The articles covering research in the field of time-and-frequency and coordinate-time measurements are represented in most works that determine the theme of the next issue of the Al’manac of Modern Metrology no 9 (the first issue in 2017). 
The first part of the Al’manac attracts considerable attention to fundamental research of aspects of the space metrology, gravitational, gravimetrical and frequency-and-time measurements. The works deal with the direct detection of the gravitational waves, investigation of relativistic synchronization methods for ground and onboard atomic clocks; synchronization and comparison of the time scale.
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The preparation of the next, eighth issue of the Al’manac of Modern Metrology coincided with an important event — the first class of the scientific and educational center of FSUE “VNIIFTRI”. The Main Metrological Center of the State Service for Time and Frequency (GMTs GSVCh VNIIFTRI) organized this class within the framework of the advanced training of metrology staff. This is emphasized in the Preface to the issue. The first lesson was devoted to the measurement of time, frequency and determination of the Earth’s rotation parameters — the main and the most relevant research area, which is widely demanded for many sectors of the economy, including transport, aviation, space complexes, science, etc.
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While focusing on improving the level of metrological support for priority areas of science, engineering, and technology, the seventh issue of the Al’manac gives considerable attention to fundamental research and to the search for new solutions in metrological research.
These important areas primarily include time and frequency measurements and coordinate and navigational measurements, to which the bulk of this issue is devoted, and also neutron measurements.
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