Table 1.

Formulas and references of the vegetation indexes used in this study.

Index	Formula	Reference
NDVI	$NDVI=\frac{R_{NIR}-R_{red}}{R_{NIR}+R_{red}}$	[35]
RDVI	$RDVI=\frac{R_{NIR}-R_{red}}{\sqrt{R_{NIR}+R_{red}}}$	[36]
TCARI	$TCARI=3\ast [\left(R_{RedEdge}-R_{red}\right)-0.2\ast \left(R_{RedEdge}-R_{green}\right)\ast \left(\frac{R_{RedEdge}}{R_{red}}\right)]$	[37]
OSAVI	$OSAVI=(1+0.16)\ast \left(R_{NIR}-R_{red}\right)/\left(R_{NIR}+R_{red}+0.16\right)$	[38]
NDRE	$NDRE=\frac{R_{NIR}-R_{Red Edge}}{R_{NIR}+R_{Red Edge}}$	[39]