GPS

GPS vs. GNSS: Understanding PNT Satellite Systems

A GNSS, or Global Navigation Satellite System, is a generic name for a group of artificial satellites that send position and timing data from their high orbits. The GPS, or Global Positioning System, is just one of the many different sets of satellites that can provide such data.

Most satellite navigation systems operate on similar principles. The satellites are arranged in geosynchronous orbits – Each one's speed and altitude is carefully controlled so that it stays in the same place in the sky.

Are You Ready for the Next GPS WNRO (Week Number Rollover)?

Click here to read the Department of Homeland Security’s memorandum about the upcoming Global Positioning System Week Number Rollover Event.

Do your networks or systems use Coordinated Universal Time, or UTC? April 6, 2019, is probably a date worth marking in advance. Unlike a regular calendar event or holiday, this day will mark a special rollover of the GPS week number, or WN, that helps receivers tell time more precisely.  

The only question is whether your devices will react to the rollover event properly. Here's what you should know.