth was standing at the edge of a cave in Pirkanmaa, Finland. Inside, he knew, was a geocache: a container that was stashed ...

PARIS — Space has become a war-fighting domain, an assessment that calls for doctrinal changes and the ability to intervene ...

Under the agreement, PlanetiQ will deliver 7,000 GNSS-RO profiles per day, including 500 enhanced high-signal-to-noise ratio (SNR) profiles, which are over seven times higher in quality than RO ...

NTN testing raises unique challenges, requiring end-to-end test systems that account for complex scenarios to ensure high reliability.

QinetiQ and Xona Space Systems have demonstrated how GPS navigation can be bolstered by using low Earth orbit (LEO) satellites, in the first UK tests of Xona’s new satellite navigation system, Pulsar.