Timing from atomic clocks is now an integral part of data-center operations. The atomic clock time transmitted via Global Position System (GPS) and other Global Navigation Satellite System (GNSS) ...

Recent changes in hardware and standards make one-meter accuracy possible, in some cases as soon as this year.

You’ve probably heard of at least one of those terms in any discussion around GPS anti-jam technology for defense. Because they are all terms that describe essentially the same thing: a specialized ...

GPS World provides almanac data for readers to use along with a number of resource links to other authority sites.

You may have heard about “NMEA data” with respect to GPS. NMEA can be confusing because there are a few NMEA messages, not just one.

In this cover story on simulators, we discuss these challenges with experts at four simulator manufacturers including CAST Navigation, Spirent Federal, Spirent Communications, Safran Federal Systems ...

For this column, the file of bench marks provided on the NGS Geoid18 web page were combined with the published ellipsoid, orthometric, and Geoid18 heights from NGS’ datasheet. The difference between ...

To further enhance the benefits of combining space-based geodetic techniques, the European Space Agency (ESA) has established the Genesis mission.

A Comparison of Free GPS Online Post-Processing Services By Mark Silver You are probably familiar with the National Geodetic Survey’s OPUS suite of online post processing tools (OPUS-Static, ...

What is a mobile GNSS solution? Are the terms “mapping grade” and “resource grade” still useful? Who is using which devices for which tasks? Bernhard Richter, VP Geomatics at Leica Geosystems, which ...

China’s BeiDou GNSS is newer, has more features, is more accurate, and has more satellites in the skies of more nations than the venerable U.S. GPS, according to Sarah Sewall, Executive Vice President ...

Clocks are at the heart of GPS. Advances in space-qualified atomic clocks that kept time to within 10 nanoseconds over a day were a key development that made GPS possible. It turns out that GPS must ...