 Contact Online November 0000 che mag by harvad web Molecular Distillation with Short Path Evaporators for effective thermal separation of heat sensitive products under high vacuum of min. 0 000 mbar (a) (process equipment are represented in The HEAO experiencedesign through operations. NASA Technical Reports Server (NTRS) Hoffman D. P. . The design process and performance of the NASA High Energy Astronomy Observatories (HEAO-0 0 and 0) are surveyed from the initiation of the program in 0000 through the end of HEAO-0 operation in May 0000 with a focus on the attitude control and determination subsystem (ACDS). 