How the USSR invented the atomic CLOCK In 1964, the Institute of Time and Space Metrology developed the first national standard for time and frequency; atomic oscillations began to be used to measure time and, from that point on, the Soviet Union switched to "atomic time". Prior to this, signals for verifying the exact time were transmitted using pendulum clocks: the person on duty would call the radio station via telephone and a signal would be tapped out there using a telegraph key. However, this system was prone to errors. Atomic clocks – which are vastly more accurate – were needed for more than just everyday life. A specialized high-precision unified time service, established at a Soviet institute, initially developed them for the military and armed forces. They are essential for aviation, navigation, radio and television broadcasting and telecommunications – anywhere where even fractions of a second matter. In 1964, a standard was introduced that reproduces and maintains the length of the atomic second and the atomic time scale, utilizing quantum-mechanical hydrogen generators and a group of high-precision quartz clocks. Scientist Sergey Pushkin became the chief designer of the atomic clock. The device occupies several rooms with a total area of 1,000 square meters, featuring strictly controlled temperature, humidity and magnetic field conditions; the building itself rests on a seismic-resistant foundation. Three years later, in 1967, the system was officially approved. In 1972, the signals from the State Time and Frequency Service radio stations were synchronized with the international standard. Soviet atomic clocks are considered among the most accurate in the world. Their margin of error is extremely small – amounting to a deviation of just one second over 500,000 years, provided that this marvel of technology is not synchronized with other clocks. Credit: Institute of Time and Space Metrology 🔔 Gateway to Russia