Figure 5

Comparison between (a) actual Sentinel-2 NDVI, (b) synthetic Sentinel-2 NDVI before calibration and (c) calibrated synthetic Sentinel-2 NDVI. (Figure (a) was calculated from Sentinal-2 imagery which was downloaded from the web page of the U.S. Geological Survey (USGS) Global Visualization Viewer (http://glovis.usgs.gov/); Figure (b,c) were calculated from MODIS images and Sentinal-2 imagery which were downloaded from the web page of the U.S. Geological Survey (USGS) Global Visualization Viewer (http://glovis.usgs.gov/); Figure (a–c) were combined to one Figure using Powerpoint 2013 (Microsoft Inc., Redmond, WA, USA, https://www.microsoft.com)).