Environment


To reduce the environmental impact on the stability of time and frequency systems, a specially designed Standard Time and Frequency Laboratory has been established. This laboratory is dedicated to maintaining highly accurate national time and frequency standards. The key features of the laboratory include:

1. Four Electromagnetic Isolation Chambers for Atomic Clocks: These chambers are designated for housing clusters of cesium atomic clocks and active hydrogen maser clocks, along with comparison and recording devices, and phase adjusters. These components collectively contribute to the generation of national time and frequency standards.

2. One International Time and Frequency Comparison Equipment Room: Equipped with satellite navigation receivers and bi-directional satellite time transfer transceivers, this room facilitates international time and frequency comparisons. It does so by connecting with other national time and frequency standards laboratories through navigation and communication satellites, ensuring alignment with international time and frequency standards

3. One Calibration Electromagnetic Isolation Chamber: This chamber is outfitted with various systems from the National Time and Frequency Standards Laboratory for energy and calibration services. It includes the 'Time Measurement System', 'Frequency Measurement System', 'Phase Comparison System', and 'Frequency and Phase Measurement System'. These systems provide calibration services, aiding domestic time and frequency equipment and products in aligning with international standards.

4. Controlled Environment in Isolation Chambers: Each chamber is maintained within a strict temperature range of 21ºC to 25ºC and humidity levels of 40% to 60%. To ensure an uninterrupted power supply, all equipment is safeguarded with a multi-tiered protection system comprising mains electricity, Uninterruptible Power Supplies (UPS), backup generators, and direct current batteries.