【#Tech24H】Researchers at GNSS Research Center, Wuhan University have developed the world’s smallest chip-scale atomic clock, with an error margin of less than one second over 30,000 years. The clock boasts a volume of merely 2.3 cubic centimeters, about one-seventh the size of comparable products from other countries, while maintaining equivalent performance. This thumbnail-sized chip-scale atomic clock has entered mass production. Leveraging its advantages of miniature size and low power consumption, it is applied in timing synchronization systems for low-orbit satellites and drone swarms.