Fig. 4
From: A global annual simulated VIIRS nighttime light dataset from 1992 to 2023

Histogram comparison of the generated SVNL data (yellow outline) and real VIIRS NTL data (blue fill) for pixel values at global test spots by ranges: a1, a2 and a3 show sub-histograms for pixel value ranges of 0-10, 10-60, and above 60 in 2012, respectively; b1, b2 and b3 display the corresponding ranges for 2013, respectively.