Manned systems utilization analysis (study 2.1). Volume 1: Executive summary

Man's contribution to the achievement of scientific mission objectives in the space environment is investigated in terms of potential improvement in future applications of scientific instruments relative to the need for interactive manned support operations. Emphasis is placed on experience gained from space programs and the development of empirical techniques to associate the benefit of repair and management actions. Design features are addressed in terms of weight, volume, and reliability associated with designing for space maintenance. The results of the following programs are examined: the OVI series of automated spacecraft; the OSO-7 automated spacecraft; and the Skylab S-056 X-ray telescope experiment in the ATM. It is shown that orbital maintenance is the most realistic means of achieving high system availabilities for scientific instruments