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periment for cosmic-ray measurements to be performed on-board of the Russian Resurs-DK1 shown in Fig. 1. During launch and orbital manoeuvers the vessel is secured to the satellite’s ARTICLE IN PRESSsatellite. This satellite, which will be launched into space by a Soyuz rocket in 2004, will execute a semi-polar, elliptical orbit with an inclination of body (dashed contour in the figure). During data taking the pressure vessel is swung up (shaded position in the figure) to give PAMELA a clear view into space. Three years of data taking are expected in orbit.E-mail address