Estimating and Examining the Sensitivity of Different Vegetation Indices to Fractions of Vegetation Cover at Different Scaling Grids for Early Stage Acacia Plantation Forests Using a Fixed-Wing UAS. - Kotaro Iizuka; Tsuyoshi Kato; Sisva Silsigia; Alifia Yuni Soufiningrum; Osamu Kozan (Remote. Sens., 2019)