Variable Group | Type (number) | Variable | Definition |
---|---|---|---|
a | Spectral reflectance (10) | B2 | Blue, 490Â nm |
B3 | Green, 560Â nm | ||
B4 | Red, 665Â nm | ||
B5 | Red edge, 705Â nm | ||
B6 | Red edge, 749Â nm | ||
B7 | Red edge, 783Â nm | ||
B8 | Near infrared, 842Â nm | ||
B8a | Near infrared, 865Â nm | ||
B11 | Short wave infrared, 1610Â nm | ||
B12 | Short wave infrared, 2190Â nm | ||
Vegetation indices (19) | ARVI | Atmospherically resistant vegetation index, \(\mathrm{B}8-(2\times \mathrm{B}4-\mathrm{B}2)/\mathrm{B}8+(2\times \mathrm{B}4-\mathrm{B}2)\) | |
CIg | Chlorophyll Index green, \((\mathrm{B}8/\mathrm{B}3)-1\) | ||
CIre | Chlorophyll Index red edge, \((\mathrm{B}7/\mathrm{B}5) -1\) | ||
II | Infrared index, \((\mathrm{B}8-\mathrm{B}11)/(\mathrm{B}8+\mathrm{B}11)\) | ||
MCARI | Modified chlorophyll absorption ratio index, \(\left[\left(\mathrm{B}5-\mathrm{B}4\right)-0.2\times (\mathrm{B}5-\mathrm{B}3)\right]\times (\mathrm{B}5-\mathrm{B}4)\) | ||
S2REP | Sentinel-2 red-edge position index, \(705+35\times \left[\frac{\left(\mathrm{B}4+\mathrm{B}7\right)}{2}-\mathrm{B}5\right]\times (\mathrm{B}6-\mathrm{B}5)\) | ||
MidIR | Infrared index, \(\mathrm{B}11/\mathrm{B}12\) | ||
MSI | Moisture Stress Index, \(\mathrm{B}11/\mathrm{B}8\) | ||
NDVI | Normalized difference vegetation index, \((\mathrm{B}8-\mathrm{B}4) / (\mathrm{B}8 +\mathrm{ B}4)\) | ||
NDI45 | Normalized difference vegetation index wi band4 and band5, \((\mathrm{B}5-\mathrm{B}4) / (\mathrm{B}5 +\mathrm{ B}4)\) | ||
RVI | Ratio vegetation index, \((\mathrm{B}8 /\mathrm{ B}4)\) | ||
SAVI | Soil adjusted vegetation index, \(1.5\times (\mathrm{B}8 -\mathrm{ B}4) / 8\times (\mathrm{B}8 +\mathrm{ B}4 + 0.5)\) | ||
IPVI | Infrared percentage vegetation index, \(\mathrm{B}8 / (\mathrm{B}8 +\mathrm{ B}4)\) | ||
PVI | Perpendicular vegetation index, \(\mathrm{sin}(45^\circ )\times \mathrm{B}8 -\mathrm{ cos}(45^\circ )\times \mathrm{B}4\) | ||
PSSRa | Pigment specific simple ratio chlorophyll index, \(\mathrm{B}7/\mathrm{B}4\) | ||
PSRI | Plant Senescence Reflectance Index, \((\mathrm{B}4-\mathrm{B}3)/\mathrm{B}6\) | ||
REIP | Red-edge infection point index, \(700+40\times \left[\frac{\left(\mathrm{B}4+\mathrm{B}7\right)}{2}-\mathrm{B}5\right]/(\mathrm{B}6-\mathrm{B}5)\) | ||
TNDVI | Transformed Normalized Difference Vegetation Index, \(\sqrt{\frac{\mathrm{B}8-\mathrm{B}4}{\mathrm{B}8+\mathrm{B}4}+0.5}\) | ||
VARI | Visible light atmospheric impedance vegetation index, \((\mathrm{B}3-\mathrm{B}4)/(\mathrm{B}3+\mathrm{B}4-\mathrm{B}2)\) | ||
Biophysical variables (5) | LAI | Leaf area index | |
FVC | Fraction of vegetation cover | ||
FAPAR | Fraction of absorbed photo synthetically active radiation | ||
Cab | Chlorophyll content in the leaf | ||
Cwc | Canopy water content | ||
b | Multi-scale WT texture of Sentinel-2 (120) | a_i_Bj | Approximate texture |
h_i_Bj | Horizontal texture | ||
v_i_Bj | Vertical texture | ||
d_i_Bj | Diagonal texture |