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The Hipparcos astrometric satellite and visual double stars.
Pannunzio, R.
Astrometry from the Earth is described in this paper with particular attention to the evolution of the observational techniques from the last century to date and to the consequent improvement of results obtained by continually improved techniques. The mission's expected results are considered and the astrometric goals concerning the double and mul…
The Ulysses Data System.
Tranquille, C.
Following the successful launch of the Ulysses spacecraft in October 1990, there is great expectation that the scientific data return from the first out-of-ecliptic mission will be considerable. The aim of the Ulysses Data System (UDS) is to facilitate the exchange of data between the instrument teams, thereby encouraging scientific research into …