From the Editor
The important role of space experiments in the advancement of aerospace science and technology is the theme of this Crosslink. The term "space experiments" encompasses both flight experiments and experimental flights. The first typically generate remote-sensing data—about the space environment, about spacecraft materials, about Earth and its atmosphere. The second demonstrate new spacecraft or payload technologies, increasing our confidence and understanding of new systems while identifying areas needing further development. Lessons learned from space experiments help The Aerospace Corporation provide sound advice to the government for space-system acquisition.
Space experiments are inherently risky, and reducing that risk requires careful engineering and systems integration. Experts in diverse specialties must be consulted throughout the development stage to ensure that no details are overlooked. The importance of mission preparation—in particular, preflight qualification and testing—cannot be overstated; once launched, a space vehicle becomes extremely difficult to repair.
The articles in this issue look at some of the specialized disciplines required for the successful launch and operation of space-science missions. The "ultimate space experiment"—John Glenn's historic orbital flight in the Atlas-launched Mercury "Friendship 7" spacecraft—occurred forty years ago, in the same year The Aerospace Corporation was formed. Fittingly, the lead article chronicles the central role of Aerospace in the success of that flight. Crosslink also introduces a new department—Profile. The first features the corporation's new president and CEO, William F. Ballhaus Jr.
—Michael R. Hilton
