System design for artemis environmental monitoring / by H.A. van Ingen Schenau and J. SpaaArtemis network user interface / by A.L.C. van Dorp, K.M. van Wijk and J. SpaaTest and verification equipment for the attitude & orbit control system of the XMM satellite / H.A. van Ingen Schenau, L.C.J. van Rijn and J. Spaa