I want to perform spatial averaging in the blue range of the attached image.
I want to find the average value for each reflectance in the blue space.
What should I do?
please tell me.
open the statistics tool 
and select the rectangle as AOI, as described in Figure 23 of this tutorial: Synergetic use of S1 (SAR) and S2 (optical) data and use of analysis tools
Thank you for your reply.
I’ll give it a try.