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 ...

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 ...

It’s illegal to own or operate a GPS jammer in the United States for many valid reasons. More importantly, it threatens many systems us humans find relevant. If GPS goes down, how will people get ...

LightSquared, a Virginia-based company that plans to build a nationwide wireless broadband network, is proposing to adapt its network so as not to interfere with GPS systems. The company plans to move ...

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.

The problem is that a cell base station would be many orders of magnitude more powerful to a terrestrial observer than a GPS signal. It doesn't take much to raise the noise floor too high to pull in a ...

The country’s GPS systems might be more vulnerable than you think — and the stakes are high. A Global Positioning System failure could affect transportation, banking and emergency operations. But ...

I was considering posting this in the Lounge, but I'm actually looking for a scientifically accurate answer here, or at least one from someone who is well-informed. I have two "hockey puck" GPS ...

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 ...

As a risk reduction effort for the U.S. Air Force’s GPS III Follow On (GPS IIIF) satellite program, Frequency Electronics Inc. has received a contract from Lockheed Martin Space, valued at $5.9 ...

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 ...