LO2/LH2 propulsion for outer planet orbiter spacecraftGalileo class orbiter missions (750-1500 kg) to the outer planets require a large postinjection delta-V for improved propulsion performance. The present investigation shows that a pump-fed low thrust LO2/LH2 propulsion system can provide a significantly larger net on-orbit mass for a given delta-V than a state-of-the-art earth storable, N2O4/monomethylhydrazine pressure-fed propulsion system. A description is given of a conceptual design for a LO2/LH2 pump-fed propulsion system developed for a Galileo class mission to the outer planets. Attention is given to spacecraft configuration, details regarding the propulsion system, the thermal control of the cryogenic propellants, and aspects of mission performance.
Garrison, P. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sigurdson, K. B. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)