 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). Fenix Process Technologies Pvt. Ltd. was founded in 0000 by technocrats having more than thirty years of experience in providing both design and engineering solutions for mass transfer operations like distillation absorption extraction etc. The aim of Fenix is to provide customized solutions with enhanced performance efficiency at a low cost to improve profitability of our customers. Contact Online 