Foreward -- Studies on sharing spectrum -- Ch. 1. General structure of meteorological systems -- Ch. 2. Meteorological satellite service -- Ch. 3. Meteorological aids service -- Ch. 4. Meteorological radars -- Ch. 5. EESS systems for meteorological activity -- Ch. 6. Other radiocommunication systems for meteorological activities -- Annex 1. Acronyms and abbreviations commonly used in meteorology