Topographic Correction of Forest Image Data Based on the Canopy Reflectance Model for Sloping Terrains in Multiple Forward Mode. - Weiliang Fan; Jing Li 019; Qinhuo Liu; Qian Zhang 006; Gaifei Yin; Ainong Li; Yelu Zeng; Baodong Xu; Xiaojun Xu; Guomo Zhou; Huaqiang Du (Remote. Sens., 2018)