December 15, 2020 Technical Requirements for Ku-band Non-geostationary Satellite Communications Systems by Satellite Constellation Using 500 km Altitude Orbit

Partial report from Information and Communications Council

The Ministry of Internal Affairs and Communications (MIC) has today received a partial report from the Department on Information and Communications Technology (chaired by NISHIO Shojiro, President of Osaka University) concerning technical requirements for Ku-band non-geostationary satellite communications systems by satellite constellation using a 500 km altitude orbit. These requirements are part of technical requirements for mobile satellite communications systems using non-geostationary satellites (Telecommunications Technology Council inquiry No. 82 of September 25, 1995).

1. Background

The practical application of small artificial satellites has become relatively easy. As a result, a satellite constellation is possible, which links and operates a large number of small satellites launched in medium and low orbits with minimum communication latency. Therefore, it has become possible to provide various services, such as high-speed, large-capacity communications services.
In response to this, a new communication service using the Ku-band non-geostationary satellite communication system with a satellite constellation using an orbit at an altitude of about 500 km is scheduled to start. To conduct a feasibility study to introduce this service in Japan, the Satellite Communications System Subcommittee (Chief Investigator: ANDO Makoto, Professor emeritus of Tokyo Institute of Technology) has been studying the technical conditions of the system since June 2017, from which MIC has received a partial report today.

2. Future plans

Considering the partial report, MIC will develop technical standards for Ku-band non-geostationary satellite communication systems with a satellite constellation that will use orbits at an altitude of 500 km.


For further information about this press release, please fill in the inquiry form and submit it to MIC on the website

International Policy Division, Global Strategy Bureau, MIC

TEL: +81 3 5253 5920

FAX: +81 3 5253 5924