1. Improving and studying the reliability and performance of ground-based active hydrogen atomic clocks;

2. Research on active hydrogen atomic clock technology for space stations;

3. Research on ground-based passive hydrogen atomic clocks;

4. Research on spaceborne passive hydrogen atomic clocks;

5. Research on theories, technologies and methods for time and frequency measurement;

6. Research on time and frequency system technologies, reliability and methods;

7. Research on timing technology for navigation satellites.

8. Research on other types of frequency standards;