基于ICESat-2和Sentinel-2A数据的森林蓄积量反演

刘美艳, 聂胜, 王成, 习晓环, 程峰, 冯宝坤

Forest stock volume inversion based on ICESat-2 and Sentinel-2A data

LIU Meiyan, NIE Sheng, WANG Cheng, XI Xiaohuan, CHENG Feng, FENG Baokun

表3 植被指数

Tab.3 Vegetation index

名称	公式^①	名称	公式
归一化植被指数NDVI	$N D V I = \frac{N I R - R}{N I R + R}$	增强型植被指数EVI	$\begin{array}{l} E V I = \\ \frac{2.5 (N I R - R)}{N I R + 6 R - 7 B + 1} \end{array}$
比值植被指数RVI	$R V I = \frac{N I R}{R}$	可见光抗大气指数VARI	$\begin{array}{l} V A R I = \\ \frac{G - R}{G + R + B} \end{array}$
差值植被指数DVI	$D V I = N I R - R$	大气抗阻植被指数ARVI	$\begin{array}{l} A R V I = \\ \frac{N I R - 2 (R - B)}{N I R + 2 (R - B)} \end{array}$
红绿植被指数RGVI	$R G V I = \frac{R - G}{R + G}$	土壤修正植被指数SAVI	$\begin{array}{l} S A V I = \\ \frac{(1 + L) (N I R - R)}{(N I R - R + L)} \end{array}$ L=0.1,0.25,0.5