- #1
fargoth
- 320
- 6
:rofl: :rofl: just searched to see what rf freq was used by NIST, and found this cool wristwatch 
http://www.leapsecond.com/pages/atomic-bill/
http://www.leapsecond.com/pages/atomic-bill/
The world's first atomic wristwatch, the Seiko Astron, was a revolutionary timepiece that used atomic radio signals to automatically adjust its time, making it the most accurate watch in the world at that time.
The first prototype of the Seiko Astron was created in 1957 by Japanese watchmaker Seiko, but it was not until 1969 that the first commercial model was released to the public.
The Seiko Astron uses a tiny antenna to receive signals from atomic clocks located around the world. These signals are used to adjust the time and date on the watch, ensuring accuracy to within one second in every 100,000 years.
One of the biggest challenges in creating the Seiko Astron was miniaturizing the technology to fit into a wristwatch. The scientists and engineers at Seiko had to overcome technical hurdles and find ways to reduce the power consumption of the watch in order to make it feasible for everyday use.
The Seiko Astron revolutionized the watchmaking industry by introducing a new level of accuracy and precision. It paved the way for other watchmakers to develop their own atomic watches and also inspired advancements in other fields, such as satellite technology and global communication systems.