STANDARD ONBOARD DATA HANDLING ARCHITECTURE BASED ON SPACEWIRE

This paper presents the standard onboard data handling architecture that JAXA is developing presently. This architecture specifies an architectural framework on how to develop onboard data handling systems and will be used for all the science spacecraft that JAXA will develop. This architecture consists of three subarchitectures: physical architecture, functional architecture and protocol architecture. JAXA is also developing standard components based on this architecture, which include standard physical components and standard functional components. By using this architecture, the basic portion of onboard data handling systems will be developed by selecting appropriate standard components and connecting them with standard protocols. This will facilitate the design, integration and testing of onboard data handling systems greatly.