GPS Timing Frequently Asked Questions

GPS FAQ

What is GPS?

GPS stands for Global Positioning System.  It is a world-wide radio-navigation system formed from a constellation of 24 satellites and their ground stations.  GPS can show you exact positions on earth any time, anywhere, in any weather.  Developed by the department of defense in 1973, GPS was originally designed to assist soldiers and military vehicles, planes and ships in accurately determining their locations world-wide.  GPS is now used as a navigation and positioning tool for scientists, commercial use and for personal use as well.

GPS as a Frequency Standard?

The time and frequency reference for GPS is provided by the United States Naval Observatory (USNO). GPS receivers often provide 1PPS (1 Pulse per Second) timing output, as well as standard output frequencies such as 5 and 10 MHz.  If designed and used properly, a GPS receiver can provide traceability to the NIST (National Institute of Standards and Technology) frequency standard.  All of Brandywine’s products with GPS use NIST to ensure the highest quality frequency standard.

What are GPS Clocks?

GPS clocks are time and frequency products that incorporate a GPS receiver to continuously calibrate a frequency standard and to provide both time of day and frequency information in a variety of formats. These clocks can then by synchronized to other devices to show the precise time and be able to maintain that time through an internal oscillator even when satellites cannot be tracked.  Brandywine Communications has been providing time and synchronization solutions for communications, satellite, military applications, and ground based instrumentation for over 15 years.  With a full suite of products using GPS for its time source, Brandywine has the right product for your timing needs.  Please look at our full line of GPS Synchronized Clocks and contact us with any questions.