Onboard computer complex for unpressurised long-resourced spacecrafts

Efficiency and independence of information satellites operation increased considerably after the use of onboard computer complexes. The first onboard computer prototypes created in the JSC “Izhevsky Radiozavod” (IRZ) for information space vehicles operated inside the satellite pressurized container. For unpressurised communication satellites based on “Salut 32 02” onboard computers (OBCs) a frame-free “Salut 32M“ OBC was developed. Use of the domestic unified processor inside OBC based on the VAX architecture allows to use the software backlog and to reduce timeframe of space projects implementation. The article contains an overview of OBCs developed by IRZ and includes description of the OBS developed for the use in perspective spacecraft platforms produced by JSC “academician M. F. Reshetnev “Information Satellite Systems”.