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.

GPS Over Fiber Optic Timing Technology

In the world of timing systems, precision and accuracy are everything. In order to synchronize components across great distances, it’s vital that you retain the ability to communicate cleanly. 

Most typical coax-based GPS timing networks you encounter in the real world fall prey to basic signal propagation challenges. Latency, degradation, and interference are among some of your worst enemies, and your existing systems may not be able to overcome them. Could optical fiber systems hold the key to building superior timing architectures?

The Network Time Protocol (NTP) Advantage

Network Time Protocol (NTP) is widely used in LANs and WANs to synchronize computer clocks to national standard time. NTP sets up a reference server within the network to 'serve' accurate time to all NTP clients in the network requesting accurate time.

Masterclock, Inc. provides full NTP system solutions including NTP timeservers and NTP clocks.

GMR1000 Master Clock Solution

Masterclock's newest master clock server, the GMR5000 can support and synchronize hundreds of thousands of NTP devices on a local area network (LAN) to act as an enterprise-wide source for traceable, accurate time and date distribution. It offers Secure-Socket-Host encryption and MD5 authentication to make communications secure.  It can reference GPS, GLONASS, IRIG-B, or maintain its own time with a high-stability oscillator. The holdover stability of the standard TCXO is plus or minus three seconds per year when the timing reference is lost. This can be increased to plus or minus 250 milliseconds per year with the optional OCXO.  to learn how our precise timing products can help your organization's efficiency and productivity.

GMR Master Clock GPS NTP Network