GGOS User Requirements Database: A proposal

For the planning, implementation and future development of GGOS, a comprehensive database of describing the users, their qualitative and quantitative requirements, and the services and products provide by GGOS is a powerful tool to identify gaps in the observing system and to define priorities for the development of the system. Here, we propose an initial structure of the database. With respect to user requirements, a strategy for surveys is discussed. The information concerning the services and products provided is mainly available, though not in a easily accessible database. Tools for the identification of the system gaps appear not to be available directly and need to be developed.