[M-SD40] Future Missions of Satellite Earth Observation

[MSD40-10] Cloud-Precipitation observation mission by active sensors (2)

*Nobuhiro Takahashi¹, Kinji Furukawa², Yukari Takayabu³ (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.JAXA, 3.The Atmosphere and Ocean Research Institute (AORI) , the University of Tokyo)

Keywords:Cloud and Precipitation, Spaceborne Doppler radar

In the JpGU2020, dual-frequency (Ku/Ka) scanning radar is proposed as the Cloud-Precipitation observation mission by active sensors and the Task Force (TF) team for future remote sensing from space recommended the Cloud-Precipitation observation mission by active sensors as one the highest priority mission. In this presentation, we report on recent activities for the mission achieved. In the US, an architecture study to realize the aerosol, cloud, convection and precipitation (ACCP) mission according to the decadal survey report issued by the National Academy of Science, Engineering and Medicine. In the decadal survey, active sensors including lidar, W/Ka/Ku band Doppler radar are recommended. In addition, international collaboration is strongly recommended. In the original plan of the Cloud-Precipitation observation mission proposed to TF equips Ku and Ka band radar without Doppler measurement capability and the cloud observation is owed by the international partners. Since the ACCP is good opportunity to realize our purpose, JAXA with Japanese community proposed a radar to the ACCP. The major changes from the original proposal is single frequency (Ku-band only) Doppler radar (nadir only). Because of the Doppler observation, antenna size of the radar became 2 x 4 m aperture (original is 2 x 2 m). An intensive study on the Doppler measurement was implemented by the JAXA and scientists of Japanese community.