Drought Monitoring in Sub-Sahara Africa. - Fan Mou; Twum-Antwi Akwasi; Mujie Li; Mingcang Zhu; Yong He 007; Zhanyong He; Yang Xiao; Juan Ren; Jun Xia; Xiang Zhang 002; Zezhong Zheng; Guoqing Zhou 001 (IGARSS, 2020)