It may be noticed that the data points in Fig. 3 are scattered around the 1:1 line with the Root Mean Square Error (RMSE) of 9.3%, the Mean Bias Error (MBE) of −0.5% and the mean absolute error of 7.1%, with respect to the mean measured wind speed. Note that the RMSE of 9.3% is equivalent to 0.41 m/s. The negative MBE indicates that the model slightly underestimates the wind speed. This is likely due to the fact that the model calculated only mean wind speeds, which considers wind speed in average conditions, whereas the measurements recorded all wind conditions including wind gust, causing higher values in the measurements.
It is difficult to compare the uncertainty of our result with other works as statistical indicators used are different. Mortensen et al. (2005) used KAMM to estimate wind speed in Egypt and the comparison between the calculated and measured mean wind speed values gave mean absolute error between 7.6% and 12.4%. The uncertainty of our result is comparable to that of Mortensen et al. (2005).