Concentrates on Bergstrahl's work at NRL (1946-56), principally as an experiment integrator for rocket flights, with additional coverage of his later work at Ford Aeroneutronics and Aerospace Corporation. Besides discussing the procedures and problems of integrating experiments, Bergstrahl relates his work at NRL on early attempts at high altitude photography, on rocket impact point prediction systems, and on cosmic ray balloon research. The discussion of his years (1956-62) at Ford Aeroneutronics examines his work on lunar and planetary studies, including work on the Ranger Hard Lander.
