Contributing to the SpaceWire international standard

—Successful factors for the development of a de jure standard—

Abstract

Incorporating standards for spacecraft in Japan involves trading off various existing standards to comply with requirements and sustainability. However, well-established proprietary specifications developed for Japanese scientific satellites were successfully incorporated into the international standard of embedded networks, called SpaceWire, which was adopted for the X-ray astronomical satellite “ASTRO-H (Hitomi).” Looking back on this proposal process, we studied a mutual collaboration scheme to incorporate Japan’s proposal, regarding the development type international standards.