Figure 3. Overall accuracy of AOD retrievals from Landsat imagery against ground-based measurements at the individual-site scale from 2013 to 2022 using the sample-based cross-validation approach: (a) correlation coefficient (R), (b) median bias, (c) mean absolute error (MAE), (d) root-mean-square error (RMSE), and the percentages of retrievals falling within the (e) expected error (EE) envelope of the MODIS Deep Blue product and (f) the uncertainty goal defined by the Global Climate Observing System (GCOS).
Table 1. Overall accuracy of AOD retrievals from Landsat imagery against ground-based measurements in ten continental regions of interest and on a global scale from 2013 to 2022 using the sample-based cross-validation approach.