抄録
Since June 2011 to end of March 2014, The University of Tokyo and The Next Generation Space system Technology Research Association had been developing the twin micro-satellite: Hodoyoshi-3 and -4 to demonstrate and establish an innovative system design and a cost-effective development process for mass-production of micro-satellites in the future based on the new concept called "Hodoyoshi" which means reasonably reliable. These two satellites were successfully launched into Sun Synchronous Orbit with an altitude of about 630km on June 19th 2014. So far, we have been getting achievements regarding system performance on-orbit, a lot of mission data, for example, Earth observation images and movies, technical demonstration by new devices, capabilities for new space utilization like space advertisement. In this project, we have been considering and demonstrating, system architecture design methods, integration and test process, on-orbit operation methods including recovery functions from anomaly. This evaluation is undergoing by reviewing operation results from viewpoints of Hodoyoshi concept. This paper descries the Hodoyoshi concept, the major characteristics of the satellites, and the key features and approaches of microsatellite development to realize cost-effective mission.
