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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