基于近地遥感系统的小麦玉米冠层RVI和NDVI获取影响因素分析
郑裕东1, 徐云成1, 严海军1,*, 郑永军2

Analysis of Influencing Factors in Wheat/Maize Canopy RVI and NDVI Acquisition Using Ground-Based Remote Sensing System
ZHENG Yu-dong1, XU Yun-cheng1, YAN Hai-jun1,*, ZHENG Yong-jun2
观测天顶角 θ 及观测方位角 φ 示意图