MTSAT is a Japanese geostationary dual-function satellite program, procured by JCAB (Japan Civil Aviation Bureau) and JMA (Japan Meteorological Agency), and funded by the Japanese Ministry of Land, Infrastructure and Transport (MLIT), with the following overall objectives
1) Aeronautical mission. To augment the air-traffic control services through enhanced communication and position information to Japan's (and the Asia-Pacific region) air traffic capability. The objective is to provide a satellite-based service, referred to as CNS/ATM (Communication, Navigation, Surveillance / Air Traffic Management) by utilizing the GNSS and augmentation services for satellite navigation. The CNS/ATM concept makes use of the ADS (Automatic Dependent Surveillance) function which automatically reports the current aircraft position measured by GNSS to ATC (Air Traffic Control Center).
2) Meteorological mission. MTSAT is a successor program to the GMS (Geostationary Meteorological Satellite) series - representing the next-generation weather-watch satellite series. The advanced meteorological observation capabilities include data collection services for a large user community.