[M-SD35] Future Missions of Satellite Earth Observation

[MSD35-03] Realization of pseudo high-frequency high-resolution observation by combined observation of geostationary satellite and orbiting satellite

*Hidetake Hirayama^1,2, Koji KAJIWARA¹, Yoshiaki HONDA¹ (1.Center for Environmental Remote Sensing, Chiba University, 2.Department of Informatics, Tokyo University of Information Sciences)

Keywords:Geostationary satellite, Orbiting satellite, Himawari, GCOM-C, ALOS

From both fields of earth science and practical use, higher frequency and higher resolution observation data is desired for the earth observation optical sensor data. A budget request for the next Himawari series will be made in FY2022, and it is expected that high-precision and high-frequency observations by the Himawari series will be realized for an even longer period. However, high-frequency observation and high-resolution observation cannot be simultaneously realized with a single satellite. Trying to achieve this with many microsatellite operations. Although microsatellites generally have problems such as a short design life and no calibration system. On the other hand, medium or larger satellites including geostationary satellites have a long design life and calibration system. However, to achieve high-frequency and high-resolution with a satellite of a medium or larger size, the budget is enormous and impractical to secure the number of satellites. This proposal is to generate the pseudo high-frequency and high-resolution observation data, based on high-frequency observations of relatively low-resolution geostationary satellites and high-resolution but low-frequency orbiting satellite observations among satellites launched by Japan (assuming successors such as Himawari, GCOM-C, and ALOS). That aims to generate pseudo data models that mutually adjust some of the sensor specifications of each satellite and adjust for differences in observation geometry to build a framework to high-quality long-term provisions. This makes it possible to the long-term realization of satellite optical sensor data in earth science and practical applications, and to advance science and expand practical use. This framework is a step toward achieving greater results with the planned budget, and the expansion of practical applications will also contribute to ensuring the continuity of earth observation in Japan. Furthermore, by incorporating newly planned satellites from other countries into this framework, we aim to increase Japan's earth observation presence in the fields of earth science and practical use.