THERMAL DESIGN OF THE GALILEO SPUN AND DESPUN SCIENCE

The Galileo spacecraft consists of an orbiter and probe that have instruments to investigate the chemical composition and physical state of Jupiter's atmosphere, the Jovian satellites, and the structure and physical dynamics of the Jovian magnetosphere. This article is the second of three about the thermal design of the Galileo spacecraft. Emphasis in the paper is on the thermal design of the spun and despun science. The thermal design of each instrument is unique and some employ radioisotope heater units. Cruise temperatures from the verification test in the Jet Propulsion Laboratory 25-ft simulator in August 1988 are presented.