Centimeter-Level Augmentation Service (CLAS) started from Nov.1,2018 with a four-satellite constellation of the Quasi-Zenith Satellite System (QZSS). In CLAS, Centimeter Level Augmentation Information including correction and integrity information is allocated to the QZSS L6 signal and broadcast to users available for the major part of Japan. CLAS infrastructure system has increased the maximum number of satellites included in the Centimeter Level Augmentation Information to be from 11 to 17. Therefore, it seems that even if a dual-band low-cost receiver will have positioning performance comparable to that of a triple-band receiver. This paper attempts to evaluate the positioning performance of CLAS using a dual-band low-cost GNSS receiver. The experimental results show that the AQLOC-Light compatible post-processing software using a dual-band low-cost receiver performs as well as triple-band GNSS receiver. These findings contribute further to the development of a CLAS positioning system.

The space business is expected to expand as an industry that contributes to Japan's economic growth. In order to nurture young engineers who will lead the future, education to create ideas that will trigger innovation is needed. Therefore, we propose an educational method for space business idea creation in university education. We presented examples of technology and applications of the Japanese positioning satellite MICHIBIKI, and had students learn how to analyze them from the viewpoint of business ideas. Students analyzed the case studies, found areas for improvement, and created ideas. The ideas were brushed up through group discussions among the students, and became effective ideas for space business. By comparing the results of the group discussion with those of the idea generation, the students were able to deepen their understanding of a broader perspective. This method proved to be applicable to other space businesses such as weather satellite data.