Figure 7 shows the relationship between the actual Landsat-8 surface reflectance images and the synthetic Landsat-8 surface reflectance images for red, NIR, and spectral bands for the DOY 169, 185, 201, and 217. It demonstrated that strong relations existed between the actual and synthetic images for all the spectral bands of interest over the period of study. In the context of linear regression analysis, the , slope, and intercept values were in the range: (i) 0.72 to 0.82, 0.86 to 0.98, and 0.0009 to 0.042, respectively, for red spectral band; (ii) 0.71 to 0.79, 0.80 to 0.87, and 0.166 to 0.0800, respectively, for NIR spectral band; and (iii) 0.78 to 0.83, 0.91 to 0.94, and 0.0096 to 0.0367, respectively, for spectral band. In the context of RMSE analyses, they were: (i) in between 0.003 an d0.004 for red spectral band; (ii) 0.005 for NIR spectral band; and (iii) 0.004 for spectral band. In addition, the AAD values were 0.0002, 0.0003, and between 0.0001 and 0.0002 for the red, NIR, and spectral bands, respectively.