Ai-ping ZHAO, Jun-cheng MA, Yong-feng WU, Xin HU, De-chao REN, Chong-rui LI. Predicting Yield Reduction Rates of Frost-Damaged Winter Wheat After Jointing Using Sentinel-2 Broad-Waveband Spectral Indices[J]. Spectroscopy and Spectral Analysis, 2022, 42(7): 2225