Abstract
High energy physicists have today to perform their very complex experiments in large collaborations at the particle accelerators in only two laboratories in Europe, CERN and DESY, while carrying on their university responsibilities and the analysis of the experimental data at home. The whole experimental process forms a vast distributed data processing system, in which better data transmission should help the physicists to work together more effectively than today. The natural speeds for communication between people and around computing equipment are in the region of 50 Kb/s through several Mb/s, and the PTT's are only now beginning to consider offering data services in this region. In the USA several firms are actively creating services based on satellite transmission between small earth stations on the customer's premises. In Europe, a small experiment, STELLA, has been set up to explore the interest of such services for the physics community, and to look at technical problems of achieving high speeds and low error rates. The CEPT is now considering whether to offer similar services using the forthcoming European communication satellites (ECS).
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