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.

Network Time Synchronization - Why You Need An NTP Server

A network time server is not something many business owners think of, and timekeeping is usually not a priority for network administrators. However, proper network time synchronization is an essential part of monitoring a network and resolving issues within it.

Numerous organizations have network devices that use an internal clock or make use of a Public Internet Time Server. The problem is that both of these timekeeping methods are less than optimal solutions. Most companies would be best served by implementing a Stratum 1 NTP  server to ensure that devices on the network are properly synchronized, maintain accurate time behind a firewall, and comply with timekeeping regulations.

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. 

Network Synchronization: Public NTP Servers vs. GPS NTP Servers


Measuring time is about more than merely knowing when events occur. It's a vital prerequisite for synchronizing your operations, securing your data and serving your clientele. It pays to be precise, accurate and on-time, and your ability to do so depends on how good your time server is.

Unfortunately, you're unsure which kind of time server is best. You've narrowed it down to two choices: internet-based NTP and GPS-referenced Stratum 1 NTP. The distinctions aren't so clear, but these facts might make it easier to pick wisely.

IRIG-B Time Code Generators

The IRIG-B time code protocol is used in military, government, power industry, and many other commercial and industrial application to ensure precise time synchronization. Time information is pulse-width coded in either a BCD or binary format.  Masterclock manufactures several devices that can generate IRIG-B time code.