MCP Insights

Dennis Matzen

Dennis has extensive diversified experience in the design, installation and management of computer systems and communications networks for public safety. His expertise includes in-depth working knowledge and experience of network switching, routing and security specializing in Windows server/ workstation products, virtualization systems and AIX/UNIX environments. He brings these experiences and skills to all aspects of every project.

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This Weekend's GPS Rollover Event Requires Public Safety Communication's Attention

Posted by Dennis Matzen on Apr 5, 2019 11:00:00 AM

Global Positioning System (GPS)-based time sources are used throughout the public safety sector to synchronize a wide array of systems and equipment, including radio consoles, voice recorders, and computer-aided dispatch, fire alarm and video surveillance systems. Such time sources, known as master clocks, also ensure that every system used by a public safety agency generates an accurate, consistent timestamp for every emergency event that requires a law enforcement, fire/rescue and/or emergency medical services (EMS) response.

An event that will occur in two days—Saturday, April 6—threatens to throw things out of sync, at least to some degree. GPS marks time by transmitting signals that indicate the current week and the number of seconds into that week. That data is then converted by the various systems and equipment into the more recognizable format of year, month, day and time of day.

Because the field that represents the current week is a 10-bit binary number, a total of 1,024 weeks can transpire—roughly 19.7 years—before GPS resets the week value to zero. In the world of GPS, this time period is known as an epoch. The first epoch began on January 6, 1980 and rolled over on August 21, 1999; the second epoch will roll over in two days.

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Topics: Industry News, Public Safety Technology

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MCP Insights by Mission Critical Partners is the online destination for public safety leaders to expand their knowledge, stay abreast of trends, and discover innovative ideas to help implement change that will advance the industry... Because the mission matters.

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