Key Takeaways:
- The National Institute of Standards and Technology (NIST) calculates the official U.S. time using over a dozen atomic clocks at a federal facility in Boulder, Colorado.
- A recent windstorm caused a power outage at the facility, resulting in a 4.8 microsecond drift in the official time.
- The drift is equivalent to about 5 millionths of a second, which is an extremely small amount of time.
- The drift may have had significant consequences for applications related to critical infrastructure, telecommunications, and GPS signals.
- NIST has backup systems in place to minimize disruptions, including battery backup systems for the atomic clocks and a diesel generator for emergency power.
Introduction to Atomic Clocks
The National Institute of Standards and Technology (NIST) is responsible for calculating the official time of the United States. This is done using a network of over a dozen atomic clocks located at a federal facility in Boulder, Colorado. These clocks are incredibly accurate and rely on the natural resonant frequencies of atoms to keep time. The clocks are used to determine the national time standard, known as NIST UTC, which is a weighted average of the readings from the individual clocks. The NIST UTC is used as the official time standard for the United States, and it is also contributed to the global time standard, known as UTC.
The Power Outage and Its Effects
A recent windstorm caused a power outage at the NIST facility, which resulted in a disruption to the official time. The power outage caused a 4.8 microsecond drift in the official time, which is equivalent to about 5 millionths of a second. To put this into perspective, it takes a person about 350,000 microseconds to blink, so the drift is an extremely small amount of time. However, despite its small size, the drift could have had significant consequences for certain applications, such as critical infrastructure, telecommunications, and GPS signals. The drift occurred because the connection between some of the atomic clocks and NIST’s measurement and distribution systems failed, despite the clocks themselves continuing to function thanks to their battery backup systems.
Backup Systems and Recovery
The NIST facility has backup systems in place to minimize disruptions, including battery backup systems for the atomic clocks and a diesel generator for emergency power. In the event of the power outage, critical operations staff were able to restore backup power by activating the diesel generator, which helped to minimize the disruption. The staff were also able to notify high-end users of the disruption and provide them with access to other time-keeping networks. By Saturday evening, power had been restored to the facility, and crews were working to evaluate the damage and correct the 4.8 microsecond drift in due time.
Impact and Significance
The 4.8 microsecond drift in the official time may seem like a small amount, but it could have had significant consequences for certain applications. For example, GPS signals rely on accurate timekeeping to provide location information, and a drift of even a few microseconds could result in errors of several meters. Similarly, critical infrastructure and telecommunications systems rely on accurate timekeeping to function properly, and a drift could result in disruptions or errors. However, for the general public, the drift is likely to be too small to notice, and it is unlikely to have any significant impact on daily life.
Conclusion
In conclusion, the recent power outage at the NIST facility in Boulder, Colorado, resulted in a 4.8 microsecond drift in the official time of the United States. While the drift is an extremely small amount of time, it could have had significant consequences for certain applications, such as critical infrastructure, telecommunications, and GPS signals. The NIST facility has backup systems in place to minimize disruptions, and staff were able to restore backup power and notify high-end users of the disruption. The incident highlights the importance of accurate timekeeping and the need for reliable backup systems to ensure the continuity of critical services.