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Table 2 Landsat-8 Operational Land Imager (OLI), SPOT-5 multispectral (XS), and Sentinel-2 Multispectral Instrument (MSI) bands; wavelength intervals (λ); and indices used as predictors of forest structural attributes in this Minnesota, USA, study to quantify coniferous forest fuel using field data collected in 2015 and 2016. Indices include normalized difference vegetation index (NDVI; Rouse et al. 1974), shortwave infrared to near-infrared ratio (SWIR:NIR; Vogelmann and Rock 1988), and SWIR to visible ratio (SVR; Wolter et al. 2008). Equations for NDVI, SWIR:NIR, and SVR are shown using sensor-specific band numbers defined below each sensor column. Dashes (–) denote where SPOT-5 lacks an equivalent predictor band

From: Modeling sub-boreal forest canopy bulk density in Minnesota, USA, using synthetic aperture radar and optical satellite sensor data

Predictor Landsat-8 OLI SPOT-5 XS Sentinel-2 MSI
Band λ (nm) Band λ (nm) Band λ (nm)
Blue 2 452 to512 2 458 to 523
Green 3 533 to 590 1 500 to 590 3 543 to 578
Red 4 636 to 673 2 610 to 680 4 650 to 680
Near-IR 5 851 to 879 3 780 to 890 8 785 to 899
SWIR1 6 1566 to 1651 4 1580 to 1750 11 1565 to 1655
SWIR2 7 2107 to 2294 12 2100 to 2280
  Equation Equation Equation
NDVI (5 − 4) ÷ (5 + 4) (3 − 2) ÷ (3 + 2) (8 − 4) ÷ (8 + 4)
SWIR:NIR 6 ÷ 5 4 ÷ 3 11 ÷ 8
SVR (6 + 7) ÷ (2 + 3 + 4) 4 ÷ (1 + 2) (11 + 12) ÷ (2 + 3 + 4)