The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

ARE WE THERE? In a multi-GNSS world, that is. We’ve asked that question from time to time in this column over the years. So, are we there yet? That depends. One definition of “multi” is more than one.

SINGLE-FREQUENCY GPS POSITIONING. Can it get any better? In the March 2018 edition of this column, we looked at the development of precise point positioning or PPP — the (mostly) carrier-phase-based ...

This study will review Federal Communications Commission order FCC 20-48, which authorized Ligado Networks LLC to operate a low-power terrestrial radio network adjacent to the Global Positioning ...

Optical atomic clock technology has reached space for the first time after Australian startup QuantX Labs confirmed a Nobel ...

Have you ever sent your location to somebody and then realized you’re a few buildings away from the marker on the map? Well, that’s exactly what Xiaomi aims to fix with dual frequency GPS receivers on ...

The global positioning system (GPS) constellation comprises 24 or more satellites in six orbital planes at an altitude of approximately 12,550 miles. Synchronized with on-board atomic clocks, the ...

It’s a common occurrence to see me running with a GPS watch on each wrist, doing comparison tests between different brands or updates to the same range—like the Garmin Forerunner 945 vs. the 935. In ...

The argument raging over LightSquared’s proposed LTE network and possible interference with GPS services is actually two arguments over two sets of frequencies, both of which the startup hopes ...

A new congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine assesses the likelihood of harmful interference from Ligado Networks’ authorized use of the ...